Grundfos CR 95 Service Instructions Manual
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Grundfos CR 95 Service Instructions Manual

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GRUNDFOS INSTRUCTIONS
CR, CRN 95 to 255
50/60 Hz
Service instructions

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Summary of Contents for Grundfos CR 95

  • Page 1 GRUNDFOS INSTRUCTIONS CR, CRN 95 to 255 50/60 Hz Service instructions...
  • Page 3 CR, CRN 95 to 255 English (GB) Service instructions ............... . 4...

  • Page 4: Table Of Contents

    Contaminated products ..... . . 5 The symbols and hazard statements below may appear in Grundfos installation and operating instructions, safety instructions and Servicing the motor .

  • Page 5: Safety

    Grundfos to service the product, contact Grundfos with details WARNING about the pumped liquid before returning the product for service. Falling objects Otherwise, Grundfos can refuse to accept the product for service. Death or serious personal injury Any application for service must include details about the pumped ‐...

  • Page 6: Dismantling And Assembling The Product

    3. Dismantling and assembling the product 3.2 Shaft seal, motor stool, pump head cover, sleeve and chamber stack Parts are indicated by numbers and refer to the drawings in the section on drawings. 3.2.1 Preparations Tools are indicated by letters and refer to the section on special 1.
  • Page 7 15. Fit service tool B in the top of the pump shaft. When handling the chamber stack, it is important to pay close attention in order not to damage the thrust- handling device (120), if fitted. 16. Attach approved lifting equipment to service tool B and lift up the chamber stack.
  • Page 8 8. Install the pump head cover (2) on the sleeve (55). Use service 15. Install the shaft seal (105) on the shaft (51) and press it home tool J to centre the chamber stack in the pump head cover (2). against the pump head cover (2).
  • Page 9 17. Check that the height X is maximum 71 mm. See the figure • If rotating freely with very little friction, try rotating CCW and below. CW until the shaft binds and you feel the metallic contact between the chambers and impellers. If the measured height is not within the specifications, the pump has not been assembled correctly, and the pump must be •...

  • Page 10: Thrust-Handling Device

    25. Pull the adjusting fork F free of the shaft (51) and place it on the backside of one of the coupling guards (7). See the figure below. Fitting adjusting fork Fon the backside of coupling guard (7) 26. Install the coupling guards (7) and tighten the screws (7a). See the section on torques.
  • Page 11 7. To renew the thrust-handling-device wear parts, see the section on renewing thrust-handling-device wear parts. Related information 3.1.1 Removal 3.2.2 Dismantling 4. Renewing thrust-handling-device wear parts 3.3.2 Assembly 1. Install the flange (120k) in the pump base (6). 2. Fit and tighten the four screws (26b). 3.

  • Page 12: Renewing Thrust-Handling-Device Wear Parts

    4. Renewing thrust-handling-device wear parts Procedure 1. Place service tool H1 securely in a vice. See the figure below for Preparations correct positioning. Renewing the thrust-handling-device wear parts requires that the thrust-handling device (120) has been removed as described in the 2.
  • Page 13 Related information 3.1.1 Removal 3.3 Thrust-handling device 4.1.3 Dismantling the chamber stack 7.3.1 Special tools 4.1.2 Servicing the chamber stack in service tool for pump base mounting Preparations Removing the chamber stack requires that the pump has been dismantled as described in the section on removal of the motor and coupling, the section on shaft seal, motor stool, pump head cover, sleeve and chamber stack and the section on thrust-handling device.
  • Page 14 7. Fit service tool D in the hole marked "Dismantling". See the figure below. Loosening the impeller (49 or 49a) with service tool C 6. For pumps with ∅28 or ∅36 pump shaft: Insert service tool M on top of the split-cone nut (48) and use a hammer to knock service tool Q against the split-cone nut (48) to loosen the impeller (49 or 49a) from the split cone (49b).
  • Page 15 8. Continue removing the remaining chambers (4 or 4a), split-cone 4.1.4 Assembling the chamber stack nuts (48), split cones (49b), impellers (49 or 49a) and bearings For chamber types, see the section on order of assembly for (47a). chambers and impellers. For pumps with ∅28 or ∅36 pump shaft: 1.

  • Page 16: Renewing Chamber Wear Parts

    9. Fit the bottom chamber with bearing (4a), and press it home on 5. Renewing chamber wear parts the inlet part (44). 5.1 Neck ring (45) 10. Continue installing the remaining chambers (4), split-cone nuts (48), split cones (49b), impellers (49 or 49a) and bearings (47a). Neck rings (45) and neck-ring retainers (65) are installed in chambers (4 or 4a) and in the inlet part (44).
  • Page 17 3. Place the neck-ring retainer (65) on top of the disc with the driving dogs upwards. See the figure below. Neck-ring retainer (65) placed in service tool with the driving dogs pointing upwards 4. Place the neck ring (45) on top of the neck-ring retainer (65). Note that the text "UP"...

  • Page 18: Bush (47C) And Retaining Ring (47D)

    5.2 Bush (47c) and retaining ring (47d) 6. Renewing shaft seal wear parts This section applies only to shaft seals with an inner diameter of 5.2.1 Dismantling ∅28 or ∅36. 1. Place the chamber on a flat surface. Shaft seals with an inner diameter of ∅22 cannot be serviced but 2.

  • Page 19: Assembly

    6.2 Assembly Do not touch the seal faces of the stationary seal ring (103) or rotating seal ring (104). Only hold these parts on their sides. Do not apply any kind of grease or lubricant on the stationary seal ring (103) or rotating seal ring (104) since this can result in malfunction of the shaft seal.

  • Page 20: Additional Information

    7. Additional information 7.1 Torques Pos. Description Dimensions Torque [Nm] Screws for bracket Coupling-guard screws Coupling screws Vent screw 1/2" Plug 1/2" Plug 1/2" Hexagon-socket head-cap screw M16 (CR, CRN 95, PN 16/25/30) M20 (CR, CRN 95, PN 25) M20 (CR, CRN 95, PN 30/40) M20 (CR, CRN 95/125/155, PN 16) M20 (CR, CRN 125/155, PN 25/30) Staybolt nuts...

  • Page 21: Special Service Tools

    7.3 Special service tools...
  • Page 22 7.3.1 Special tools Pos. Description For pos. Further information Part number For ∅22 pump shafts 99072586 Service tool for loosening and tightening shaft seal For ∅28 and ∅36 pump shafts 99072587 Eyebolt with swivel function M10 × 1.5 For ∅22 pump shafts SV0004 For ∅28 pump shafts Key for split-cone nut...

  • Page 23: Order Of Assembly For Chambers And Impellers

    7.4 Order of assembly for chambers and impellers The assembly of the pump is illustrated in the following drawings. Each symbol corresponds to a different chamber. 7.4.1 Standard impellers Pos. 49 is the standard size impeller. 7.4.2 Impellers with reduced diameter Pos.

  • Page 24: Drawings

    7.5 Drawings 7.5.1 Overview of drawings Pumps without thrust-handling device Drawing type Pump Pumps with ∅22 shaft Exploded drawing Pumps with ∅28 and ∅36 shaft Pumps with ∅22 shaft Sectional drawing Pumps with ∅28 and ∅36 shaft Pumps with thrust-handling device Drawing type Pump Exploded drawing...
  • Page 25 7.5.2 Exploded views Pumps with ∅22 shaft and without thrust-handling device 440a 440b ∅ 22 shaft and without thrust-handling device Exploded view of a CR, CRN pump with...
  • Page 26 Pumps with ∅28 or ∅36 shaft and without thrust-handling device 112a 440a 440a 440b 440b 120j 120j 120k ∅ 28 or ∅ 36 shaft and without thrust-handling device Exploded view of a CR, CRN pump with...
  • Page 27 Pumps with ∅28 or ∅36 shaft and with thrust-handling device 112a 120a 120b 120c 120d 120e 120f 120g 120h 440a 120i 120j 120j 440b 120j 120k ∅ 28 or ∅ 36 shaft and with thrust-handling device Exploded view of a CR, CRN pump with...
  • Page 28 7.5.3 Sectional views Pumps with ∅22 shaft and without thrust-handling device 440b 440a ∅ 22 shaft and without thrust-handling device Sectional view of a CR, CRN pump with...
  • Page 29 Pumps with ∅28 or ∅36 shaft and without thrust-handling device 120j 120k 440b 440a ∅ 28 or ∅ 36 shaft and without thrust-handling device Sectional view of a CR, CRN pump with...

  • Page 30: Document Quality Feedback

    Pumps with ∅28 or ∅36 shaft and with thrust-handling device 120e 120a 120c 120b 120d 120f 120g 120i 120j 440b 120h 440a 120j 120j 120k 120a 120b 120c 120d 120e 120f 120g 120h 26b 26c 120j 120k 120j 120i120j ∅ 28 or ∅ 36 shaft and with thrust-handling device Sectional view of a CR, CRN pump with 8.
  • Page 31 Tel.: +387 33 592 480 Centre Turkey Fax: +387 33 590 465 29-33 Wing Hong Street & 68 King Lam GRUNDFOS Pumper A/S GRUNDFOS POMPA San. ve Tic. Ltd. Sti. www.ba.grundfos.com Street, Cheung Sha Wan Strømsveien 344 Gebze Organize Sanayi Bölgesi E-mail: grundfos@bih.net.ba...
  • Page 32 99233360 12.2022 ECM: 1355188 www.grundfos.com...

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