Grundfos CR Series Service Instructions Manual
  1. Manuals
  2. Brands
  3. Grundfos Manuals
  4. Water Pump
  5. CR Series
  6. Service instructions manual

Grundfos CR Series Service Instructions Manual

95 to 255, 50/60 hz
Hide thumbs Also See for CR Series:
Table of Contents

Advertisement

Quick Links

See also: Operation & Installation Manual
GRUNDFOS INSTRUCTIONS
CR, CRN 95 to 255
50/60 Hz
Service instructions

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the CR Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Grundfos CR Series

Summary of Contents for Grundfos CR Series

  • Page 1 GRUNDFOS INSTRUCTIONS CR, CRN 95 to 255 50/60 Hz Service instructions...

  • Page 3: Table Of Contents

    - Action to avoid the hazard. 6.2 Assembly Additional information 1.2 Notes 7.1 Torques The symbols and notes below may appear in Grundfos 7.2 Lubricants installation and operating instructions, safety instructions and 7.3 Special service tools service instructions. 7.4 Order of assembly for chambers and impellers 7.5 Drawings...

  • Page 4: Safety Details To Be Aware Of When Working On The Product

    The product will be classified as contaminated if it has been used and that it cannot be accidentally switched on. for a liquid which is injurious to health or toxic. If you request Grundfos to service the product, contact Grundfos WARNING with details about the liquid before returning the product for Falling objects service.

  • Page 5: Shaft Seal, Motor Stool, Pump Head Cover, Sleeve And Chamber Stack

    3.1.2 Installation 1. Carefully lift the motor onto the motor stool (1a) using approved lifting equipment. 2. Install the screws (28a), washers (32a) and nuts (36a). 3. Lubricate and tighten the nuts (36a) to the specified torque. See section 7.1 Torques. 4.
  • Page 6 6. CR pumps only: Install the four screws (60) and the brackets 3.2.3 Assembly (2c) in the pump head cover (2). See section 7.1 Torques. 1. Lubricate and install a new o-ring (37) in the pump base (6). 7. Install the outlet part (3b) in the pump head cover (2). See section 7.2 Lubricants.
  • Page 7 11. Lubricate the threads of the staybolts (26) and cross-tighten 22. Tighten the three set screws (113) to the specified torque. See the nuts (36) to the specified torque. See sections 7.1 Torques section 7.1 Torques. and 7.2 Lubricants. 23. Lift the pump shaft with a crowbar and insert the adjusting fork 12.

  • Page 8: Thrust-Handling Device

    3.3 Thrust-handling device This section applies only for pumps fitted with a thrust-handling device (120). All parts for the thrust-handling device must be handled very carefully in order to avoid damaging them. There are two ways to service the thrust-handling device: •...

  • Page 9: Renewing Thrust-Handling Device Wear Parts

    3.3.3 Servicing the thrust-handling device from the pump 3.3.4 Assembly base 1. Fit thrust-handling device parts (120a, 120b, 120c, 120d). 2. Fit the washer (120e) and nut (120f). Preparations 1. Disconnect the power supply and remove the power cable. 3. Tighten the nut (120f). Use service tool D to hold the pump shaft (51) when tightening.
  • Page 10 4.1.1 Servicing the chamber stack in service tool for vice mounting Preparations Removing the chamber stack requires that the pump has been dismantled as described in the following sections: • 3.1.1 Removal. • 3.2 Shaft seal, motor stool, pump head cover, sleeve and chamber stack.
  • Page 11 Procedure 1. Fit service tool B in the end of the pump shaft (51). 2. Attach approved lifting equipment to service tool B and lift the chamber stack out of the pump base (6). 3. Lay down the chamber stack on a solid working surface and take the necessary precautions to prevent the chamber stack from moving around.
  • Page 12 Procedure 1. Loosen the screws (26 b) and remove the straps (26a). 2. Remove the top chamber (3 or 3a). 3. Loosen the split-cone nut (48) using service tool C, but leave it so that it is still engaged with a few turns of thread on the impeller (49 or 49a).
  • Page 13 4.1.4 Assembling the chamber stack For chamber types, see section 7.4 Order of assembly for chambers and impellers. 1. Install the inlet part (44) over the pump shaft (51) which is placed in service tool H1 or H2. 2. Fit the impeller (49 or 49a) which was removed as the last one during dismantling.

  • Page 14: Renewing Chamber Wear Parts

    3. Place the neck-ring retainer (65) on top of the disc with the chamber wear parts Renewing driving dogs upwards. See fig. 31. 5.1 Neck ring (45) Neck rings (45) and neck-ring retainers (65) are installed in chambers (4 or 4a) and in the inlet part (44). Below procedure covers the renewal of neck rings in chambers as well as in inlet part.

  • Page 15: Bush (47C) And Retaining Ring (47D)

    8. Tighten the screw to 15 Nm. 5.2 Bush (47c) and retaining ring (47d) 5.2.1 Dismantling 1. Place the chamber on a flat surface. 2. Press the bush (47c) and retaining ring (47d) out of the chamber using service tool K. Fig.

  • Page 16: Renewing Shaft-Seal Wear Parts

    6. Renewing shaft-seal wear parts 6.2 Assembly This section applies only for shaft seals with an inner diameter of Do not touch the seal faces of the stationary seal ring ∅28 or ∅36. (103) or rotating seal ring (104). Only hold these Shaft seals with an inner diameter of ∅22 cannot be serviced but parts on their sides.

  • Page 17: Torques

    7. Additional information 7.1 Torques Pos. Description Dimensions Torque [Nm] Coupling-guard screws Coupling screws Vent screw 1/2" Plug 1/2" Plug 1/2" Screws for straps M16 (CR, CRN 95, PN 16) M20 (CR, CRN 95, PN 40) M20 (CR, CRN 125/155, PN 16) M20 (CR, CRN 125/155, PN 25/30) Staybolt nuts M24 (CR, CRN 125/155, PN 25/30/40)

  • Page 18: Special Service Tools

    7.3 Special service tools...
  • Page 19 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 99072587 shafts Eyebolt with swivel function M10 x 1.5 For ∅22 pump shafts SV0004 For ∅28 pump shafts Key for split-cone nut...

  • Page 20: 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. Note: Pos. 49 is the standard size impeller. Pos. 49a is an impeller with reduced diameter, 2/3 of standard size. CR95 50 Hz 60 Hz...

  • Page 21: Drawings

    7.5 Drawings 7.5.1 Overview of drawings Pumps without thrust-handling device Drawing type Pump Page number 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 Page number...
  • Page 22 7.5.2 Exploded views Pumps with ∅22 shaft and without thrust-handling device 440a 440b Fig. 38 Exploded view of CR, CRN pump with ∅22 shaft and without thrust-handling device...
  • Page 23 Pumps with ∅28 or ∅36 shaft and without thrust-handling device 112a 440a 440a 440b 440b 120j 120j 120k 120l Fig. 39 Exploded view of CR, CRN pump with ∅28 or ∅36 shaft and without thrust-handling device...
  • Page 24 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 120l Fig. 40 Exploded view of CR, CRN pump with ∅28 or ∅36 shaft and with thrust-handling device...
  • Page 25 7.5.3 Sectional views Pumps with ∅22 shaft and without thrust-handling device 440b 440a Fig. 41 Sectional view of CR, CRN pump with ∅22 shaft and without thrust-handling device...
  • Page 26 Pumps with ∅28 or ∅36 shaft and without thrust-handling device 120j 120k 120l 440b 440a Fig. 42 Sectional view of CR, CRN pump with ∅28 or ∅36 shaft and without thrust-handling device...
  • Page 27 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 120l 120j 120k 120j 120i120j 120l Fig. 43 Sectional view of CR, CRN pump with ∅28 or ∅36 shaft and with thrust-handling device...
  • Page 31 BOMBAS GRUNDFOS DO BRASIL Turkey Siu Wai Industrial Centre GRUNDFOS Pumper A/S Av. Humberto de Alencar Castelo Branco, GRUNDFOS POMPA San. ve Tic. Ltd. Sti. 29-33 Wing Hong Street & Strømsveien 344 Gebze Organize Sanayi Bölgesi CEP 09850 - 300...
  • Page 32 99233360 0718 ECM: 1238281 www.grundfos.com...

This manual is also suitable for:

Crn series

Table of Contents