"service manual"
Contents
1. Upper Inlet part with Retai amp Seal Ring End Combination X NOTES 1 If an impeller is to be permanently removed pump destaged the thickness of the impeller back plate hub area must be compensated for Use a longer spacer or combination of spacers that equal the thickness of back plate hub area material Substitute E for D when destaging by 1 impeller 2 Since proper reassembly of the impeller stages must be done upside down this chart has been arranged that way for your convenience Impeller eyelet opening faces upward away from vise 6 GRUNDFOS X See Note 1 Straps 69a Spacing Pipe 61 Stop Spacer Tea reassembly on th Reassembly Procedures CR CRI CRN 10 15 20 Order of Stage Assembly Models CR CRN 10 Low NPSH Legend 49 Impeller 49i Impeller Impeller 64d Lock Washer Low NPSH Spacing Pipe a Top 47a W X A 4b Bearing Ring A4 y 4 Co oe Impeller Clam a p Chamber Chamber Vane 69 64b i 64e 64 Spacing Pipe Spacing Pipe Spacing Pipe i Spacing Pipe 6 Stop Spacer Part Combination A Part Combination B Part Combination B Part Combination C Part Combination D Nameplate number of impellers o a a a Ne f 9 10 4 6 7 8 2 22 l l Bottom chamber Vane Slotted for Straps Inlet Part Lower 26b 69a Spacing Bush 61 Stop Spacer Part Combination E 44c Inlet Part Upper End Combination X NOTES 1 Ifan impeller is to be permanently2. 45 41a 49 51 55 60 amp 60a 64 64a 64c 66 66b 69 67 66 37a 38 68 100 102 109a amp b 105 amp 105b 79b 8 GRUNDFOos Minimum Operating Condition Excessive pitting of these castings could cause leaks Rusted castings should have all seating areas cleaned to ensure proper seating of O rings Same as for impellers The maximum inside diameter for the bearing in position 4a SIC is 23 55 Bronze amp Graflon is 22 02 mm If a groove can be seen or felt the chamber should be replaced Should be free of visible wear on the inside edges Inside diameter for CR10 44 01 to 45 04 Inside diameter for CR15 amp 20 59 84 to 60 02 Minimum outside diameter SIC is 23 4 mm TC is 21 874 mm If a groove can be seen or felt the bearing should be replaced Should be free from physical markings except for the guide vane welds The eyelet or contact surface for the Neck Ring should not show any signs of wear If worn replace impeller on CR CRI CRN10 or Wear Ring only on CR CRI CRN 15 and 20 1 Cavitation the implosion of vapor bubbles within the impeller stack Make sure the Net Positive Suction Head Available for the pump meets the minimum Net Positive Suction Head Required for the pump when running at the required flow 2 Improper coupling height If the coupling is not set to the proper height see steps 29 to 31 of the Reassembly procedures the impellers are not suspended as they
3. NOTE Cool Top models require two sets of four Stack Compression Springs The PTFE will always be placed in the lower Hot section of pump to press against the stack assembly Pos 80 Replace any Seal Ring Pos 45 in the Chambers Pos 4 4a and 5a Inner edge must face downward see diagram Snap Seal Ring Retainer Pos 65 into place The retainer should not spin on the chamber and the seal ring should move freely from side to side 4 CR CRI CRN 15 amp 20 ONLY Press new Wear Ring Pos 49c onto Impeller Pos 49a CR CRI CRN use new Impellers if eyelet of Impeller is worn With Shaft Pin Pos 10 inserted into the Shaft Pos 51 place shaft into Shaft Holder material OOSVO040 The reassembly procedures from this point will depend on the type of pump and the number of stages it contains Refer to diagrams on pages 16 21to determine the proper sequence of impellers Pos 49 or 49a Chambers Pos 4 4a Spacers Pos 64 a c d and Bearing Ring Pos 47a needed for the pump you are working with Reassemblethese stages inthe ordershown beginning with the highest number stage and continue to the first stage Then continue Before reusing the original Shaft Pos 51 use a light grit emery cloth to smooth away old set screw marks as these can cut the O rings in the seal assembly Place the Clamp Spacer Pos 64c onto the shaft GRUNDFOS 9 Reassembly Procedures CR CRI CR
4. care while sliding lowering completed Back to Back Pump Head Cover into place Firmly seat over sleeve If it does not freely seat onto sleeve STOP Remove the Pump Head Cover turn over remove sleeve O ring and stretch Reinstall replace O ring into Pump Head Cover then reinstall onto Shaft and sleeve Do not tighten the three 2 5 mm set screws at this time This will be done in step 30 Proceed to step 22 Position the plugs to the desired location Lower the completed Pump Head Assembly Pos 77a over the shaft and seat onthe Sleeve Pos 55 Ifit does not freely seat onto the sleeve STOP Remove the pump head and turn over Remove sleeve O ring and stretch Replace and reinstall the pump head onto shaft and sleeve Pushdown onthe coller area of the Seal then lift Shaft to create a clearance of 123 mm from the top of the Shaft Pos 51 to the top of the Shaft Seal Tighten the three 2 5 mm set screws to 2 ft lbs 2 5 Nm Proceed to step 22 Reassembly Procedures CR CRI CRN 10 15 20 Tandem Seal Slide the Inboard Seal Pos 105b down the shaft and thread into the pump head Use specialty tool 00SV2107 a 41 mm Deep Socket or an Open Ring Spanner to torque the Inboard Seal to 26 ft lbs 35 Nm Alternative to Step 21 An alternative to step 21 is when the special tool OOSV2078 and two 27 5 mm Spacers 96491537 are used with two Staybolt Nuts and Washers Place tool over Staybolts and seat against Pu
5. removed pump destaged the thickness of the impeller back plate hub area must be compensated for Use a longer spacer or combination of spacers that equal the thickness of back plate hub area material Substitute E for D when destaging by 1 impeller 2 Since proper reassembly of the impeller stages must be done upside down this chart has been arranged that way for your convenience Impeller eyelet opening faces upward away from vise Tesi reassembly on this end 3 Because the low NPSH chamber and impeller are twice the thickness of a standard chamber it has the performance of two impellers Physically there is one less chamber in a stack than the number of stages listed on the pump label example CR10 22 only has 21 chambers and impellers GRUNDFOS v Reassembly Procedures CR CRI CRN 10 15 20 Order of Stage Assembly Models CRN 10 SF Flipped Stack Legend 0 67 Nut 66 Lock Washer 64c Clamp 41a Bearing Ring 64a Spacing Pipe 4c Lower 49 Impeller 64d Spacing Pipe 4la Bearing Ring 4a Chamber with Bearing 49 Impeller 4 Chamber 64 Spacing Pipe Bb 44b 49 Impeller 44a Inlet Part Upper Inlet Part 69 Spacing Pipe Chamber with 64a 61 Bearing Spacing Pipe Stop Spacer Part Combination A Part Combination B Part Combination B Part Combination C Part Combination D p Numper of impellers Sy 17 21 he ages Bottom
6. should be causing them to rub against the chambers causing wear Smooth area at the top of shaft should be free of fitting grooves Spline should not be worn Should not be pitted or cracked Should not be reused replace Should show no signs of gouging or wear at bottom or top Should not be reused replace Should not be reused replace Should be soft and pliable with no visible scars Since they are easily damaged and fairly inexpensive it is recommended they be replaced whenever the pump is disassembled Seals cannot be disassembled should be replaced when repairing rebuilding the pump If bushing is scored replace Bushing If the inner bore of Disk is damaged replace Disk TJ amp Refer to the Parts List and Kits section for a list of material numbers and spare pare kits JN Reassembly Procedures CR CRI CRN 10 15 20 Place Sleeve O ring Pos 37 into recessed area of the Motor Stool Pos 2 for CR models or into the Pump Head Pos 77 for CRI CRN models Install Sleeve O ring Pos 37b into Pump Head Cover Pos 77a for CRI CRN Cool Top Back to Back Seal Tandem Seal models Install O ring into Suction Discharge Pump Housing Pos 6 Note specialty O ring Pos 37b will always be installed in the lower Hot section of the pump of Cool Top models Also install Stack Compression Springs Pos 60 for CR CRI CRN into Motor Stool or Pump Head Cover
7. 77a Light blows with a rubber 41 mm Deep Socket loosen and unscrew the Shaft Seal mallet may be required to loosen assembly Remove the Sleeve O Ring Pos 37 and the PTFE Stack Compression Springs Pos 60 from the Pump Head Cover Pos 77a To continue proceed to step 23 4 GRUNDFOS X Dismantling Procedures CR CRI CRN 10 15 20 Tandem Seal Loosen approximately 1 2 to 1 turn the three 2 5 mm Set Screws Pos 113 of the Inboard Seal Pos 105b Use specialty tool O0SV2107 a 41 mm Deep Socket or an Open Ring Spanner to loosen i a lili Remove the Pump Head Cover Finish removal of Shaft Seal Pos 105b Pos 77a Light blows with a rubber from Pump Head Cover Pos 77a Flip mallet may be required to loosen the Pump Head Cover over and go to assembly step 22 Remove the Sleeve O Ring Pos 37 and the PTFE Stack Compression Springs Pos 60 from the Pump Head Cover Pos 77a To continue proceed to step 23 GRUNDFOS 5 Dismantling Procedures CR CRI CRN 10 15 20 Place the Holder for Shaft OOSVO04O in a vise With the shaft pin inserted into the shaft place the impeller stack into the shaft holder Tighten vise Using a 13 mm wrench remove the Chamber Stack Strap Bolt Pos 26b Washer Pos 26c and Strap Pos 26a Grabthe shaft andlift impellerstack out of the pump If it is stuck a light blow with a rubber mallet may be needed to jolt the stack free 1 Rem
8. GRUNDFOS CR SERVICE MANUAL CR CRI CRN 101520 Dismantling amp Reassembly CONTENTS Dismantling Procedures When Should A Part Be Replaced ssecesssessenceneneseensseenees Page 8 Reassembly Procedures Setting The Coupling Height Order of Stage Assembly CR CRI CRN 10 Order of Stage Assembly CR CRI CRN Low NPSH 10 Order of Stage Assembly CRNE 10 SF Order of Stage Assembly CR CRI CRN 15 20 Order of Stage Assembly CR CRN Low NPSH 15 20 Order of Stage Assembly CRN15 20 SF TORQUES Position Number 7a Coupling Guard Screw 1 5 ft lbs 2 Nm 9 Coupling Hex Screw 5mm M6 Screw 10 ft lbs 13 Nm 6 mm M8 Screw 23 ft Ibs 31 Nm 8 mm M10 Screw 46 ft lbs 62 Nm Strap Bolt 13 mm M8 x 25mm 11 ft lbs 15 Nm Motor Bolt 9 16 UNC 3 8 Bolt 10 ft lbs 13 Nm 3 4 UNC 1 2 Bolt 23 ft lbs 31 Nm Staybolt Nut 59 ft lbs 80 Nm 74 ft lbs 100 Nm Shaft Lock Nut 16 3 ft lbs 22 Nm Shaft Seal 41mm Nut 26 ft lbs 35 Nm 2 5mm Set Screw 2 ft lbs 2 5 Nm innovate GRUNDFOS X Dismantling Procedures CR CRI CRN 10 15 20 These instructions cover the complete dismantling and repair of the pump after the pump has been isolated from the system Before removing the pump from the system make sure all valves are closed Relieve any built up pressure by opening the vent plug screw The power source should be turned off and locked out before starting any work Removal of field wiring to the motor wires
9. N 10 15 20 The Lock Washers Pos 66 come as a set If they become separated it is important the Lubricate the threaded end of the washers are repositioned correctly as noted in the diagram The tabs should interlock shaft with an FDA approved lubricant while the serrated edges both point outward Place the washers onto the shaft Thread the Lock Nut Pos 67 onto the shaft and torque to 16 3 ft Ilbs 22 Nm Use 13 mm Socket 00SV0091 Ratchet OOSVO295 Torque Wrench OOSV0269 Place Suction Inlet Connector Pos 44a amp b onto Stack Insert Straps Pos 26a into slot in Top Chamber Pos 3 Place Washers Pos 26c and Strap Bolt Pos 26b on into the Straps using a 13 mm Socket OOSV0091 and Torque Wrench 00SV0292 with Ratchet OOSV0295 to Torque Bolt to 11 ft Ibs 15 Nm Lower new Stack Kit Pos 80 into the Spray soapy water onthe Sleeve O rings Pump Housing Make sure it seats fully Pos 37 Then lower and press Sleeve into the machined recess Chamber Pos 55 firmly into place Straps must be located as pictured 90 from suction discharge ports Standard CR CRI CRN models skip to step 22 Cool Top models skip to step 13 Back to Back Seal models skip to step 17 Tandem Seal models skip to step 19 10 GRUNDFos If Bushing Pos 79b was removed from Disk Plate Pos 79a use a Punch 00SV2127 to install Bushing and Retaining Washer Pos 79c into Disc Plate Position the plugs to the desi
10. RE AE NOTES 1 Ifan impeller is to be permanently removed pump destaged the thickness of the impeller back plate hub area must be compensated for Use a longer spacer or combination of spacers that equal the thickness of back plate hub area material Begin reassembly on this end 2 Since proper reassembly of the impeller stages must be done upside down this chart has been arranged that way for your convenience Impeller eyelet opening faces downward toward vise 8 GRUNDFOS Reassembly Procedures CR CRI CRN 10 15 20 Order of Stage Assembly Models CR CRI CRN 15 amp 20 49 49 67 j Impeller j Impeller 49 Nut Impeller Be 64d 64d Spacing Pipe Spacing Pipe Lock Washer poner ne oe en 67 Lock Nut 4la 4la pee _ Bearing Ring _ Bearing Ring ya 64c E a N a ie Sse y Chamber CPL Clamp i D 4a Pa 4a gt j Y Chamber with Y Chamber with Bearing Bearing 66 Star Washer 64c Clamp 64d 5 Spacing Pipe porno 64a 64f Spacing Pipe Spacing Pipe Spacing Pipe Part Combination A Part Combination A Part Combination B Part Combination B Part Combination C Number of impellers eH 1 2 3 4 5 6 7 8 9 10 12 14 17 remem Bottom chamber 49 Impeler Top Chamber o D without Guide 2 Vanes Slotted 3 for Straps y Top Chamber with Guide 69a Vanes 2 Spacing Pipe 69 Spacing Pipe a Spacer 61 Stop Spacer Part Combination D Part Combination E X eb NOTES Strap B
11. a 2 5 mm allen wrench through one of the lower shaft Seal Collar is vent port holes and torque the lower inboard seal securing screws to 2 0 ft Ibs 2 5 resting on the tool Nm Remove allen wrench and replace plugs Pos 23a into the Pump Head Cover Pos fe Tighten and torque 77a Remove only one Spacer Then tighten and torque the Coupling bolts to values in em the Coupling bolts step 29 Pe to values in step 29 Remove Spacer Tool then spin the shaft by hand proceed only ifthe shaft spins freely If the shaft does not spin freely l THE PUMP IS NOW Stop and start over inspecting the E components for any cause of binding B COMPLETELY ASSEMBLED Open the isolation valves in the system to fully vent and fill the pump Restore power supply Installthe Coupling Guards Pos 7 and the Screws Pos 7a Using a Torque Screwdriver with a slotted or a TORX tip T20 torque to 1 5 ft lbs or 2 Nm Place Shaft Seal Spacer tool s on to Coupling Guard s GRUNDFOS X Reassembly Procedures CR CRI CRN 10 15 20 Order of Stage Assembly Models CR CRI CRN 10 Legend C 49 Impeller 67 Lock Nut 64d Spacing Pipe 66 Ala Star Washer Bearing Ring a ya Chamber CPL yY Chambe r with Bearing 69 64 Spacing Pipe Spacing Pipe 61 so Pipe Stop Spacer Part Combination A Part Combination B Part Combination C Part Combination D Number of impellers 44b ower Inlet Part
12. art Combination B rar une oS Stages Bottom chamber 49 Impeller aa Top Chamber T _ X without Guide Vanes 3 Slotted for Straps SY Top Chamber with Guide Vanes 69a Spacing Pipe 61 Spacing Pipe ee Stop Spacer 61 Stop Spacer Part Combination D Part Combination E NOTES iab 1 If an impeller is to be permanently removed pump destaged the Strap Bolt thickness of the impeller back plate hub area must be compensated for Use a longer spacer or combination of spacers that equal the thickness of back plate hub area material 26c Strap Washer 44b Lower Inlet Part Substitute E for D when destaging by 1 impeller 26a 2 Since proper reassembly of the impeller stages must be done upside down this chart has been arranged that way for your convenience Impeller eyelet opening faces upward away from vise 44 i leper Inlet part 3 HM Hard Metal Tungsten Carbide with Retainer l amp Seal Ring 4 SiC Sintered Silicon Carbide End Combination X 2 GRUNDFOS X Reassembly Procedures CR CRI CRN 10 15 20 Order of Stage Assembly Models CRN 15 amp 20 SF Flipped Stack Legend 67 Nut 66 ie Impeller Impeller Lock Washer 49 P 64d Impeller 64c Clamp Spacing Pipe 6 44a S Inlet Part Ala j ENES Upper Ala i Bearing Ring Bearing Ring Chamber x 44b 64a f a i Ag 4 gt Spacing Pipe SS Chamber a A Inle
13. e If the pump is a standard unit skip to Dismantling step 23 e For Cool Top type equipped pumps see Dismantling steps 9 to 13 e Pumps built with a Back to Back Seal see Dismantling steps 14 to 17 e Pumps built with Tandem Quench Seal see Dismantling steps 18 to 22 Dismantling Procedures CR CRI CRN 10 15 20 Cool Top Cool Top Remove the Cool Top assembly Pump gt Before removing the Disk Plate Pos 79a Head Cover Pos 77a Light blows with from the Pump Head Pos 77 inspect a rubber mallet may be required to the Bushing Pos 79b If worn usea Flat loosen assembly Blade Punch or Special Punch 0OSV2127 and a mallet to drive out the Bushing Remove the Disk Plate Pos 79a and a Mallet to drive out Remove the O ring Pos 37c amp 109a Remove Sleeve O ring Pos 37 from the pump Head Cover Pos 77a Then remove the from the Disk Plate Pos 79a PTFE Stack Compression Springs Pos 60a from the Pump Head Cover To continue proceed to step 23 GRUNDFos 3 Dismantling Procedures CR CRI CRN 10 15 20 Back to Back Seal F View from a cutaway pump Loosen and remove the plug to allow access to Shaft Seal securing screw Insert a 2 5mm allen wrench to loosen approximately 1 2 to 1 turn the three Set Screws Pos 113 of the Inboard Seal Pos 105b Remove the Pump Head Cover Flip the Pump Head Cover over to remove Shaft Seal Pos 105b Using O0SV2107 or Pos
14. llen Screws torque to 2 ft lbs or 2 5 Nm 9 s a g f l A i u gt Lower motor onto Motor Stool and or Spacer Pos 1 then install and tighten Motor Bolts Pos 28 diagonally to the proper torque M aA Place the Shaft Pin Pos 10 into the Shaft Pos 51 17 ft lbs or 23 Nm for UNC 3 8 bolts 9 16 Head and 30 ft lbs or 40 Nm for UNC 1 2 bolts 3 4 Head 4 GRUNDFOsS Reassembly Procedures CR CRI CRN 10 15 20 Standard Units and Cool Top wT CORRECT Top View Gap between coupling A T OE Using a screwdriver lift the Shaft upward tts ih Insert Shaft Seal Spacer tool between S Shaft Seal Collar and Hex Nut Remove Install Coupling Halves Pos 10a Spray the screwdriver and tighten and torque the alight machinery oil onto the Coupling Coupling Bolts Bolts Pos 9 Install loosely into the 5 mm M6 to 10 ft lbs or 13 Nm Couplings 6 mm M8 to 23 ft Ibs or 31 Nm 8 mm M10 to 46 ft lbs or 62 Nm Ensure the gap between the two Coupling CORRECT Peen Halves are even see Diagram gt Back to Back Seal 31 Tandem Seal RAS Springtensionfrom the seals may have already lifted the Shaft upward If not lift the Shaft I upward At this time insert the Shaft Seal Spacer tool Remove the screwdriver Ensure theShafthasmoved Using a screwdriver lift the Shaft upward Insert two of the Spacer tools between downward and Shaft Seal Collar and Hex Nut Insert
15. may be required Color coding or numbering the wires will aid in reinstallation Remove Coupling Halves Insert a slotted Screwdriver in Coupling gap and twist to free Coupling Half Remove the cartridge Shaft Seal Pos 105 by Using a slotted Screwdriver or TORX tip T20 remove Coupling Guard Screws Pos 7a Then remove the Coupling Guards Pos 7 To free remove remaining Coupling Half Strike Coupling Half with a rubber mallet on upper edge Remove shaft pin Pos 10 NOTE If you have multiple pumps do not interchange coupling components they are a matched set Loosening the three 2 5 mm Shaft Seal Securing Allen Screws Pos 113 approximately 1 2 to 1 turn Using 00SV2107 or a 41 mm deep socket fully unscrew the Shaft Seal from the Motor Stool Pos 2 or Pump Head Pos 77 on I and N models Sliding the Shaft Seal up and off the Shaft Pos 51 For Shaft Seal replacement only go to Reassembly step 24 For full dismantling continue to step 7 2 GRUNDFOS X Remove the four 24 mm Staybolt Nuts Pos 36 and Washers Pos 66a Remove the 5 6 or 8 mm Hex Head Coupling Bolts Pos 9 from the Coupling Halves Pos 10a Remove the 9 16 Head UNC 3 8 or 3 4 Head UNC 1 2 Motor Bolts Pos 28 and lift the motor off the Motor Stool Pos 2 Remove the Motor Stool Pos 2 and Pump Head Pos 77 on land N models Light upward blows with a rubber mallet may be required
16. mp Head Assembly Pos 77a Slide 27 mm Spacers down Staybolts Place Washers and Nuts onto Staybolts and tighten diagonally to CR CRI 59 ft lbs or 80 Nm CRN 74 ft lbs or 100 Nm Push Shaft down then tighten the three 2 5 mm Set Screws to 2 ft Ibs 2 5 Nm Remove Staybolt Nuts Washers 27 mm Spacers and tool OO0SV2078 Proceed to step 22 GRUNDFOsS 2 Reassembly Procedures CR CRI CRN 10 15 20 Spray soapy water on the Sleeve O rings Pos 37 in the Motor Stool or CRI CRN Pump Head Then lower and fully press in place Pushing down on Shaft Seal collar do not push down on Hex Nut Place the Washers Pos 66a over the Staybolts Pos 26 Then lubricate with a light oil Place the 24 mm Staybolt Nuts Pos 36 onto Staybolts and tighten diagonally to CR CRI 59 ft lbs or 80 Nm CRN 74 ft lbs or 100 Nm gt S E e 4 m HS 9 LORE a es Lear ee A Spray soapy water onto the Seal O ring Seating Surface of the Pump Head and the Shaft Pos 51 If reusing original Shaft be sure to use Emery tool provided with Seal Kit to remove any burrs on the Shaft Then spray with soapy water lower the new Shaft Seal Pos 105 over the Shaft Use specialty tool 00SV2107 a 41 mm Deep Socket or an Open Ring Spanner to tighten to 26 ft Ibs or 35 Nm Push the Shaft all the way down for Tandem Seal models you must continue to apply downward force then tighten the three 2 5 mm Shaft Seal Securing A
17. olt 1 Ifan impeller is to be permanently removed pump i 26c dais destaged the thickness of the impeller back plate 7 Strap Washer iowa hub area must be compensated for Use a longer 2 CN Inlet Part spacer or combination of spacers that equal the D thickness of back plate hub area material 26a Substitute E for D when destaging by 1 impeller Strap 2 Since proper reassembly of the impeller stages Ada must be done upside down this chart has been Upper Inlet part arranged that way for your convenience Impeller with Retainer amp Seal Ring eyelet opening faces upward away from vise End Combination X GRUNDFOsS 19 Reassembly Procedures CR CRI CRN 10 15 20 Order of Stage Assembly Models CR CRI CRN 15 amp 20 low NPSH Legend A 67 A Nut Nut 66 67 66 nes Impeller Nut Lock Washer ae NPSH Impeller Lock Washer 66 64c 64b 64c Lock Washer Clamp ing Pi Spacing Pipe Clamp S 64e TN 64c Spacing Pipe Ala Clamp Bearing Ring SiC 64d Spacing Pipe 4la Bearing Ring SiC 64e 64b Spacing Pipe 64b Spacing Pipe Spacing Pipe 4la Bearing Ring HM 64e Spacing Pipe Spacing Pipe yy 4a Chamber with Bearing W 4a Chamber with 4 a Bearing Bearing Ring HM O9 41a 64e Bearing Ring HM 64a Spacing Pipe T Spacing Pipe 64a Spacing Pipe Part Combination A Part Combination A P
18. ove the Suction Inlet Connector NOTE This may come apart in two pieces Using a13 mm wrench removethe Shaft Lock Nut Pos 67 Lock Washer Pos 66 and Splined Spacer Pos 64c Lift the Impeller Pos 49a off the shaft If it comes off freely proceed to step 29 If it is stuck and cannot be removed by 44b hand proceed to step 28 Pos 44a amp Move the shaft into a hole of the shaft holder through which it can pass freely Screw the Punch for Dismantling Shaft material 00SV0234 ontothethreaded section of shaft Using a hammer drive punch down past the hub of the first impeller Noting chart instructions in step 30 remove each impeller Pos 49a and Chamber with bearing Pos 4a and Chamber Pos 4 Repeat these steps until you get down Remove the Chamber with bearing Pos to the last impeller At that time gently knock the punch down through the hub area make sure to catch the shaft as it falls free Go to step 31 6 GRUNDFOS X 4a or Chamber Pos 4 If it is stuck to the rest of the stack pry it loose by inserting a screwdriver between the chambers The dismantling procedures from this point will depend on the type of pump and number of stages it contains Beginning on page 16 refertothechartsinthe Reassembly Procedures to determine what you can expect with the pump you are working on Remove all the Bearing Rings Pos 47a and Spacers Pos 64a c d you encounter while repea
19. red location lowerthe completed Cool Top Pump Head Assembly Pos 77a overthe Shaft and seat on the Sleeve Pos 55 If it does not freely seat onto the Sleeve STOP Remove the Pump Head and turn over Remove sleeve O ring and stretch Replace and reinstall the Pump Head onto Shaft and Sleeve Skip to step 22 Reassembly Procedures CR CRI CRN 10 15 20 Cool Top Place O rings Pos 109a amp 37c onto the Disk Plate Pos 79a Do not roll the O rings they should be stretched over and released into place to prevent cutting the material during installation into the housing Spray soapy solution onto O rings and housing Press the plate firmly in place Before proceeding to step 16 flip the Pump Head over make sure the PTFE Stack Compression Springs Pos 60a and the Sleeve O ring Pos 37b have been installed from step 1 If they have not been installed follow the instructions in step 1 page 9 then proceed to step 16 GRUNDFOS n Reassembly Procedures CR CRI CRN 10 15 20 Back to Back Seal Insert Inboard Seal Pos 105b into the bottom side of the prepped Pump Head Cover Pos 77a Using the specialty tool O0OSV2107 or a 41 mm Deep Socket tighten torque seal the 26 ft lbs 35Nm NOTE If Pump Head Cover has not yet been prepped with PTFE Stack Compression Springs Pos 60 and Sleeve O Ring Pos 37 as previously instructed in step 1 page 9 do so now 2 GRUNDFos Use
20. t Part j wiin Beating Spacing Pipe 69 Lower Spacing Pipe Chamber with 64a i Bearing Spacing Pipe pai Part Combination A Part Combination B Part Combination B Part Combination C Part Combination D umber of mpe e Bottom chamber Begin reassembly on this end lt l NOTES 1 If an impeller is to be permanently removed pump destaged the thickness of the impeller back plate hub area must be compensated for Use a longer spacer or combination of spacers that equal the thickness of back plate hub area material 2 Since proper reassembly of the impeller stages must be done upside down this chart has been arranged that way for your convenience Impeller eyelet opening faces downward toward vise GRUNDFOos n be think innovate SM DRC 136 0113 The name Grundfos the Grundfos logo and be think innovate are registered trademarks owned by Grundfos Holding A S Denmark All rights reserved worldwide Copyright Grundfos Holding A S GRUNDFOS Pumps Corporation GRUNDFOS Canada Inc Bombas GRUNDFOS de Mexico S A de CV 17100 W 118th Terrace 2941 Brighton Road Boulevard TLC No 15 Olathe Kansas 66062 Oakville Ontario L6H 6C9 Canada Parque Industrial Stiva Aeropuerto Phone 913 227 3400 Phone 905 829 9533 Apodaca N L Mexico 66600 Fax 913 227 3500 Fax 905 829 9512 Phone 52 81 8144 4000 V www grundfos us E T G G RU N D FOS 8A
21. ting steps 27 29 Continue until you remove the last impeller Remove the shaft and examine for damage At that point continue Remove the four Stack Compression Springs Pos 60 from the Motor Stool Pos 2 or Pump Head Pos 22 Dismantling Procedures CR CRI CRN 10 15 20 To remove Seal Ring Pos 45 insert a slotted screwdriver in relief slot of Seal Ring Retainer Pos 65 and twist or use Puller OOSV0239 Remove Sleeve O rings Pos 37 in the Motor Stool Pos 2 or Pump Head Pos 77 and the Pump Housing Pos 6 If the unit leaked around the Sleeve Pos 55 removal of the Sleeve may be required Grip Staybolts Pos 26 diagonally Using your thumbs press against the Sleeve to release it from the Pump Housing Pos 6 Lift off sleeve Rocking or light upward blows with a rubber mallet may be required Wear Rings Pos 49c can be removed on CR CRI CRN15and 20 models Impellers Pos 49a use Puller 0OOSV2091 and Support 0OSV0043 to work Wear Ring off of impeller THE PUMP IS NOW COMPLETELY DISASSEMBLED GRUNDFOS X 7 Dismantling Procedures CR CRI CRN 10 15e20 When Should A Part Be Replaced Part Motor Stool Suction Discharge Chamber Chambers Neck Ring Bearing ring Impellers Shaft Sleeve Stack Compression Spring Spacers amp Clamp Lock Nut Lock Washers O rings Shaft Seal Bushing in Disk Plate 79a Position s 2 4a 4
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