SERVICE MANUAL For KITCHENAID
Contents
1. Nn Fig 97 Adjusting the beater to bowl height using the adjusting screw Q Both Bowl Lift and Tilt Head international export models require an F filter that is mounted to the bottom cover of the motor housing with a single round head screw Fig 75 SECTION TROUBLESHOOTING THE BOWL LIFT STYLE ASSEMBLY NOTE Newer models have an adjusting screw located on the top center of the column for adjusting the bowl to beater clearance A If the beater rubs the bottom of the bowl it can be corrected by turning the adjusting screw out If the unit has no adjusting screw it can be corrected by tapping the yoke arms down evenly with a mallet There should be 1 16 clearance between the bowl and beater B If too much clearance between beater and bowl adjust the screw in until the 1 16 beater to bowl clearance 15 met If unit has no adjusting screw use a mallet to tap both sides of the yoke up evenly until the 1 16 beater to bowl clearance is met If beater to bowl clearance is not met you will have to change the bowl support NOTE The 1 16 clearance can be determined by dropping a dime in the bowl The flat beater should just touch the coin as the beater rotates C If the bowl rocks on the bowl support this is caused by a broken bowl spring latch Remove the two screws and place a new latch in position Screw in the two screws tightly Fig 95 D If the bowl retaining pins are worn th2. Pinion gear and shaft Fig 56 Check worm gear and pinion before reassemble To replace these gears drive out the groove pin Fig 57 Fig 55 Bevel center gear being lifted for inspection E Check the lower center bearing for wear This 1s an oilless bearing and should be in good condition jalin If it is worn the gearcase bottom cover will have to be replaced since the bearing is an integral part Fig 57 The drive pin must be removed to change the F If the attachment hub bevel gear was replaced gears then the bevel center gear on the bottom cover Make a note of the positions of fiber washers must also be replaced They will be installed the same way with the new ears From the top of the worm gear bracket drive G Place the same washer on lower center bearing 5 5 t the pinion shaft Place the gear assembly on top of the center sie meas bearing Insert the end of the vertical center shaft NOTE The pinion on pre May 6th 2002 opposite the O ring into the bottom cover K45SS models have 11 teeth On all other units Fig 54 the pinion has 10 teeth Paoe 17 KITCHENAID Stand Mixer Service Manual LIT4177310 C I Start a new pinion gear and shaft from the bottom of the bracket Before the shaft emerges from the lower bearing place a washer on the bearing and start the shaft into the washer Place a new worm gear next and push the shaft up into it Place the second washer on t
3. Routing Of White Wire Fig 37 Route the two stator wires through the slot in the motor housing Place the stator stud sleeve over the stator stud and route the white wire from the stator between the stud sleeve and the motor housing Fig 39 Locating the armature into the gearcase motor housing If necessary tap the end of the armature shaft with a non metallic mallet to seat the armature F Check the armature on a growler or take the armature to a electric motor repair shop and let them test 1t E mM bearing into the gearcase motor housing If it is not in good condition replace it with a new Check the bearing in the bearing bracket G Check the ventilating fan Straighten the blades To replace the bearing remove the retaining if they are bent Fig 38 clip Fig 40 Take out the felt washer and the old bearing Place the new bearing in cavity Soak the felt washer with oil and place in cavity Place the retainer on the bearing so that the tongue fits into the square notch and push the retainer clip in place Page 12 If the armature is replaced move the washers from the old armature to the corresponding end of the new armature Add one drop of Locktite to the outer race of the ball bearing and install the armature in the motor housing Fig 39 KITCHENAID Stand Mixer Service Manual LIT4177310 C On older models to replace the bearing remove the three 4 40x1 2 pan head screws and lift off the b
4. excessive watts Armature shimmed too tight See item J Section 3 Mixer will not shut off with switch lever MOST LIKELY CAUSE S Control plate spring unhooked Phase control shorted Wires connected wrong Loose connections on the control board Tight bearing Worn spherical bearing on the end of the armature shaft Worn armature thrust bearing Tight bearing if no smoke is apparent Overheated armature if the mixer smokes owitch not correctly adjusted with Appendix B 2 WHAT TO DO CHECK Remove end cover and check control plate spring If unhooked reattach to bottom of the control plate check hook on end rebend if necessary With the line cord disconnected pull the T bar contacts open and insert a piece of paper between them so they can not close Reapply power the mixer should just run or buzz trying to run If it operates at full speed the phase control is defective Check wiring Check connections on the control board to make certain they are tight First remove the planetary to check the beater shaft bearing in the planetary If the beater shaft can be easily moved back and forth with a twisting effort it is satisfactory If it binds replace the planetary If it checks okay recheck the mixer without it If the mixer still uses excessive watts it must be disassembled and the other bearings checked Remove bearing bracket and replace Replace the thrust ball bearing on the a
5. torque using the sequence shown Insert the four 10 24x1 fillister head screws into the bottom cover making sure they are tight Fig 63 18 20in Ibs Q Place a small amount of Benalene 930 2 11 lubricant on the teeth of the internal gear Check the condition of the planetary If there is any play in the agitator shaft and the bearing not Fig 65 Lift the pinion off and take out the pin and shown replace the planetary and the shaft remove the washer then pull out the shaft Page 19 n FA 4 2 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid S The agitator shaft is complete as an assembly Lubricate the shaft and push it up into the bearing as far as it will go Place the washer s on the shaft Insert the pin through the shaft Set the pinion gear on the shaft so that the notches in the pinion align with the pin in the shaft Install the retaining clip in the groove on the shaft Fig 64 Fig 68 Carefully drive the groove pin into the shaft of the planetary O V Place the drip cup on the bottom cover Tap it down into place using a non metallic hammer W Check the beater height adjusting screw Fig 69 Fig 66 The planetary components are shown disassembled This screw is slotted and has a nylon insert As it is screwed in threads are cut in the nylon and hold the screw tight Replace this adjusting screw if it is loose in the threads Place the
6. Plat ARMATURE 4 118 2272 Brush Holders Phase Control i Adjust this screw to give 175 180 at the planetary for speed 6 after Stir Speed has been adjusted If using a digital tachometer at the attachment hub set the reading at 141 170 RPM WHITE BLACK cr e E E WHITE BLACK Appendix C KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid STAND MIXER WIRING DIAGRAM INTERNATIONAL MODELS RF FILTER WHITE WHITE 41 8 8 1 2 Adjust these screws equally to give 60 R P M at the planetary on Stir Speed If using a digital tachometer at the attachment hub set the reading to 40 64 R P M on Stir Speed ARMATURE RED WHT 4 1 8 RED 3 1 4 FIELD BLACK RED 4 1 8 9 1 8 Control Plate Brush Holders Phase Control Adjust this screw to give 175 180 R P M at the planetary for Speed 6 after Stir Speed has been adjusted If using a digital tachometer at the attachment hub set the reading at 141 170 RPM LT BLUE 3 3 4 R4 Bi P N 4104821 C Cl BLACK 3 3 8 3C CIRCUIT BREAKER DLALR J P N 9702309 WHITE GREEN YELLOW BLUE INSULATED RECEPTICAL BROWN OPPOSITE END JACKET STRIPPED BACK 3 1 8 Appendix D KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenA
7. electrical or mechanical problems Check first for bearing gear drag then for motor brush problems CAUTION Always remove power cord from electrical outlet before servicing any part of the mixer PAGE 2 KITCHENAID Stand Mixer Service Manual LIT4177310 C C Note remove the bowl and any attachments before disassembly of unit Remove the 6 32x3 8 tapered head screw from the end cover Fig 1 iW Fig 1 The end cover is removed by removing the tapered head endcover screw Remove the two 6 32x3 16 screws that hold the trimband to the gearcase motor housing Fig 2 With the screws removed take the trimband off and Set aside A ee gt 2 E 7 7 M Fig 2 The trimband can be removed after removing the trimband screws D To save the paint lay the unit in a padded cradle or on a cloth pad To remove the pedestal from the gearcase bottom cover turn the unit upside down in a padded cradle Loosen the set screw with a screwdriver Fig 3 2005 KitchenAid Fig 3 Loosen the hinge pin setscrew to remove the pedestal from the bottomcover Using a drift punch and hammer drive out the hinge pin Fig 4 and lift the pedestal off the gearcase bottom cover Fig 4 A drift punch and hammer is used to drive out the hinge pin E To remove the planetary first remove the drip ring Use a screwdriver on the upper edge of the drip ring and gently tap the s
8. motor shaft when removing the armature Remove the worm end bearing washer and the fan end spacer washer Page 9 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid H Pull the two wires from the rear of the stator I To remove the brush holder it will be through the slot in the gearcase motor housing so necessary to remove the other stator stud they are inside the gearcase motor housing and Under the stator studs are 10 24x1 4 cup point sticking out the back Fig 31 screws To remove the set screws use a 3 32 Allen wrench older models may use a flat screwdriver Fig 33 Fig 31 Wire orientation inside the gearcase motor housing Using long pliers pull the brush slips from the stator out of the brush holders Note orientation of stator clip in brush holder Remove the two 10 24 nuts from the stator studs and carefully set aside for use during reassembly Unscrew one stator stud and pull out the stator Fig 32 Fig brush holder set screws with a a Unscrew the set screws few turns and from amp GE M inside the housing push the brush holder out by PLANE ae hand Note the orientation of the brush insert m inside the brush holder Fig 32 The stator is shown being removed from the motor housing To pull the stator out reach into the motor housing and grasp the stator and pull it out Caution Do not nick or damage the copper coil wires on
9. screw and tension washer are removed with a phillips screwdriver Before removing the speed control link and cam assembly remove the control board spring from the link The flat spring is removed as you remove the speed control link assembly speed control link and cam assembly Fig 26 Two 10 24 nuts are removed from the removed by pulling it out of the gearcase motor bearing bracket housing Fig 25 BIER Remove the bearing bracket Fig 27 Now remove the motor stud sleeve from the stator stud Fig 28 Page 8 KITCHENAID 2005 KitchenAid Fig 27 Bearing bracket being removed after two 10 24 Fig 29 the brush holder caps are loosened to access nuts have been removed brushes for removal Make sure to mark orientation 2 ax G The armature can now be removed With the attachment hub bevel gear removed insert a drift punch through the attachment hub opening and gently tap the armature back through the stator using a block of wood to protect the shaft Fig 30 d r 4 Fig 28 The motor stud sleeve is shown being removed after bearing bracket removal Unscrew the two brush holder screw caps remove the brushes and springs Fig 29 Viewing from the rear mark the brushes right and left and also the top of the brush just as it was co v em o removed from the motor Fig 30 A block of wood is used to protect the
10. screws Fig 86 from the base and set the base aside E Remove the two 10 24x1 2 flat head screws from the bowl support Fig 87 and slide the bowl m support down and off the column Fig 88 F Examine the bowl lift arm This part is held on the bowl lift handle with a tapered pin If the arm is cracked at the pin hole replace it Fig 87 Two flat head screws hold the bowl support to the If there is any fault with the column replace it at bowl lift assembly this time Page 25 KITCHENAID Y Fig 88 Slide the bowl support down and off the column to replace the bowl lift assembly G To install the new bowl lift arm drive out the roll pin Fig 89 With the roll pin out remove the bowl lift handle Fig 90 The bowl lift arm can now be removed along with the bowl lift mechanism p L HANDLE UP BOWL LIFT ARM Fig 90 With the roll pin removed pull out the handle Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid H With the bowl lift handle down push it through the column through the new arm and into the bearing hole in the column Place the roll pin in the arm and drive it through the lift handle until it is almost flush with the arm Fig 91 Be sure the pin is tight Check the beater height adjusting screw replace if missing Fig 91 l BEATER HEIGHT ADJUSTING SCREW HANDLE DOWN Fig 91 The roll pin is driven in until it is almost flush with the
11. the bevel gear with a light grease Fig 52 Worm gear bracket bearing and pin assembly Push it into the attachment hub bearing from the inside of the gearcase Fig 51 It does not have a D Remove the center bevel gear and vertical center washer so push it in as far as it will go hate Push the vertical center shaft upward exposing the pin Fig 53 and remove the pin Fig 51 attachment hub bevel gear being pushed into the attachment hub bearing from inside the gearcase 4 Fig 53 Remove after pushing vertical center shaft up C With a phillips head screwdriver remove the three 10 24x7 16 phillips filister head screws and Pull out the vertical center shaft with your fingers lock washer assemblies and lift up on the worm and remove the shaft from the the bottom of the gear gear bracket bearing and pin assembly to remove case bottom cover Fig 54 Fig 52 Check the shaft for bearing wear Dark gray or indented surfaces indicate shaft should be replaced Lift gears from case for inspection Fig 55 Page 16 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid Push shaft upward and insert the pin Fig 53 Center pin in shaft and lower shaft into gear assembly Turn shaft until pin seats in gears and gears and shaft turn together Wipe all excess lubricant from bottom of vertical shaft on O ring H Check the worm gear and pinion gear Fig 56 Worm Gear
12. the motor Page 10 KITCHENAID Stand Mixer Service Manual LIT4177310 C SECTION 3 REPAIRS TO MOTOR AND CONTROL UNIT A Clean the brush holder with solvent and wipe them dry with a clean dry cloth Install the brush holder into the gearcase motor housing so that the rim on the holder seats against the bore step in the motor housing B Clean the brush holder inserts with solvent and wipe them dry with a clean dry cloth Install the inserts into the brush holder They must be oriented viewing the motor housing from the rear as shown below in Fig 34 CHAMFER EDGE LEFT HAND BRUSH RIGHT HAND BRUSH ROTATION J CHAMFERED CHAMFER EDGE EDGE Fig 34 The orientation of the brush holder inserts viewing from the rear of the motor housing Lock the brush holder with inset in place with the 10 24x1 4 cup point setscrews EARLY PRODUCTION SOLID STATE STAND MIXERS The early production solid state stand mixers utilized a square brush and brush holder Square brushes are no longer available Brushes with chamfered edges will fit into square brush holders 2005 KitchenAid C Test the stator with an ohmmeter Fig 35 Set the ohmmeter on the scale and be sure it 1s set at zero ohms when shorting the test leads Fig 35 Test the two stator coils with an ohmmeter set on low scale In upper coil connect one ohmmeter lead to the red wire and the other to the black wire of the coil If the ohm
13. washer s on the vertical shaft Be sure the planetary pinion and the internal gear have a light coat of grease Benalene 930 2 on them Place the planetary on the shaft and push it down Line up the holes in the planetary and shaft It may be necessary to use an awl or pointed punch to align the holes Fig 67 Ap r 7 M Fig 69 adjusting screw has nylon insert and v should not be loose in the threads Fig 67 A pointed punch can be used to align the holes of the shaft with the planetary U Drive the groove pin into the shaft Fig 68 There should be a very small amount of end play Page 20 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid SECTION 5 C If the bowl screw cap has worn out be sure to replace it REPAIRS TO TILT HEAD PEDESTALS To remove the old cap take out the three 10 24x1 2 flat head screws and lift out the old cap A If pedestal is removed check the hinge pin If it is Put the new cap in place and screw it down tight galled from failure to loosen the set screw replace with the three screws Eis 72 24 32 in Ibs it Fig 70 quim mn gt Hinge pin set screw _ i a 1 Fj lt Oo Fig 72 The new cap is secured to the pedestal with three screws Fig 70 The set in the bott f the pedestal should a s clear the hinge pin pe D While in the cradle place the pedestal on the Loosen the set screw s
14. 050 K 2000 2030 2060 1 1981 2011 2041 A 1991 2021 2051 L 2001 2081 2061 2 1982 2012 2042 B 1992 2022 2052 M 2002 2032 2062 1983 2013 2043 C 1993 2023 2053 P 2003 2033 2063 4 1984 2014 2044 D 1994 2024 2054 R 2004 2034 2064 5 1985 2015 2045 E 1995 2025 2055 S 2005 2035 2065 6 1986 2016 2046 F 1996 2026 2056 T 2006 2036 2066 7 1987 2017 2047 G 1997 2027 2057 U 2007 2037 2067 8 1988 2018 2048 H 1998 2028 2058 W 2008 2038 2068 9 1989 2019 2049 J 1999 2029 2059 Y 2009 2039 2069 WEEK MANUFACTURED CODE Two positions represent the week 00 to 52 of the year The first Monday of the calendar year will begin with week 01 omall production products can use 00 for the week if authorized by Corporate Information Services SERIAL NUMBER CODE The assigned serial number will begin with 01001 or 10001 and will be incremented by one for each unit produced until 99999 which will revert to the beginning assignment Serial numbers may be sequenced through several model numbers Appendix F KITCHENAID Stand Mixer Service Manual Lit4177310 C 2005 KITCHENAID IRST Safety Guidelines h IRS N This Service Manual 15 written for the Professional Service Technician who has familiarity with the KitchenAid Stand Mixer The following Safety Guidelines should be adhered to when servicing this product NOTICE SERVICE ENVIRONMENT Wash Your
15. SERVICE MANUAL for KITCHENAID STAND MIXER Models K45SS KSM75 KSM90 KSM103 KSM110 KSM150 KSM151 K5SS 5 KSM50P KSMC50 5 50 KP50P Printed in U S A September 2005 LIT4177310 C KITCHENAID Stand Mixer Service Manual Lit4177310 C 2005 KITCHENAID IRST Safety Guidelines h IRS N This Service Manual 15 written for the Professional Service Technician who has familiarity with the KitchenAid Stand Mixer The following Safety Guidelines should be adhered to when servicing this product NOTICE SERVICE ENVIRONMENT Wash Your workplace will be dry and sanitary at all times and all units should be inspected for cleanliness before any work is started Visually inspect the unit requiring service in a well luminated area eA mild non abrasive dishwashing soap solution and clean towel be used to wash any unit requiring attention he hands of the service technician should be clean at all times during service procedure ELECTRICAL CONSIDERATIONS Electrical Hazard he workplace for the stand mixer will have properly grounded AC outlets that adhere to all Local Electrical Codes that are applicable at the time of repair he Stand Mixer Power Cord should always be inspected first before testing the mixer operation Do NOT run the mixer if the Power Cord is damaged replace it eAll disassembly and assembly procedures discussed in this manual should be conducted with the unit
16. WS 9 LOCK WASHER UNDER 1 GEAR CASE MOUNTING SCREW K45 REAR LOCK WASHER UNDER 1 BASE MOUNTING SCRW KSMC50 ONLY LOWER GEAR CASE AND COLUMN MOUNTING SCREW 4 K5 AGITATOR SHAFT BEATER DRIVE PIN 1 5 50 GUARD PIN 1 5 50 CIRCUIT BREAKER NUT 1 HEAD LOCK PIVOT SCREW 1 K45 HINGE PIN LOCKING SCREW 1 K45 STATOR RETAINING NUTS 2 PHASE CONTROL RETAINING SCREW 1 PLANETARY GEAR RETAINING SCREW 1 50 TRIM BANDMOUNTING SCREW 2 EUROPEAN GROUND AND FILTER MOUNTING SCREWS STATOR STUD TORQUE IN LBS 125 150 15 20 24 32 18 23 18 23 4 6 3 5 18 23 MIN 9 18 23 4 7 4 6 18 20 125 150 30 40 HAND TIGHT HAND TIGHT 18 23 24 33 MIN 30 4 5 18 23 8 10 MIN 18 3 5 TR TORQUE GUNS RE SET 15 20 LBS NUTS MUST BE HAND TORQUED AT LEAST 1 4 OF A TURN WITH A HAND NUT RUNNER WORM GEAR BRACKET MOUNTING SCREWS 3 BOWL ADJUSTMENT SCREW 5 18 23 10 12 BEFORE ASSEMBLY DIP SPEED CONTROL LEVER PIVOT SCREW AND GURAD PIN INTO A LOCKTITE 271 SOLUTION Appendix B 1 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid PROBLEM SOLVING QUICK REFERENCE GUIDE MIXER PROBLEM Mixer runs only on high speed Mixer runs with a jerking clattering noise on low speed Tight shim on vertical shaft between planetary and lower gear case See item V Section 4 Loud rumbling or howling noise Mixer runs but will not come up to high speed Has power but labors and uses
17. al model bottom cover with filter and check the speed again spring loaded lock lever The small circuit board shown Fig 75 is an RF filter used on international models that 1s held to the bottom cover with a single round head screw Page 22 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid E 1 i i ae ie P Fig 77 Carefully let the planetary touch your finger to test Fig 79 Adjusting screw at the bottom of the control plate speeds for speed 6 F Try all mixer speeds from stir to 10 PX a If stir and 6 are properly adjusted the other speeds should automatically be correct If there is a definite change in speed between 8 and 10 the control unit 1s correctly adjusted G A digital speed device Fig 80 is available to adjust the planetary speed settings on all KitchenAid mixers Insert this end into the attachment hub Fig 78 Once proper speed setting has been obtained lock the two 11 32 lock nuts If a small correction must be made make it without loosening the lock nuts Test speeds as before and when correct it will not be necessary to disturb the lock nuts E Move the switch lever to speed 0 At this setting the planetary must turn at 180 revolutions per minute 4 m 1g ectronic speed measurin WI Check the speed as was done for sur sp
18. arm While the adjusting screw is replaced from this side it is adjusted from the other I Slide the new bowl support assembly on the column Fig 88 Place the bowl lift bracket in place and screw in the two 10 24x1 2 flat head screws Fig 87 These screws must be very tight Check the castle nut so that the tension will be great enough to snap the rod into the arm and hold it there Fig 92 o Fig 92 Check the castle nut for proper tension on the bowl lift bracket J Place the base on the bottom of the column and screw in the four 5 16 18x3 4 round head screws Fig 86 Tighten these screws to 70 90 in Ibs of torque Page 26 KITCHENAID Stand Mixer Service Manual LIT4177310 C K If the mixer base feet are worn replace them To replace the mixer base feet pull them out using pliers and a twisting motion Older models require the removal of four 8 32 x 1 2 round head screws to remove the feet Fig 93 Fig 93 Remove the four round head screws to remove the feet from older models Install new feet by pushing the tapered end into the foot supports with a twisting motion Fig 94 Older models place the screws in the new feet and screw the feet to the base Do not tighten so much as to push the screw through the rubber Fig 93 Fig 94 Push tapered end of foot into foot support with twisting motion until seated L The bowl spring latch must be removed from the old bowl support a
19. case after increase between 8 and 10 speeds If not back speed 6 down slightly until there is at least minor speed change between 8 and 10 The 10 speed should be at least 185 185 250 When proper speeds have been set lock the two lock nuts on the upper mounting screws using an 11 32 wrench Be careful not to move the mounting screws in or out during the locking process Recheck speeds after locking the nuts and if a fine adjustment is needed it can be done without loosening the locking nuts G Place the trimband Fig 81 on the gearcase housing and with the two 6 32 x 3 16 Fig 82 The end cover is secured to the mixer with a screws fasten it to the housing tapered head screw Tuck in all the wire leads insure no wires are pinched and place the end cover on the end of the motor housing and secure it with the 6 32 x 3 8 oval head screw Fig 82 H With the end cover on the machine test the speeds again to make sure no change took place in the control plate With mixer working correctly place the bowl on the bowl screw cap Place the flat beater on the agitator shaft There should be approximately 1 16 clearance between the bowl and beater A If the beater is too close to the bowl turn the beater height adjusting screw out In if it 1s too far away Fig 83 83 The beater height adjustment screw used to set The mi
20. crewdriver to remove the drip ring Fig 5 PAGE 3 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid F Remove the power cord from the bottom cover by sliding the molded strain relief out of the slot in the bottom cover Fig 8 Fig 5 The Drip Cup fits tightly and must be started off by tapping it With a 5 32 drift punch remove the groove pin that holds the planetary to the vertical center shaft Fig 6 Fig 8 Pull back on the molded strain relief to remove the power cord from the slot in the bottom cover To remove the power cord with the Heyco strain relief used on older models use a pair of pliers to squeeze the strain relief while pulling up Fig 9 Reverse this procedure to reinstall it p Fig 6 Removal of the groove pin that holds the planetary to the vertical center shaft With the pin out the planetary can be removed from the center shaft Using two 2 screwdrivers pry the planetary up and off the shaft Fig 7 e Fig 9 Removal of Heyco strain relief using pliers A SS Lm G To remove the bottom cover from the gearcase S motor housing unscrew the five 5 10 24 special screws Fig 10 These screws hold the internal gear into the bottom cover Next remove the four 4 filister head screws from the bottom cover Fig 11 Fig 7 Use two screwdrivers to pry the planetary off the haft Page 4 KITCHENAID Stand Mixer Ser
21. disconnected from the AC mains NOT leave the unit unattended while running the mixer for speed range and bowl clearance checks Always unplug the unit immediately after concluding these tests Technician he Service Technician should wear Protective Eyewear at all times when conducting a repair on the Stand Mixer eLoose fitting sweaters shirts sleeves or bracelets should NOT be worn while servicing the Stand Mixer SAFETY KITCHENAID Stand Mixer Service Manual Lit4177310 C 2005 KITCHENAID INDEX Stand Mixer Repair Manual 4555 KSM75 KSM90 KSM103 KSM110 KSM150 KSM151 K5SS 5 5 KSM50P 5 50 5 KPM50 KP50P SECTION SUBJECT PAGE General Information 1 1 Disassembly of Gearcase and Planetary 2 2 Disassembly of Motor and Control Unit 6 3 Repairs to Motor and Control Unit 11 4 Repairs to Gearcase and Planetary 16 5 Repairs to Pedestal 21 6 Adjustment to Control Unit 22 7 Repairs to Bowl Lift Assembly 26 8 Troubleshooting the Bowl Lift Assembly 30 APPENDIX SUBJECT A Tools Required for Stand Mixer Service B Problem Solving Quick Reference Guide C Domestic Model Wiring Diagram D International Model Wiring Diagram RF Filter International Model Wiring Diagram Bowl Interlock RF Filter F Stand Mixer Serial Number Codes Introduction All KitchenAid Stand Mixers are well designed and carefully built Normally they will give continual use year after year without service attention Careful rec
22. e bowl will move on the pins and the beater will hit the sides of the bowl To replace the pins twist and pull up at the same time They are not difficult to remove To install the new pins in the bowl support place pins in holes support the end of the arms with a heavy object and drive the pins down gently Be careful not to bend the arms of the bowl support Page 28 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid APPENDIX KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid Tools Required for Stand Mixer Service Mallet Umm Electronic Speed Measuring Device T m Need R gt 2 Phillips Screwdriver E E G j do 1 MODE 3 8 Hollow Shank Nut Driver 94 4 4j 1 5 32 Drift Punch Other Helpful Tools rift Punc 7 1 2 Socket Awl or Pointed Punch Volt Ohm Meter 7 gt 11 ut gt po C _ 27 di 1 j 0 p D 1 1 2 gt 45 Angle F 1 1 2 G 3 4 Plywood 8 X 11 Cradle Make your own from wood cushion with cloth to avoid damage to finish of mixer Appendix A Stand Mixer Service Manual LIT4177310 C KITCHENAID 2005 KitchenAid PROBLEM SOLVING QUICK REFERENCE GUIDE MIXER PROBLEM Switch lever clicks but mixer will not run or buzz Mixer wi
23. earing retainer Take out the old bearing and felt washer Place new bearing in cavity with the square notch toward the top of the bracket Soak the felt washer in bearing cap with oil Place the retainer on the bearing and screw in place with the three 4 40x 1 2 screws ongue Square Notch 9 C Fig 40 Bearing bracket assembled amp unassembled I Install the bearing bracket Start bracket onto the two stator studs Push the bracket back until the stator studs are through the bracket and it seats into the ribs of the gear case Start the two nuts on the stator studs and turn them until the bearing bracket 15 seated Fig 41 nm E T e 4 4 4 1 D jl mu e E A i E i tor EE o 2 A me Fa h ze Tu p ak B IN Fig 41 Tighten the two nuts on the stator studs to seat the bearing bracket 7 2005 KitchenAid J The armature should always be checked for end play Armature should turn freely with minimal end play On older models after the thrust bearing assembly has been seated properly and proper amount of spacing washers placed at the rear there should only be a perceptible amount of end play to assure free operation of the armature If there is too much end play add another thin washer To do this remove the bearing brack
24. eed E numerical display for setting speeds on KitchenAid The planetary should touch your finger 45 times in mixers 15 seconds To use this device the main control box needs to If the planetary touches the finger less than that turn be plugged into a 120 volt power source the adjusting screw at the bottom of the control plate Insert the tapered metal end of the speed sensing Fig 79 unit into the attachment hub of the mixer The Check the revolutions again and keep adjusting the tapered hub is machined the same as all mixer screw at the bottom until the right speed is reached attachments Secure it in place by tightening the There is no locking of this screw thumb screw Page 23 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid The control plate is spaced 3 8 from the mounting bracket for the proper speed setting Starting Point Plug the mixer into a watt meter set at the proper voltage Turn the mixer to Stir Speed The mixer may or may not start If not turn the two mounting screws out evenly until mixer starts Adjust both screws evenly until a speed setting of 40 40 64 1s attained Turn mixer to speed 6 The single screw at the bottom of the control plate 1s used to control this speed adjust to attain speed of 150 141 170 Turn speed control to speed 8 pause then turn to speed 10 There should be a noticed speed Fig 81 Replace the trim band on the gear
25. emove planetary and take off the pinion gear Replace the drive pin Remove the planetary amp bottom cover NOTE The complete bottom cover assembly must be replaced Replace the governor Control plate contacts not going closed Adjust the control plate Replace the phase control Check the connections to the control plate Repair any loose connections Replace the control plate assembly Remove end cover and reset stir speed The planetary should revolve at 60 RPM on stir Turn switch lever to 10 position and hold out the control plate as far as possible Turn the switch lever to OFF Watch the governor as it recedes when the armature slows down If faulty replace it Replace attachment hub gear Replace gear case motor housing BAB E NA Stand Mixer Service Manual LIT4177310 C FASTENER REQUIREMENTS A FASTENER AND TORQUE VALUES 2005 KitchenAid LISTED BELOW ARE THE FASTENERS AND TORQUE VALUES USED IN THE ASSEMBLY OF THE KITCHENAID DESCRIPTION BASE amp COLUMN MOUNTING SCREWS 4 K45 BEARING BRACKET ASSEMBLY RETAINING NUTS 2 BOWL SCREW CAP RETAINING SCREWS 3 K45 BOWL SPRING MOUNTING SCREWS 2 K5 BOWL SUPPORT MOUNTING SCREWS 2 K5 BRUSH HOLDER CAPS 2 BRUSH HOLDER SET SCREWS 2 CONTROL LEVER SPEED PIVOT SCREW 1 CONTROL PLATE LOCKING NUTS 2 ELECTRIC CORD GROUNDING SCREW 1 END COVER RETAINING SCREW 1 FEET MOUNTING SCREWS 4 K5 GEAR CASE RETAINING SCRE
26. et and add the washer to the armature shaft then reassemble the bearing bracket into the gear case motor housing K Ifthe old brushes are more than 5 16 long assemble them in the brush holders From the back of the unit put the brush marked right in the right side of brush holder Be sure the side marked up is at the top Push the brush in and lock it in place with a brush holder screw cap Fig 42 Put left hand brush in the mixer in the same way Fig 42 Placing one of the brushes into the mixer brush holder L Place the speed control link and cam assembly through the slot in the bearing bracket with the cam portion of the speed control link and cam assembly toward the top of the gearcase motor housing Place the flat spring in position and slide the mixer speed link and cam assembly over the flat spring attach the speed control spring on the speed control link and cam assembly Fig 43 Page 13 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid F Fig 43 Slide the speed control link over the flat spring and attach the speed control spring to the link Place the stud on the speed lever through the hole in the speed control link Place the tension washer on the pivot screw and Fig 45 The governor shown before being placed on the ow ON motor shaft screw it into the gearcase motor housing until tight Fig 44 EE Fig 44 Securing the pivot 54 0 the
27. f the screw remains Have both screws turned in evenly so the opposite end of the control plate rests squarely on the extensions of the bearing bracket With long nose pliers hook the control plate spring into the hole on the bottom part of the control plate Fig 50 Fig 50 The control plate spring being grasped with pliers and positioning the hook into the hole at the bottom Place the end seal onto the mixer Connect the two flag terminals from the stator and the four flag terminals from the phase control to the control plate Refer to the wiring diagram for proper terminal connections Be certain flag terminal connections to control plate are tight If necessary crimp the terminals with a needle nose pliers Note Leave the control unit It is now ready for timing but a better job can be done when mixer is completely reassembled Page 15 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid SECTION 4 REPAIRS TO GEARCASE AND PLANETARY NOTE Grease is not shown in these pictures A Examine the bearings in the attachment hub area and top of the gearcase These bearings are cast into the gearcase motor housing If they are worn badly the entire housing must be replaced However shafts turn slowly in these bearings and the bearings have a long life B Examine the attachment hub bevel gear If it shows wear in the teeth it should be replaced Ew If the gear is replaced coat the shaft of
28. gearcase after placing the tension washer If the spring in the governor 15 rusty replace the governor assembly Place the governor drive pin in the armature shaft With drive pin at top of the shaft place the Fig 47 Using a 3 8 nut driver to seat the governor Tap governor on the shaft with the keyway up Fig 45 gently Never drive directly against governor ball Push the governor onto the shaft as far as it will go NOTE Never attempt to take the governor apart The purpose of this picture 1s to show where governor seats on drive pin Fig 46 Page 14 KITCHENAID Stand Mixer Service Manual LIT4177310 C N If the phase control was removed or has been replaced make sure the heat sink on the triac unit has sufficient amount of thermal conductive compound applied to that surface before assembly Place the 4 40x 1 4 pan head screw through the hole in the triac and screw it into the bearing bracket Fig 48 until it is tight 4 5 in Ibs Fig 48 The triac is shown being secured to the bearing bracket CAUTION Do not attach the phase control excessively tight as this pressure could deform the heat sink resulting in damage to the control O Place the control plate on the bearing bracket with the adjusting screws at the top Fig 49 3 Lb P a Fig 49 Placing the control board on the bearing bracket 2005 KitchenAid Turn in the screws until 3 8 o
29. he action of the switch lever Thus when the control plate is set close to the governor a relatively low speed of the motor causes the governor to make or break the mixer s electrical circuit through the control plate When the control plate is set farther away a greater motor speed is required before the governor starts breaking the circuit The action of the governor is such that the speed of the motor will remain constant for a given setting of the control plate within certain loads After certain loads have been exceeded the speed of the motor will drop to meet the torque requirements of the given load Speed is controlled by the governor and the control plate in conjunction with the phase control TRIAC RMS VOLTAGE BOTH CONTACTS OPEN 40 VOLTS ONE CONTACT OPEN 80 VOLTS BOTH CONTACTS CLOSED FULL VOLTAGE NOTE The triac regulates the power the motor sees depending on control board contacts A device called a triac is a part of the phase control circuit This device determines the amount of power the motor sees dependent upon the condition of the control board contacts If both contacts are open about 40 volts RMS is applied to the motor and about 80 volts is applied when either contact 15 closed and the other is open PAGE 1 KITCHENAID Stand Mixer Service Manual LIT4177310 C When both contacts are closed the triac is full on consequently full power is applied to the motor In this way the speed is contro
30. id STAND MIXER WIRING DIAGRAM INTERNATIONAL MODELS BOWL LIFT and R F FILTER WHITE WHITE Adjust these screws equally to give 4 118 FIELD 8 1 2 60 R P M at the planetary on Stir Speed If using a digital tachometer at the attachment hub set the reading to 40 64 R P M on Stir Speed lt r3 RED WHT 4 1 8 72 RED 3 14 2 FIELD BLACK RED EEF e 4 i 8 9 1 8 J o or o g pe Brush Holders Phase Control V Adjust this screw to give 175 02 R3 Re 180 at the planetary for LT BLUE 3 3 4 speed 6 after Stir Speed has been adjusted If using a digital tachometer at the attachment hub set the reading at 141 170 R P M BLACK P N 9101105 BLACK 3 3 8 INTERLOCK SWITCH WHITE P N 9102309 BLACK BLACK P N 9102309 R F FILTER CIRCUIT BREAKER INSULATED RECEPTACLE GREEN YELLOW 54 112 PPOSITE END JACKET STRIPPED BACK 3 1 8 Appendix E KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid STAND MIXER SERIAL NUMBERS SERIAL NUMBER Hj MANUFACTURING DIVISION W Greenville YEAR CODE See Below YEAR CODE The single position that represents the year of manufacture follows the manufacturing Division This coding structure would continue to be recycled every thirty 30 years following the example below 0 1980 2010 2040 X 1990 2020 2
31. ing and start joining them together Fig 60 Fig 60 Initial mating of bottom cover to gearcase motor housing Start the shaft into the upper bearing and slowly push the parts together Insert a punch into the center shaft turning back and forth while pressing down on the bottom cover to align the gears CAUTION Under no circumstances should you force the gearcase and bottom cover together If the gears are properly aligned these two parts will assemble with little or no force required Page 18 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid P If necessary to replace the internal gear pry it from the bottom cover Fig 61 y 2 e Fig 63 Secure the four fillister head screws The bearing is an integral part of the planetary Hold the agitator shaft firmly and remove the pinion retaining clip Fig 64 Fig 61 Internal a can be pried from the bottom cover and replaced if necessary When installing new gear start with beveled side down align notches with holes in gear case and tap evenly into place using a non metallic mallet Insert and tighten the five special screws evenly Fig 62 to 18 20 in lbs torque Fig 64 nos the agitator shaft and remove the retaining clip Lift off the pinion Take out the pin and remove the washer Fig 65 Pull the agitator shaft out a gt Ss Fig 62 Tighten the five special screws evenly to 18 20 in lbs
32. lead clip detached from brushholder Bad connection between field and cord Open circuited armature Open circuited field Incorrect brush orientation Disconnect from power source Turn the switch on and check for ground with a test lamp Touch one lead of the test lamp to a prong on the plug on the power cord and the other lead to an unpainted surface on the motor housing If the lamp lights the mixer is grounded Examine all the wiring in the order of its accessibility until the grounded wire is found If the mixer has a radio interference condenser wired between a stator lead and power cord lead remove it from the circuit Examine all the bearings in the order of their accessibility until the frozen bearing is found Check wiring Replace phase control Remove motor brushes and check that they are not worn to less than 5 16 Replace with new brushes if excessively worn Remove and replace armature Check brushes for wear Dissemble and check motor Replace phase control KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid STAND MIXER WIRING DIAGRAM DOMESTIC MODELS WHE TE WHITE 4 1 8 FIELD 8 Adjust these screws equally to 60 R P M at the planetary on Stir Speed If using a digital tachometer at the attachment hub set the reading to 40 64 R P M on Stir Speed Circuit Breaker 5 2 Model KSMC50 Only RED p Bus ontrol Plate BLACK pu RED 3 p trol
33. ll not shut off with switch Bowl not held firmly on pedestal Beater strikes bowl or too much clearance Planetary turns beater does not revolve Mixer runs with a raspy bumpy noise at the planetary Mixer runs with bad vibration rumbling noise and goes to higher speeds Mixer runs on low speed but has no power Mixer has no power on low speed but OK on high speed Repeated worm gear failures MOST LIKELY CAUSE S Open electrical circuit ON OFF switch not correctly adjusted with switch control link Loose clamp disc screws Bent bowl screw cap Adjusting screw on tongue of bottom cover improperly set Pinion gear drive pin broken Bottom cover internal gear teeth worn or broken Faulty governor Bad phase control Bad electrical connections Stir speed improperly set Faulty governor Galled attachment gear Attach hub bearing galled Appendix B 1 WHAT TO DO CHECK Faulty plug Faulty power cord Faulty speed control plate Wire loose from brush holder Bad connection between field and cord Open circuited armature Open circuited field Faulty switch ON OFF Bad phase control Dirty contacts Incorrect brush orientation Check switch control link lever Tighten the screws Replace bowl screw cap If none available bend the four lugs or lips back into position Turn the adjusting screw slightly to right or left to adjust clearance Clearance should be 1 16 R
34. lled If the mixer motor begins to run too fast for a particular speed setting one or both contacts open which cuts back on the voltage the motor sees thus slowing it up If the motor operation becomes too slow one or both contacts will close applying the needed voltage to the motor to sufficiently increase motor speed This is always accomplished through the triac The control plate contacts control the triac and in turn controls the amount of power supplied to the motor BEATER The beater should fit freely on the beater shaft located in the planetary Power is transmitted from the motor to the center bevel gear assembly by means of the worm gear The center bevel gear assembly engages the beater pinion located in the planetary to turn the beater shaft The attachment hub bevel gear also meshes with the center bevel gear assembly to transmit power when various attachments are being used LUBRICATION Under normal service conditions the mixer will not require lubrication for many years The gear case 16 lubricated with an ample supply of Benalene 930 2 grease 6 fluid ounces which lubricates all the gears and shafts GEARCASE LUBRICATION All KitchenAid Stand Mixer Gearcases are lubricated with 6 Fluid Ounces of BENALENE 930 2 GREASE OR EQUIVALENT NOTE Gearcases lubricated with this grease will not require lubrication for years The motor bearing and the beater shaft bearing are oil impregnated The rear
35. loth Fig 76 hooked over the control plate spring will keep the spring accessible not allowing it to snap between the upper and lower gear case become lost Plastic headlock Control plate spring Fig 74 A plastic headlock has been riveted to the pedestal Fig 76 Hold th control plate spring 4 a cloth to retain of international export models An international model is shown locked in the inclined position This is obtained by A After installing new parts in the control unit the action of the spring loaded lock lever used on these the control plate must be adjusted so that all speeds models will be the same as they were when the mixer was new B Make sure that all of the wire leads are properly connected and that they are locked in position properly Plug the cord into a receptacle having the proper voltage C To adjust the speeds move the switch lever to stir This may or may not start the motor If motor did not start turn out the two adjusting screws evenly and stop when planetary turns about 60 revolutions per minute To test the speed hold a finger of the right hand at the planetary Let the beater shaft hit the finger Fig 77 Count the number of times the finger is touched in 15 seconds Adjust the two screws until the shaft touches the finger about 15 times in 15 seconds D When proper speed has been set lock the two lock nuts using a 11 32 wrench Fig 78 and Fig 75 Internation
36. meter shows a low resistance reading the coil is good Check the other coil in the same way If the needle on the ohmmeter deflects to zero or there is no deflection the coil 1s bad and the stator must be replaced D Assemble the two stator studs and tighten them by using long nose pliers Be sure the nose of the pliers is placed on the stator stud in the area that the stator seats so the threads will not be deformed Start the stator on the two stator studs and into the ribs of the motor housing Fig 36 Fig 36 Positioning the stator the two stator studs and into the ribs of the motor housing Page 11 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid The two long leads from the stator must be on the same side as the slot in the motor housing Insert the stator brush clips between the brush holder housing and brush insert A slot is provided in the brush holder housing for Washer this brush clip Insure that the brush clips are pushed in all way so the brush and commutator on the armature will clear them when assembled Bearing Washer E Push the stator back as far as it will go then place the star washers and 10 24 nuts on each stator stud Tighten both nuts Put the long leads from the stator through the slot in the bottom of the motor housing Fig 37 Stator Wires Fig 38 Check the blades of the armature ventilating fan and straighten if bent
37. motor bearing has a felt washer which has been presoaked in oil The front motor bearing in the mixer housing is a ball bearing 2005 KitchenAid SECTION 1 DISASSEMBLY OF THE GEARCASE AND PLANETARY A All solid state KitchenAid mixers have the same motor and control parts and the gears in the gearcase are alike with one exception K45SS units built prior to May 6th 2002 Planetary parts are all the same except that some early production K5SS had a lead weight Gearing and motor instructions are for both tilt head and bowl lift machines and any differences will be pointed out BOWL LIFT Models 555 5 5 5 50 5 50 5 50 KP50 The bowl is raised and lowered into position TILT HEAD Models 4555 KSM45 KSM75 KSM90 KSM103 KSM110 KSM150 KSM151 KSM152 The mixer head is tilted up and down into position Bowl column base and bowl lift details are covered separately in section 7 B Before repairs are attempted on any KitchenAid mixer a wattmeter test should be made To make the test set the wattmeter to the proper voltage Next plug the cord from the mixer into the wattmeter Turn on the current and run the mixer KitchenAid stand mixer shown with a digital wattmeter If the wattmeter shows up to 135 watts going from stir to 10 speed the mixer is in good condition If the wattmeter reading is 175 to 400 watts there is a problem High wattage mixer readings indicate either
38. nd placed on the new bowl support to complete the bowl support repair To remove the bowl spring latch unscrew the two 10 24 x 1 4 screws Replace with new if rusted or broken The function of the bowl spring latch 16 to hold down the rear of the bowl Hold the bowl spring latch on the bowl support and insert the two 10 24 x 1 4 round head screws into the bowl support and tighten Fig 87 Bowl Locating Pin 2005 KitchenAid Fig 95 Two 10 24 x 1 4 screws hold the bowl spring latch in place M Place the column on the bottom cover Fig 85 and screw in the four 5 16 18 x 3 4 round head screws Fig 86 These screws must be tightened to 70 to 90 in Ibs of torque The mixer is now ready for operation N To attach the bowl to the support place the bowl support tabs on the bowl over the locating pins Fig 96 Press down on back of bowl until bowl pin on back of bowl snaps into spring latch 7 Fig 96 Method used to attach bowl to bowl support O To adjust beater to bowl clearance attach the beater to the beater shaft and raise the bowl into the mixing position Beater should be with in 1 16 from bottom of bowl Page 27 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid If not adjust the bowl height by turning the beater height adjusting screw clockwise to decrease the clearance or counter clockwise to increase the bowl to beater clearance Fig 97
39. o that it will clear the hinge bottom cover pin Place the new hinge pin in the pedestal but do Line up the holes for the hinge pin and tap it in so not drive it in that an equal amount of the pin extends on each side of the pedestal Fig 73 B Check the rubber feet If they are worn or softened from grease replace them Twist the old feet out Fig 71 Clean the holes Zn solvent and dry them with a clean cloth Fig 73 Use a rubber or rawhide mallet to tap the hinge pin into the pedestal b 4 Using a flat blade screwdriver tighten the hinge Fig 71 The pedestal feet should be replaced on older mixers set screw up inside of the pedestal Fig 70 Moisten the part of the foot that will go into the hole and twist the new foot in or tap with a mallet Be sure all feet are penetrating the pedestal an equal distance to maintain a level foundation Page 21 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid F On international export models shown Fig 74 SECTION 6 a plastic head lock foot has been riveted to the ADJUSTING THE CONTROL UNIT pedestal to permit the locking of the motor housing in the inclined position The lock lever on these models is spring loaded and the locking action is obtained by removing tension from the lever after the motor housing has been put in the inclined position Fig 74 qu NOTE When replacing a control plate a c
40. op of the worm gear and push the pinion shaft up into the upper bearing Line up the drive pin holes in the shaft and worm gear and drive in the groove pin J Place the worm gear assembly and bearing bracket on the bottom cover so that the two dowels will fit into the base of the bearing bracket Fig 58 y EE Atch Link Le i 1 3 Dowel pin Fig 58 The two dowels must fit into the base of the worm gear bracket Place the three lock washer screw assemblies 1n the holes and screw them into the bottom cover Fig 59 Be sure screws are tight 18 23 in Ibs Lock washer screw assembly Fig 59 Secure the three lock washer screw assemblies into the bottom cover 2005 KitchenAid K Check the latch link and lever assembly There should be no wear or trouble with this assembly Fig 58 L Use 6 oz of Benalene 930 2 lubricant and lubricate around the gears when filling the gear case This product is available through your nearest authorized distributor Try to keep the bearing in the top of the gear case open It will help when assembling the bottom cover and gearcase motor housing together M Clean the gasket surface of the gear case Place a new gasket on the gearcase over the dowel and press it down so it will stay in position N Check the cord and plug If it is drying and cracking Replace it O Lock the latch lever and hold the bottom cover in position over the gearcase motor hous
41. ords have been maintained over a period of years to determine and correct through improved design any troubles that might possibly develop An effort has been made in preparation of this manual to cover them all INDEX KITCHENAID Stand Mixer Service Manual LIT4177310 C GENERAL INFORMATION Normal Performance The KitchenAid Stand Mixer is powered with a universal motor which will operate on 50 or 60 hertz alternating current only The Voltage of the power supply should be within 10 volts either way of the voltage stamped on the mixer trimband and nameplate A mixer in good running condition will start turning slowly when the switch lever is moved from the OFF position to the STIR position As the switch lever is moved to successively higher positions the speed of the beater increases until the 10 speed is reached At stir position the planetary should turn at approximately 60 at the 10 position all models turn at approximately 255 RPM with the exception of K45SS models built before May 6th 2002 WM19 which turn at approximately 280 RPM KITCHENAID STAND MIXER RPM SPEED 4555 OTHER MODELS STIR 60 RPM 60 RPM 10 255 RPM 255 RPM Prior to May 6th 2002 10 280 RPM Note All models have similar RPM except K45SS units built before 6 2002 which run at 280 RPM in the 10 position The mixer will run quietly in the lower speed range however some noise can be expected on the highe
42. r speed settings due to hum of gears and the motor When the mixer is first turned to the stir position there may be a slight clattering irregular noise This noise will disappear as the lubrication in the gearcase warms up The switch lever should move freely with the feel of definite positions for speed numbers stir 2 4 6 8 and 10 Speed numbers 3 5 7 and 9 do not have definite notches Power A mixer will have full power on all speed settings To check for full power carefully hold the planetary with one hand and move the switch lever on and off with the other hand At the stir position it should not be possible to stall the planetary except by a very great effort nor should the planetary slow down noticeably when the retarding pressure is applied 2005 KitchenAid Heating Under normal conditions the mixer will not show any tendency to heat because of the built in ventilating system in the motor Under heavy loads with extended mixing time periods the head may heat up to the point of being uncomfortable to touch Speed Control The speed control of the mixer is attained through the use of a governor assembly mounted at the rear of the control plate assembly The electrical circuit is made and broken by the action of the fly ball governor revolving against the control plate When the switch lever is moved to an ON position the position of the control plate with respect to the governor is changed by t
43. rmature First remove the planetary to check the beater shaft bearing in the planetary If the beater shaft can be easily moved back and forth with a twisting effort it is satisfactory If it binds replace the planetary If it checks okay recheck the mixer without it If the mixer still uses excessive watts it must be disassembled and the other bearings checked Dissemble the motor and replace the armature assembly Bend the fixed contact on the control board until the Stand Mixer Service Manual LIT4177310 C KITCHENAID 2005 KitchenAid PROBLEM SOLVING QUICK REFERENCE GUIDE MIXER PROBLEM Switch lever clicks but mixer will not run or buzz Electrical shock to operator Mixer will not run although switch clicks motor buzzes and smokes Bad sparking at contact points or burned contacts on switch Bad sparking at motor brushes Mixer runs on high speed only MOST LIKELY CAUSE S Open electrical circuit Bare lead touching the inside of the motor housing Frozen bearing Wired wrong Faulty Phase control Worn motor brushes Rough commutator Faulty armature or shorted field Phase control defective Appendix B 3 WHAT TO DO CHECK Progressively disassemble the speed control mechanism plus the motor and perform the following checks until the open circuit is found Look for Faulty plug on power cord Faulty power cord Bad connection in speed control plate Faulty speed control plate Wire
44. surrounding the gears Fig 13 The attachment hub bevel gear being removed from the mixer attachment hub bearing I Clean out the gearcase and remove as much of the grease as possible The gearcase may be thoroughly cleaned when the motor has been removed Page 5 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid SECTION 2 Remove the end seal and disconnect the phase control flag terminals from the control board DISASSEMBLY OF STAND MIXER MOTOR AND CONTROL UNIT Fig 16 Note All service operations discussed here should be performed with the mixer disconnected from the A C mains A Start the disassembly of the control unit by removing the cord flag terminals from the control board and the ground wire from the bearing bracket Fig 14 P ur Fig 16 After removing the end seal remove the phase control flag terminals Unhook the control board spring at the bottom of the control board Fig 17 E E Fig 14 Removal of the cord flag terminals and cord ground wire Remove the motor stator flag terminals from the control board Fig 15 J Fig 17 Unhook the control board spring Unlock the two lock nuts on the control board and unscrew the two adjusting screws The mixer control board can now be removed and Fig 15 The removal of the motor stator flag set aside for later evaluation Fig 18 terminals from
45. the control board Page 6 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid EX Wr qw ue be Fig 20 Phase control or triac shown Fig 18 Mixer housing with end seal and removed in lower center control board removed B The phase control can now be disassembled from the bearing bracket 1f necessary by unscrewing the 4 40 x 1 4 pan head screw Figs 19 amp 20 PF oss TA NE Q ne di ra gt J JN X Bh 7 a h d gt 4 4 Jj 4 2 0 Fig 21 Needle nose plier used to pry governor off the motor shaft M A Fig 19 Removal of the phase control Triac from the bearing bracket C With a pair of needle nose pliers carefully pry off the governor assembly Fig 21 Do NOT bend Remove the governor drive pin and lay it aside so it will not be lost Fig 22 Fig 22 Governor shown removed from the shaft of the motor Page 7 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid D To remove the speed control link and cam assembly take out the pivot screw and tension washer Fig 24 Flat Spring Fig 25 Removing the speed control spring flat spring and the speed control link assembly E Unscrew and remove the two 10 24 nuts Fig 26 Fig 24 The pivot
46. vice Manual LIT4177310 C 2005 KitchenAid P A Fig 10 Removal of the 5 special screws holding the internal gear in the bottom cover n Y 4 w 23 T 2 P 8 LEN 0 0 f 4 s sry Ww Fig 11 The bottom cover is removed after removing the four 10 24 filister head screws To remove the bottom cover from the gearcase motor housing insert a drift punch through the hole in the center shaft and lift while using a screwdriver to break the bottom cover loose Use the slots in the side of the gearcase to do this Fig 12 Do NOT pry in the area of the transmission gasket as this may prevent the gasket from sealing properly upon reassembly The transmission gears will come out with the bottom cover Be careful not to allow any grease to fall into the motor area of the housing ge T haw E 14 e Fig 12 While lifting up on the center shaft use a screw driver to gently pry the bottom cover from the housing H Remove the attachment hub bevel gear from the gearcase motor housing This gear 1s removed by simply pulling it out of the attachment hub Fig 13 The gear will clear the worm of the motor s armature shaft and should be easy to remove Note For clarity the pictures in this manual have no grease shown in the gearcase Normally the gearcase has 6 oz of grease
47. workplace will be dry and sanitary at all times and all units should be inspected for cleanliness before any work is started Visually inspect the unit requiring service in a well luminated area eA mild non abrasive dishwashing soap solution and clean towel be used to wash any unit requiring attention he hands of the service technician should be clean at all times during service procedure ELECTRICAL CONSIDERATIONS Electrical Hazard he workplace for the stand mixer will have properly grounded AC outlets that adhere to all Local Electrical Codes that are applicable at the time of repair he Stand Mixer Power Cord should always be inspected first before testing the mixer operation Do NOT run the mixer if the Power Cord is damaged replace it eAll disassembly and assembly procedures discussed in this manual should be conducted with the unit disconnected from the AC mains NOT leave the unit unattended while running the mixer for speed range and bowl clearance checks Always unplug the unit immediately after concluding these tests Technician he Service Technician should wear Protective Eyewear at all times when conducting a repair on the Stand Mixer eLoose fitting sweaters shirts sleeves or bracelets should NOT be worn while servicing the Stand Mixer SAFETY
48. xer 1s now ready for operation 1 16 between the bowl and beater Page 24 KITCHENAID Stand Mixer Service Manual LIT4177310 C 2005 KitchenAid SECTION 7 m REPAIRS BOWL LIFT ASSEMBLIES rn BOWL LIFT MODELS p The bowl lift models of KitchenAid mixers have a a different type of bowl and are different in size On the tilt head models the bowl is held stationary by mechanical means at the bottom of the mixer pedestal whereas on bowl lift models the bowl support slides up and down gibs on the column 4 a gt 4 B Should the mixer be tipped over or knocked off the table or counter the unit s bowl support assembly may be broken To repair it it will be ee necessary to replace the bowl support Fig 85 Lift the column and bowl support assembly off of the bottom cover C To replace the bowl support remove the four 5 16 18 x 3 4 round Phillips head screws Fig 84 and lift the column and base assembly off the bottom cover Fig 85 KSMC50 models use 5 16 18 x3 4 hex head screws Fig 86 Remove the four round head screws from the base to remove the bowl lift assembly E F 7 BEATER HEIGHT ADJUSTING SCREW Fig 84 Four round Phillips head screws must be removed to replace the bowl support assembly D With the bowl lift assembly on the bench lay it on its back and then remove the four 5 16 18 3 4 round head
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