Grundfos CR Betriebsanleitung

CR, CRI, CRN

Double shaft seal (tandem)

Service instructions

GRUNDFOS INSTRUCTIONS

English (GB)

English (GB) Service instructions

Original service instructions.

CONTENTS

Page

1. Symbols used in this document

2. General information

Position numbers of parts (digits) refer to drawings and parts

lists; position numbers of tools (letters) refer to section 5. Service

tools.

Electrical parts must only be serviced by Grundfos or an

authorised service workshop.

Before dismantling

• Close the isolating valves, if fitted, and make sure that they

cannot be accidentally opened.

• Before starting work on the product, let the product and

pumped liquid cool off.

Before assembly

• Clean and check all parts.

• Replace defective parts with new parts.

• Order the necessary service kits.

• Always replace gaskets and O-rings.

During assembly

• Tighten screws and nuts according to section 3. Torques.

• Lubricate rings and screws according to section 4. Lubricants.

After assembly

If analog or digital inputs, the relay output or the CIM module has

been removed from the pump, you must check the

communication with external units after service.

1. Symbols used in this document 2

2. General information 2

3. Torques 3

4. Lubricants 3

5. Service tools 4

6. CR, CRI, CRN 1, 3, 5 5

6.1 Dismantling 5

6.2 Assembly 5

7. CR, CRI, CRN 10, 15, 20 6

7.1 Dismantling 6

7.2 Assembly 6

8. CR, CRI, CRN 32, 45, 64, 90 7

8.1 Dismantling 7

8.2 Assembly 7

9. CR, CRN 120, 150 8

9.1 Dismantling 8

9.2 Assembly 8

10. Exploded views 10

Warning

Prior to service work, read these service

instructions carefully. Installation and service

work must comply with local regulations and

accepted codes of good practice.

Observe the safety instructions in the installation

and operating instructions for the product.

Warning

If these safety instructions are not observed,

it may result in personal injury.

Warning

If these instructions are not observed, it may lead

to electric shock with consequent risk of serious

personal injury or death.

Caution

If these safety instructions are not observed,

it may result in malfunction or damage to the

equipment.

Note

Notes or instructions that make the job easier

and ensure safe operation.

Warning

Use personal protective equipment if there is a

risk of getting into contact with the pumped

liquid.

Observe local regulations.

Warning

Switch off the power supply and make sure that it

cannot be accidentally switched on.

Check that other pumps or sources do not force

flow through the pump even if the pump is

stopped. This will cause the motor to act like a

generator, resulting in voltage on the pump.

English (GB)

3. Torques 4. Lubricants

Pos. Description Pump Dimensions Torque

9Coupling

screws

CR, CRI, CRN

1, 3, 5, 10, 15,

M6 13

M8 31

M10 62

CR, CRN 32,

45, 64, 90 -85

CR, CRN 120,

150

M10 85

M16 100

Coupling

guard

screws

CR, CRN 32,

45, 64, 90,

120, 150

-6

18, 18a,

18b

Air vent

screws

CR, CRI, CRN

1, 3, 5, 10, 15,

20, 32, 45, 64,

90, 120, 150

-35

23, 23a,

23b, 23c Drain plugs - 35

28 Motor stool

screws

CR, CRI, CRN

1, 3, 5 M10 23

CR, CRI, CRN

1, 3, 5, 10, 15,

M6 10

M8 12

3/8" UNC 23

M12 40

1/2" UNC 40

M16 80

CR, CRN 32,

45, 64, 90,

120, 150

-62

36 Pump head

nuts

CR 1, 3, 5 - 40

CRI 1, 3, 5 - 50

CRN 1, 3, 5 - 60

CR, CRI 10,

15, 20 -80

CRN 10, 15,

20 - 100

CR, CRN 32,

45, 64, 90 - 100

CR, CRN 120,

150 - 120

CR, CRN 120,

150 (55-75

kW)

-80

58a,

58b, 58c

Seal carrier

screws

CR, CRN 32,

45, 64, 90,

120, 150

-62

105,

105b Shaft seal

CR, CRI, CRN

1, 3, 5, 10, 15,

-35

113 Shaft seal

screws

CR, CRI, CRN

1, 3, 5, 10, 15,

-2,5

CR, CRN 32,

45, 64, 90,

120, 150

-6

Pos. Designation Product No.

THREAD-EZE 00SV999728

58a, 58d, 58c

37a, 37b, 37c Rocol Sapphire Aqua-Sil 00RM2924

51 Soapy Water -

105, 105b

109a, 109b Rocol Sapphire Aqua-Sil 00RM2924

110, 110b

English (GB)

5. Service tools

ABC

DEF

GH I

JKL

MNO

Pos. Designation For

pos. CR, CRI,

CRN Tool

size Product

ATee

screwdriver 113

1, 3, 5, 10,

15, 20 2.5 -

120, 150 3 SV0153

BSlot

screwdriver 7a 1, 3, 5, 10,

15, 20 1.4 -

CRing/open-

end spanner

18,

18a

23a,

23b

1, 3, 5, 10,

15, 20, 32,

45, 64, 90,

120, 150

24 SV0122

1, 3, 5, 10,

15, 20

SV0083

SV0055

SV0054

32, 45, 64,

90, 120, 150 8SV0273

1, 3, 5 19 SV0054

10, 15, 20,

32, 45, 64,

90, 120, 150

24 SV0122

DRubber

hammer SV0349

E Punch 105b 32, 45, 64,

90 SV0015

F Hexagon key

1, 3, 5, 10,

15, 20

SV0196

SV0032

32, 45, 64,

90 8 SV0032

120, 150 8

SV0032

SV0033

113

1, 3, 5, 10,

15, 20 2.5 SV0277

32, 45, 64,

90, 120, 150 3-

28 32, 45, 64,

90, 120, 150 8 SV0032

58a 32, 45, 64,

90, 120, 150 8 SV0032

GTorque

screwdriver

113,

1, 3, 5, 10,

15, 20, 32,

45, 64, 90,

120, 150

1-6

SV0435

SV0438

H Hexagon bit

1, 3, 5, 10,

15, 20

SV0010

32, 45, 64,

90 8 SV0010

120, 150 8

10 SV0010

113

1, 3, 5, 10,

15, 20 2.5 SV0012

120, 150 3 -

28 32, 45, 64,

90, 120, 150 8 SV0010

ITorque

wrench

28 1, 3, 5, 10,

15, 20

4-20

Nm SV0092

9, 18,

23,28,

36, 58

1, 3, 5, 10,

15, 20, 32,

45, 64, 90,

120, 150

20-100

Nm SV0269

36 120, 150 40-200

Nm SV0400

JRing insert

tool

18,

18a

23a,

23b

1, 3, 5, 10,

15, 20, 32,

45, 64, 90,

120, 150

24 SV0524

1, 3, 5, 10,

15, 20

SV0310

SV0513

SV0519

32, 45, 64,

90, 120, 150 8SV0411

1, 3, 5 19 SV0519

10, 15, 20,

32, 45, 64,

90, 120, 150

24 SV0524

K Sliding guide 8 120, 150 -

LAdjusting

fork 105

10, 15, 20 96483950

32, 45, 64

90, 120, 150 22 985924

120, 150 32 96731316

M Lifting tool 51 120, 150 97536386

N Eye bolt 28b 32, 45, 64

90, 120, 150 ID2779

OTabular box

spanner

105,

105b

1, 3, 5, 10,

15, 20 36 SV2007

Pos. Designation For

pos. CR, CRI,

CRN Tool

size Product

English (GB)

6. CR, CRI, CRN 1, 3, 5

6.1 Dismantling

1. Remove screws (pos. 7a) and coupling guards (pos. 7).

2. Remove screws (pos. 9), coupling (pos. 8) and shaft pin

(pos. 10a).

3. Remove screws (pos. 28) and the motor.

4. Slacken socket screws (pos. 113) and remove shaft seal

(pos. 105).

5. Remove nuts (pos. 36).

6. CR: Remove motor stool (pos. 2) and O-ring (pos. 37b).

CRI, CRN: Remove motor stool (pos. 2), pump head cover

(pos. 77) and O-ring (pos. 37b).

7. Slacken socket screws (pos. 113) and remove lower shaft seal

(pos. 105b).

8. Remove cover (pos. 77a).

9. Continue dismantling according to the instructions of the

standard CR pump.

6.2 Assembly

1. Fit O-ring (pos. 37a) and rubber springs (pos. 60) in cover

(pos. 77a).

2. Fit cover (pos. 77a) on the outer sleeve.

3. Lubricate shaft (pos. 51). Fit and tighten lower shaft seal (pos.

105b) in cover (77a).

4. Press the shaft home, and tighten the socket screws of lower

shaft seal (pos. 113), using the hole for air vent screw

(pos. 18a).

5. CR: Fit O-ring (pos. 37b) in motor stool (pos. 2) and fit the

stool on the cover.

CRI, CRN: Fit O-ring (pos. 37b) in pump head cover (pos. 77),

and fit the pump head cover and the motor stool on the cover.

6. Fit washer (pos. 66a) and cross-tighten nuts (pos. 36) on the

staybolts.

7. Lubricate shaft (pos. 51). Fit and tighten upper shaft seal

(pos. 105) in motor stool (pos. 2) or pump head cover

(pos. 77).

8. Lift the pump shaft to its highest position, then push it down to

half way of its lowest position, and tighten the socket screws

of the upper and lower shaft seals.

9. Lift the pump shaft, and fit the adjusting fork. See fig. 1.

Fig. 1 Fitting the adjusting fork

10. Fit the motor and tighten screws (pos. 28).

11. Fit shaft pin (pos. 10a) in the shaft, coupling (pos. 8) and

screws (pos. 9). See fig. 2.

Fig. 2 Fitting the coupling

12. Remove the adjusting fork, and place it on the inside of one of

the coupling guards (pos. 7).

13. Check that the pump shaft can rotate freely.

14. Fit coupling guards (pos. 7) and tighten screws (pos. 7a).

Note

Note that air vent screw (pos. 18a) in the cover is

above drain plug (pos. 25) in the bottom plate.

Note

Make sure that air vent screws (pos. 18 and 18a)

are not positioned on the same side of the pump.

TM02 7923 4403TM05 7451 1113

English (GB)

7. CR, CRI, CRN 10, 15, 20

7.1 Dismantling

1. Remove screws (pos. 7a) and coupling guards (pos. 7).

2. Remove screws (pos. 9) and the coupling.

3. Remove screws (pos. 28) and the motor.

4. Slacken socket screws (pos. 113), and remove shaft seal

(pos. 105).

5. Remove nuts (pos. 36).

6. CR: Remove motor stool (pos. 2) and O-ring (pos. 37b).

CRI, CRN: Remove motor stool (pos. 2), pump head cover

(pos. 77), and O-ring (pos. 37b).

7. Slacken socket screws (pos. 113) and remove lower shaft seal

(pos. 105b).

8. Remove cover (pos. 77).

9. Remove rubber springs (pos. 60) from underneath the cover.

10. Continue dismantling according to the instructions of the

standard CR pump.

7.2 Assembly

1. Lubricate O-ring (pos. 37a) and fit it into cover (pos. 77a).

2. Fit new rubber springs (pos. 60) underneath cover (pos. 77a)

and fit the cover on the outer sleeve.

3. Lubricate pump shaft (pos. 51). Fit and tighten lower shaft

seal (pos. 105b).

4. Press the shaft home and tighten socket screws (pos. 113) of

lower shaft seal (pos. 105b).

5. CR: Fit O-ring (pos. 37b) in motor stool (pos. 2) and fit the

stool on the cover.

CRI, CRN: Fit O-ring (pos. 37b) in pump head cover (pos. 2),

and fit the pump head cover and the motor stool on the cover.

6. Fit washers (pos. 66a) and cross-tighten nuts (36) on the

staybolts.

7. Lubricate pump shaft (pos. 51). Fit and tighten upper shaft

seal (pos. 105) in stool (pos. 2) or pump head cover (pos. 77).

8. Press the shaft home, and tighten socket screws (pos. 113) of

upper shaft seal (105).

9. Lift the pump shaft, and insert the adjusting fork under the

shaft seal driver. See fig. 3.

Fig. 3 Fitting the adjusting fork

10. Fit the motor and tighten screws (pos. 28).

11. Fit shaft pin (pos. 10a) in the shaft, coupling (pos. 8) and

screws (pos. 9). See fig. 4.

Fig. 4 Fitting the coupling

12. Remove the adjusting fork, and place it on the inside of one of

the coupling guards (pos. 7).

13. Check that the pump shaft can rotate freely.

14. Fit coupling guards (pos. 7) and screws (pos. 7a).

Note

Note that air vent screw (pos. 18a) in the cover is

above drain plug (pos. 25) in the bottom plate.

Note

Make sure that air vent screws (pos. 18 and 18a)

are not positioned on the same side of the pump.

TM02 7923 4403TM05 7451 1113

English (GB)

8. CR, CRI, CRN 32, 45, 64, 90

8.1 Dismantling

1. Remove screws (pos. 7a) and coupling guards (pos. 7).

2. Remove screws (pos. 9) and coupling (pos. 8).

3. Attach the lifting device to eyebolts (pos. 28b).

4. Remove screws (pos. 28). Lift and remove the motor and

motor stool (pos. 1a).

5. Remove the flushing pipes.

6. Slacken socket screws (pos. 113) of the upper shaft seal

(pos. 105), and remove seal driver (pos. 112a).

7. Remove screws (pos. 58a).

8. Remove flushing chamber (pos. 77a).

9. Remove O-ring (pos. 109a).

10. Press stationary shaft seal ring (pos. 103) out of flushing

chamber (pos. 77a), and remove O-ring (pos. 102).

11. Remove lower seal driver (pos. 112) with rotating shaft seal

ring (pos. 104), upper seal driver (pos. 111), O-ring (pos. 107),

spring retainer (pos. 106) and spring (pos. 108).

12. Remove O-ring (pos. 110b).

13. Slacken socket screws (pos. 113) and remove lower shaft seal

(pos. 105b).

14. Continue dismantling according to the instructions of the

standard CR pump.

8.2 Assembly

1. Lubricate the shaft and fit lower shaft seal (pos. 105b).

2. Press the shaft home and tighten sockets screws (pos. 113) of

the lower shaft seal.

3. Lubricate and fit O-ring (pos. 110b) underneath lower seal

driver (pos.112).

4. Fit spring (pos. 108) and spring retainer (pos. 108) on the

lower seal driver.

5. Lubricate and fit O-ring (pos. 107) underneath upper seal

driver (pos. 111).

6. Fit the upper seal driver on the spring retainer.

7. Fit rotating seal ring (pos. 104) on the upper seal driver.

8. Lubricate and fit O-ring (pos. 102) into the stationary seal ring.

9. Fit the stationary seal ring into flushing chamber (pos. 77a).

10. Fit the lower seal driver into flushing chamber (pos. 77a);

make sure that the lower seal driver emerges from the top of

the chamber and that the lower and upper seal drivers

engage.

11. Fit seal driver ring (pos. 112a) on top of the chamber and on

the lower seal driver. Position it so that socket screws

(pos. 113) are aligned with the holes of the lower seal driver.

12. Tighten the socket screws slightly so that they fit into the

holes of the lower seal driver, but still leave room for the shaft

to slide.

Fig. 5 Fitting the upper shaft seal and flushing chamber

13. Fit the adjusting fork between the top of the flushing chamber

and the seal driver ring.

14. Lubricate and fit O-ring (pos. 109a) underneath flushing

chamber (pos. 77a).

15. Fit the flushing chamber on the shaft and press it home on the

pump head.

16. Fit and cross-tighten screws (pos. 58a).

17. Press the pump shaft home and tighten the socket screws

(pos. 113) of the upper shaft seal.

18. Attach the lifting device to the eyebolts. Carefully lift the motor

with the motor stool and fit it on upper pump head (pos. 2a).

Cross-tighten screws (pos. 28).

19. Fit coupling (pos. 8) and tighten screws (pos. 9). See fig. 6.

Fig. 6 Adjusting the coupling

20. Remove the adjusting fork and check that the pump can rotate

freely.

21. Fit coupling guards (pos. 7) and tighten screws (pos. 7a).

Caution

To prevent the motor from tipping over, hold it

straight when using a lifting device.

Note

Note that the shaft seal is spring-loaded.

Note

The extruded part of the spring retainer goes

against the spring.

Caution

Do not touch the seal faces with the fingers or

any greasy tool.

Make sure that the polished face of the rotating

seal ring faces upwards.

TM058746_2613

Caution

To prevent the motor from tipping over, hold it

straight when using a lifting device.

Note

Leave a gap of 2 mm between the bottom of the

coupling and the top of the flushing chamber.

TM03 9607 4207

English (GB)

9. CR, CRN 120, 150

9.1 Dismantling

1. Remove screws (pos. 7a) and coupling guards (pos. 7).

2. Remove screws (pos. 9) and coupling (pos. 8).

3. Attach the lifting device to eyebolt (pos. 28b).

4. Remove hexagon socket screws (pos. 28).

5. 55-75 kW: Remove washers (pos. 66a) and nuts (pos. 36)

from the motor stool.

6. Lift and remove motor and motor stool (pos. 1a).

7. Remove screws (pos. 58a).

8. 11-45 kW: Remove seal carrier (pos. 58).

9. Clean shaft (pos. 51) and slacken socket screws (pos. 113) of

upper shaft seal (pos. 105a).

10. Pull shaft seal (pos. 105a) off pump head (pos. 2) and free of

shaft (pos. 51) using two screwdrivers. See fig. 7.

Fig. 7 Removing the upper shaft seal

11. Remove nuts (pos. 36) and washer (pos. 66a) from upper

pump head (pos. 2).

12. Remove upper pump head (pos. 2), it may be necessary to

loosen it with a rubber mallet.

13. Clean the shaft above lower shaft seal (pos. 105b).

14. Loosen socket screw (pos. 113) of lower shaft seal

(pos. 105b).

15. 11-45 kW: Remove screws (pos. 58c)

16. Remove seal carrier (pos. 58b).

17. Pull shaft seal (pos. 105b) off lower pump head (pos. 2b) and

free of shaft (pos. 51) using two screwdrivers.

18. Continue the dismantling according to the instructions for

dismantling of the standard pump.

9.2 Assembly

1. Clean and smooth shaft (pos. 51) using the holder with emery

cloth supplied with the shaft seal kit.

2. Fit lower pump head (pos. 2b) on shaft (pos. 51) and carefully

press it down on the shaft. When it reaches the outer sleeve

press it with even force on the sleeve.

3. Press lower shaft seal (pos. 105b) down into position in lower

pump head (pos. 2b).

4. 11-45 kW: Fit seal carrier (pos. 58b).

5. Cross-tighten screws (pos. 58c).

6. Fit O-ring (pos. 37b) in lower pump head (pos. 2b).

7. Fit O-ring (pos. 37b) in upper pump head (pos. 2).

8. Fit the upper pump head.

9. Fit washers (pos. 66a) and cross-tighten nuts (pos. 36).

10. Fit upper shaft seal (pos. 105).

11. Remove excess grease from shaft end (pos. 51) using a cloth.

12. 11-45 kW: Fit seal carrier (pos. 58).

13. Cross-tighten screws (pos. 58a).

14. Press the shaft home and tighten socket screws (pos. 113) of

each shaft seals (pos. 105a and 105b). See fig. 8.

Fig. 8 Tightening the lower shaft seal

15. Attach the lifting device to eyebolt (pos. 28b).Carefully lift the

motor with the stool and fit it on upper pump head (pos 2b).

Cross-tighten screws (pos. 28).

Caution

To prevent the motor from tipping over, hold it

straight when using a lifting device.

Note

Slacken the screws only so much that the shaft

seal can be removed from the shaft.

TM03 9608 4207

Note

Make sure that air vent screws (pos. 18and 18b)

are positioned on the same side of the pump.

TM04 5054 2713

Caution

To prevent the motor from tipping over, hold it

straight when using a lifting device.

58a

113

109

110

18b

23a

18b

58c 113

37a

58b

37b

Press the pump shaft home

English (GB)

16. Turn the motor and motor stool (pos. 1a) to the required

terminal box position, according to the installation

instructions.

17. Cross-tighten screws (pos. 28).

18. 55-75 kW: Fit washers (pos. 66a) and cross-tighten nuts

(pos. 36) on the stool.

19. Lift the pump shaft with the lifting tool. See fig. 9.

Fig. 9 Lifting the pump shaft

20. Insert the adjusting fork between the shaft seal driver and

carrier. See fig. 10.

Fig. 10 Inserting the adjusting forks

21. Fit coupling (pos. 8) on the shaft using the sliding guide or

with your hand, depending on the pump size. The top of the

pump shaft must be flush with the bottom om the clearance

chamber in the coupling. See fig. 11.

Fig. 11 Fitting the coupling

22. Lubricate and tighten screws (pos. 9), but leave loose.

23. Check that the gaps either side of the coupling halves are

equal.

24. Tighten screws (pos. 9) two and two (one side at a time).

25. Remove the adjusting fork, and place it under one of the

screws (pos. 58). See fig. 12.

Fig. 12 Removing the adjusting fork and placing it under one

of the other screws

26. Check that the pump shaft can rotate freely.

27. Fit coupling guards (pos. 7) and screws (pos. 7a).

TM03 9609 4207TM03 9606 4207TM03 9607 4207

TM03 9614 4207

English (GB)

10. Exploded views

Fig. 13 CR, CRI, CRN 1, 3, 5

TM02 1517 1107

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