Clarke FloorCrafter Service Manual
Contents
1. the mainframe 56043144 Page 6 Fig 5 Using a 1 4 20 bolt threaded into the shaft will prevent damage to the shaft surface when removing the shaft 56043144 Page 7 Tensioner Assembly Removal and Disassembly 1 Remove paper tensioning handle 34 2 Remove three tensioner mounting bolts from left side of frame 3 P ull complete tensioner from paper access door side 4 Remove top roller assembly 5 With the tensioner in the compressed position use a C clamp or bar clamp to compress the tensioner spring Fig 6 6 Remove upper link arm bolts 11 7 Release clamp to separate the support 29 and carriage 18 8 Remove Bolt from upper and lower rod ends 24 and 33 9 Remove the draw lever pivot bolt 30 10 Bring the draw lever out through the top of the support Upper roller bearings 1 Remove snap 8 ring from short side of shaft 15 and drive shaft through from this end 2 remove bearings 9 from shaft and roller 3 Press new bearing on long end of shaft using inner race only 4 Install inside bearing in roller Should be a slip fit 5 Press shaft and bearing assembly into the roller and bearing assembly using only the inner race of each bearing use Loctite on the outer races of both bearings Guide roller Bearings Guide rollers are not serviceable and should be replaced as complete assemblies Assembly Hints If replacing the support 29 add or remove spacers 37 as needed If replacing the rod ends 25 mark the cent2. 4 Page 10 Symptom Cause Repair Start No power Check power supply and connections Low voltage from excessive length Locate power source nearer to work site or Motor runs Sluggishly undersize extension cord or poor use a Voltage Booster Check connection connections Defective run capacitor Replace capacitor Defective motor Motor shakes and will not come up to speed Defective start switch SINPAC Switch Replace start switch Uneven cut lines in floor Leveling out of adjustment R eadjust Level Lines running with the direction of sanding Paper tracking out of adjustment Adjust tracking Sanding in wrong direction Sand from left to right Damaged wheel or rear castor pivotrod Replace damaged wheel or pivot rod Chatter Drum damaged or out of round Dress or replace drum Less than 2 inches between marks Excessive buildup of dust in the drum Clean drum Vibration trom damaged or worn bearing or belt Replace worn or damaged bearing or belt Defective sanding paper Replace paper Sub floor loose or not installed properly Repair sub floor Waves Debris on wheels Clean or replace wheels 2 inches or more between marks Flat spot on wheels Replace wheels Sub floor loose or not installed properly Repair sub floor sr Improve smoothness of starting and Excessive stop and start marks Stopping or reduce sanding pressure 56043144 Page 11 Symptom Cause Repair O tracking Tensioner not adj
3. Clarke American Sanders FloorCrafter Belt Sander Service Manual Clarke American Sanders MODELS 07129A 07111A 07117A 07104A 56043144 Page 1 Switch Replacement 1 Remove back cover 24 2 Disconnect inlet and interconnect cord wires from switch 3 Remove switch retaining screws 13 on front of handle 4 Install new switch so that the levers are up in the on position 5 Connect two black wires from the inlet to the lower two switch terminals Fig 1 6 Connect the black and white wires from the interconnect cord to the upper switch terminals Fig 1 7 Replace back cover Assembly Hints The switch should always be installed so that the levers are up when in the on position Inlet Replacement 1 Remove 3 inlet retaining screws 9 on front side of handle 2 Disconnect all three wires from the back of the inlet 3 Connect the wires from the switch and the ground wire to the inlet with switch wires at X and Y and the ground wire to the ground terminal 4 Reinstall the inlet in the housing Assembly Hints Reinstall the inlet with the ground prong in the up position 56043144 Page 2 Drum Pulley Removal 1 Remove the pulley retaining nut 3 2 Use gear puller to remove pulley Assembly Hints Install pulley with the long side of the hub in toward the drum Drum Removal 1 Remove drum cover 4 to reveal the drum retaining nut 3 2 Hold pulley with the two flats on the hub and remove the drum retainin
4. er of the all thread 31 to make sure there Is equal engagement in both rod ends Fig 7 The gap between the rod ends should be approx 3 8 Fig 7 so that the single end on the draw 6 lever just contacts the lower side of the support 29 when compressed Fig 8 and the carriage protrudes through the support approx 1 16 Fig 9 Check to make sure the outer arms of the draw lever 9 are parallel Fig 10 Draw levers prior to 2007 were soft steel and prone to bending Fit between carriage and support must be free but not overly loose Do not use lubricant other than aerosol Teflon on any of the moving parts Machines produced before 2009 do not have the stainless shims in the support or carriage and shims can not be added without replacing the support and carriage Make sure the metal wave washers 14 are installed between the link arms and carriage Fig 11 Upper link arm bolts 11 will break easily if over tightened One to three threads of the tracking adjustment screw 17 exposed through the underside of the Carriage 18 is a rough starting adjustment Fig 12 Rubber boot 39 most be glued to the carriage and wire tied to the support to seal out dust 56043144 Page 8 Fig 6 A clamp should be used to hold the tensioner in the compressed position during disassembly If shaft is not at least flush with the bottom of the casting when compressed it will be difficult to install sanding paper Fig 12 56043144 Fig 7 Center o
5. f rod has been marked to show equal thread engagement in the two rod ends and gap is set at 3 8 as a starting point Fig 11 Washer must be in place to prevent the shoulder bolt from compressing into to aluminum carriage Page 9 Testing the Capacitors 1 Disconnect all wires from the capacitor to be tested 2 With an insulated screwdriver short the terminals on the capacitor together to discharge it 3 With a multimeter set to the ohm setting attach one probe to each terminal Fig 14 If the Capacitor Is good the needle should move up momentarily and then fall back to zero You can repeat the test by reversing the leads on the terminals If the needle does not move or moves up and does not fall back the capacitor is defective Testing the electronic start switch SINPAC With a multimeter set to the ohm setting check the resistance between terminal 2 and 3 If the resistance is less than 500K the switch has been shorted and must be replaced It s possible for a defective start switch to pass this test and still not function but further testing requires specialty tooling If the start switch passes this test and the motor shakes and will not come up to speed the start switch is most likely defective POWER CABLE ASSEMBLY HANDLE ASSEMBLY MOTOR ASSEMBLY CIRCUIT BREAKER MOTOR RUIN CAPACITOR START ko CAPFMSGITOS tl 2 3 START toh CAPACITOR N i I ER EG y START SWITCH 7 STH 5604314
6. from the left side 3 Press shaft out from the pulley end 4 Remove bearings from shaft and carrier Reassembly 1 Press the outer bearing 35 in the carrier using the outer race only 2 Press the inner bearing 31 on the arbor shaft 32 using the inner race only 3 Press the shaft and inner bearing assembly into the carrier assembly by pressing on both races of the inner bearing while supporting both races of the outer bearing Assembly Hints Use Loctite on the outer races of both bearings Fig 2 Specialty drum pullers are A two or three jaw gear Felt seals part 30675A are available for removing the puller can be used to remove used to prevent dust build up drum the drum in the drum Machines produced prior to July 2005 do not have the seals but they can easily be added 56043144 Page 4 Fan Assembly Removal and Repair 1 Remove belt guard 2 Remove three fan assembly retaining bolts 28 3 Remove complete fan assembly 4 Remove the pulley retaining nut 24 5 Pulley should pry off 6 Remove fan retaining nut 6 Left hand threaded 7 Fan should pry off 8 Remove both keys and spacer 9 Press fan shaft 35 out from pulley side 10 Remove bearings from shaft and housing Reassembly 1 Press the 902567 smaller bearing on the fan end of shaft using the inner race only 2 Press the 51111A larger bearing into the pulley side of the housing and install the retaining ring 3 Press the shaft and bearing assembly into the housing and bear
7. g nut 3 Pull drum using a specialty drum puller Fig 2 or gear puller Fig 3 utilizing the vent holes in the end of the drum Do not push the drum off by prying from the back This will damage the rubber and cause it to separate from the core Assembly Hints It is easier to push the drum on the shaft and then install the key rather than installing the key in the shaft and pushing the drum over it Always turn the drum retaining washer 2 over when reinstalling it Be sure felt seals are installed in the inside of the drum to prevent dust build up which will cause vibration leading to chatter Fig 4 When installing a new drum the drum must be trued or dressed to match it to the machine Drum truing or dressing 1 Glue or tape a piece of 80 or 100 grit paper to a very flat surface Use a thick piece of metal ora granite surface plate if possible 2 Position the machine so that all wheels are on the flat surface and the drum Is over the paper 3 Slowly lower the drum to the paper while holding the feathering handle to allow only a small amount of pressure between the drum and paper 4 Hold the machine steady in this position for 10 to 30 seconds and then use a compressor to blow out the loose rubber before cooling Repeat the process if necessary to prevent chatter or vibration when sanding 56043144 Page 3 Arbor and Bearings assembly 1 Remove arbor retaining bolts 36 located behind the drum pulley 2 Pull assembly out of the frame
8. ing assembly using the inner and outer race of the fan bearing while supporting the inner race of the pulley side bearing 4 Reinstall fan and pulley Assembly Hints Fan spacer Is installed with the wide flange toward the fan The pulley is installed with the long hub side toward the bearing The fan and pulley keys are interchangeable Fan retaining nut is left hand threaded lf the fan doesn t spin freely after assembly gently tap each end of the shaft to free the bearings 56043144 Page 5 Truck Assembly Removal 1 Remove drum pressure lever 13 and spring 14 2 With the machine lying on the access door side loosen the two set screws 52 in the bottom of the truck frame 3 Disconnect the drum control rod assembly 3 from the truck frame 55 4 Screw a 1 4 20 bolt into the left end of the shaft 58 and pull shaft out Fig 5 Assembly Hints Both the rubber 63 and metal 45 spacer go between the truck frame and leveling bracket If the eye bolt 40 is removed from the truck frame be sure to measure the threads for reassembly The tension spring 14 is installed with the short end connected to the drum pressure lever Truck Wheels Truck wheels 51 can be removed amp replaced without removing the truck frame Rear Caster assembly Rear caster and pivot axle assembly can be removed by removing the nut below the handle base 17 or the lower assembly only can be removed by removing the lower nut 27 leaving the pivot axle in
9. usted properly Adjust tensioner ee If machine has been ran with the paper untensioned there will be noticeable paper cut marks on the upper rod end Fig 13 Tension paper Excessive buildup of dust around tensioner Clean tensioner Worn upper roller or guide roller Replace worn roller Draw lever damaged bent Replace draw lever Excessive play between the peolace ensonerassenby upper Carriage and support Replace tensioner assembly Poor dust pick up Shake debris from bag and wash or replace Dust bag Is dirty bag Dust shoe is improperly adjusted Readjust dust shoe Dust chute Is obstructed Remove dust shoe and clear throat Fan belt loose worn or damaged Tighten or replace fan belt 56043144 Page 12 Clarke American Sanders 14600 21st Avenue North Plymouth MN 55447 3408 www clarkeus com Phone 800 253 0367 Fax 800 825 2753 2010 Nilfisk Advance Inc A Nilfisk Advance Brand
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