Grundfos CR SF 32 Operating instructions

CRN SF 32, 45, 64 and 90
Model B
Service instructions
GRUNDFOS INSTRUCTIONS

2

English (GB)
3
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 in section
8. Exploded views; 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.
• Note the centre of gravity of the pump to prevent it from
overturning. This is especially important in the case of long
pumps.
• Disconnect the electricity supply to the motor.
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
• Lubricate and tighten screws and nuts according to section
4. Torques and 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.
Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
– Use the public or private waste collection service.
– If this is not possible, contact the nearest Grundfos company
or service workshop.
1. Symbols used in this document 3
2. General information 3
3. Identification 4
3.1 Nameplate 4
3.2 Type key 5
3.3 Code for shaft seal 6
4. Torques and lubricants 7
5. Service tools 8
5.1 Special tools 8
5.2 Standard tools 9
5.3 Torque tools 9
6. Dismantling and assembly 10
6.1 General information 10
6.2 Replacement of motor 10
6.3 Replacement of motor stool 11
6.4 Replacement of coupling 11
6.5 Replacement of shaft seal 11
6.6 Replacement of pump head 12
6.7 Replacement of chamber stack 13
6.8 Chamber stack 13
6.9 Pump head and shaft seal 14
6.10 CRN 32 SF order of assembly 15
6.11 CRN 45 SF order of assembly 16
6.12 CRN 64 SF order of assembly 17
6.13 CRN 90 SF order of assembly 18
7. Positions 19
8. Exploded views 20
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.
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)
4
3. Identification
This section shows the type key, the nameplate and the codes
that can appear in the variant code.
3.1 Nameplate
Fig. 1 Nameplate
Note
As codes can be combined, a code position may
contain more than one code (letter).
TM05 6093 4512
Pos. Description
1 Type designation
2 Model
3 Frequency
4Shaftpower
5 Speed
6 Head against closed valve
7 Rated flow rate
8 Head at rated flow rate
9 Maximum pressure and temperature
10
Direction of rotation
CCW:Counterclockwise
CW:Clockwise
11 Not in use
12 The serial number of the pump
13 Country of production
14 Not in use
15 Not in use
16 Minimum Efficiency Index
17 Pump efficiency
3
96547135
5
7
9
11
12
15
14 16 17
1
2
4
6
8
10
13
Type
ڦS(%)
Pmax/tmax bar/°C
6HULDO12
Hmax m
Model
fHzP2kW
Hm
n min-1
Q3 PK
DK-8850 Bjerringbro, Denmark
0(,>

English (GB)
5
3.2 Type key
Example CRN 10- 21 SF- P- GI- E- HQQE
Type range
Rated flow rate, m3/h
Number of stages
Code for pump version
A = Basic version
B = Oversize motor
E = Certificate/approval
F = Pump for high temperatures (air-cooled top)
H = Horizontal version
HS = High-pressure pump with over-synchronous speed and reversed chamber stack
and direction of rotation
I = Differential pressure rating
K = Pump with low NPSH
M = Magnetic drive
P = Undersize motor
R = Horizontal version with bearing bracket
SF = High-pressure pump with reversed chamber stack and direction of rotation
T = Oversize motor (two flange sizes bigger)
X = Special version, or the pump consists of more than two versions
Code for pipe connections
A = Oval flange
B = NPT thread
CA = FlexiClamp (CRI, CRN)
CX = TriClamp (CRI, CRN)
F = DIN flange
FGJ = DIN, ANSI and JIS flange
GJ = ANSI and JIS flange
G = ANSI flange
J = JIS flange----
N = Different connection diameter
O = Externally threaded, union
P = PJE coupling
W = Internally threaded
X = Special version
Code for materials
A = Pump head: cast iron
Other parts in contact with the pumped liquid: stainless steel DIN W.-Nr. 1.4301
D = Carbon graphite-filled PTFE (bearings)
G = Stainless steel parts of DIN W.-Nr. 1.4401/AISI 316 or better class
I = Base plate and flanges of DIN W.-Nr. 1.4408/AISI 316LN or better class
I = Stainless steel parts of DIN W.-Nr. 1.4301/AISI 304 or similar class
II = All parts of stainless steel; parts in contact with the pumped liquid of DIN W.-Nr. 1.4301/AISI 304
K = Bronze (bearings)
S = Silicon carbide bearings and PTFE neck rings (standard in CR)
T = Titanium
X = Special version
Code for rubber parts
E = EPDM (ethylene propylene)
F = FXM (polytetrafluoroethylene and propylene)
K = FFKM (perfluoroelastomer)
P = NBR (nitrile)
T = PTFE (polytetrafluoroethylene)
V = FKM (fluorocarbon)
Code for shaft seal. See section 3.3 Code for shaft seal.

English (GB)
6
3.3 Code for shaft seal
The code for shaft seal always consists of four letters.
The following codes are used:
Example H Q Q E
Principal Grundfos type
designation for shaft seal 1
Material, rotating seal face 2
Material, stationary seat 3
Material, secondary seal 4
Position Code Description
1
A O-ring seal with fixed driver
B Rubber bellows seal
C O-ring seal with spring as seal driver
D O-ring seal, balanced
E Cartridge seal with O-ring
F Cartridge seal with rubber bellows
H Balanced cartridge seal with O-ring
K Type M as cartridge seal
M Shaft seal with metal bellows
O Double seal, back-to-back
P Double seal, tandem
RO-ring seal, type A, with reduced sliding
surfaces
X Special version
2 and 3
B Carbon, synthetic resin-impregnated
C Other types of carbon
S Chromium steel
HCemented tungsten carbide, embedded
(hybrid)
U Cemented tungsten carbide
Q Silicon carbide
V Aluminium oxide
X Other ceramics
4
EEPDM
FFXM
P NBR (nitrile rubber)
T PFTE
VFKM
K FFKM

English (GB)
7
4. Torques and lubricants
Pos. Designation Dimensions Torque [Nm] Lubricant
2d Hexagon socket head cap screw M10 x 50 65 Thread-Eze
9 Hexagon socket head cap screw M10 x 25 85 Thread-Eze
18 Air vent screw 5/20
23 Plug 1/2" 35 Thread-Eze
25
26d Nut M16 100 Thread-Eze
28 Hexagon head bolt M16 x 50 Thread-Eze
29 Nut M16 Thread-Eze
46c Hexagon socket head cap screw M10 x 30 40
48 Split cone nut M30 x 1 70
58a Hexagon socket head cap screw M10 x 25 62 Thread-Eze

English (GB)
8
5. Service tools
5.1 Special tools
ABCD
EFGH
IJKL
MNOP
QRS
Pos. Designation For pos. Description Part number
ATool for dismantling and assembly of
chamber stack, with pin
CR, CRN SF 32 ~ SV0003-3
SV0003
CR, CRN SF 45 ~ SV0003-4
CR, CRN SF 64 ~ SV0003-5
CR, CRN SF 90 ~ SV0003-2
B Tool for fixation of chamber stack
CR, CRN SF 32 96855938
CR, CRN SF 45 96856251
CR, CRN SF 64 96901146
CR, CRN SF 90 96936273
C Punch 47 SV0015
D Adjusting fork 105 985924
E Key for split cone nut 48 34 mm SV0004
F Lifting tool 51 97536386
GPuller for bottom bearing 47 SV0002
Hexagon socket head cap screw for puller M8 x 50 ID6595
H Hook spanner 49 SV0031

English (GB)
9
5.2 Standard tools
5.3 Torque tools
Pos. Designation For pos. Description Part number
I Tee key
3 mm SV0153
5 mm SV0124
6 mm SV0050
8 mm SV0051
J Hexagon head driver
5 mm SV0296
6 mm SV0297
8 mm SV0298
1/2" SV0094
5/8" SV0093
K Hexagon socket
13 mm SV0413
19 mm SV0419
24 mm SV0424
L Ring/open-end spanner
10 mm SV0083
13 mm SV0055
19 mm SV0054
24 mm SV0122
M Pin for torque wrench 14 9 x 12 mm SV0403
N Ratchet insert tool 9 x 12 mm SV0295
O Hexagon key
8 mm SV0032
5/8" SV0095
1/2" SV0096
P Pinch bar 105 SV5201
Q Screwdriver 9 mm SV0804
R Plastic hammer 2 No. 2 SV0349
Pos. Designation For pos. Description Part number
S Torque wrench
1-6 Nm SV0438
4-20 Nm SV0292
20-100 Nm SV0269

English (GB)
10
6. Dismantling and assembly
6.1 General information
Position numbers
Position numbers of parts (digits) refer to drawings in section
8. Exploded views. Position numbers of tools (letters) refer to
section 5. Service tools.
Before dismantling
• Disconnect the electricity supply to the motor.
• Close the isolating valves, if fitted, to avoid draining the
system.
• Remove the electric cable in accordance with local
regulations.
• Note the centre of gravity of the pump to prevent it from
overturning. This is especially important in the case of long
pumps.
Before assembly
Gaskets and O-rings should always be replaced when the pump
is overhauled.
• Clean and check all parts.
• Order the necessary service kits.
• Replace defective parts with new parts.
During assembly
Before assembly, clean and check all parts. Parts that are
defective should be replaced by new parts.
Lubricate and tighten screws and nuts to the torque stated.
See section 4. Torques and lubricants.
The Grundfos centrifugal pumps, types CR, CRN 32, 45, 64 and
90, are multi-stage in-line pumps.
Position numbers, see sections 7. Positions and 5. Service tools.
Order the necessary service kits.
Gaskets and O-rings should always be replaced when the pump
is overhauled.
6.2 Replacement of motor
6.2.1 Dismantling
Remove the screws (pos. 7a) and the coupling guards (pos. 7).
Keep the shaft seal in position on the shaft by inserting the
adjusting fork (pos. D) between the shaft seal (pos. 105) and the
seal carrier (pos. 58). See fig. 2.
Fig. 2 Shaft seal
Remove the screws (pos. 9) and the coupling (pos. 10a).
Remove the screws (pos. 28) and the nuts (pos. 29).
Carefully lift the motor free of the pump using lifting equipment
suitable for the motor size.
6.2.2 Assembly
Before assembly, clean all parts.
Fit the motor, and turn it to the required terminal box position.
Lubricate the screws (pos. 28) with Thread-Eze. Fit and cross-
tighten them to the torque stated. See section 4. Torques and
lubricants.
Before fitting the coupling, check that the adjusting fork (pos. D)
is still inserted between the shaft seal (pos. 105) and the seal
carrier (pos. 58).
Fit the coupling (pos. 10a) on the shaft so that the top of the
pump shaft is flush with the bottom of the coupling. See fig. 3.
Fig. 3 Coupling
Lubricate the hexagon socket head cap screws (pos. 9). Fit the
screws by hand and leave loose.
Check that the gaps either side of the coupling halves are
identical.
Tighten the hexagon socket head cap screws (pos. 9) two and
two (one side at a time). See section 4. Torques and lubricants.
Pull the adjusting fork (pos. D) free of the shaft, turn it and press it
on to one of the screws (pos. 58a).
Fit the coupling guards (pos. 7), and fasten them with the screws
(pos. 7a).
TM01 1927 0698
105
58
D
TM01 1930 0698

English (GB)
11
6.3 Replacement of motor stool
6.3.1 Dismantling
Remove the screws (pos. 7a) and the coupling guards (pos. 7).
Keep the shaft seal in position on the shaft by inserting the
adjusting fork (pos. D) between the shaft seal (pos. 105) and the
seal carrier (pos. 58). See fig. 2.
Remove the screws (pos. 9) and the coupling (pos. 10a).
Remove the screws (pos. 28) and the nuts (pos. 29).
Carefully lift the motor free of the pump using lifting equipment
suitable for the motor size.
Remove the screws (pos. 2d) and the motor stool (pos. 1a).
6.3.2 Assembly
Before assembly, clean all parts.
Fit the motor stool (pos. 1a), and turn it to the required position.
Lubricate the screws (pos. 2d). Fit the screws, and cross-tighten
them. See section 4. Torques and lubricants.
Fit the motor, and turn it to the required terminal box position.
Lubricate the screws (pos. 28) with Thread-Eze. Fit and cross-
tighten them to the torque stated. See section 4. Torques and
lubricants.
Before fitting the coupling, check that the adjusting fork (pos. D)
is still inserted between the shaft seal (pos. 105) and the seal
carrier (pos. 58).
Fit the coupling (pos. 10a) on the shaft so that the top of the
pump shaft is flush with the bottom of the coupling. See fig. 3.
Lubricate the hexagon socket head cap screws (pos. 9). Fit the
screws by hand and leave loose.
Check that the gaps either side of the coupling halves are
identical.
Tighten the hexagon socket head cap screws (pos. 9) two and
two (one side at a time). See section 4. Torques and lubricants.
Pull the adjusting fork (pos. D) free of the shaft, turn it and press it
on to one of the screws (pos. 58a).
Fit the coupling guards (pos. 7), and fasten them with the screws
(pos. 7a).
6.4 Replacement of coupling
6.4.1 Dismantling
Remove the screws (pos. 7a) and the coupling guards (pos. 7).
Keep the shaft seal in position on the shaft by inserting the
adjusting fork (pos. D) between the shaft seal (pos. 105) and the
seal carrier (pos. 58). See fig. 2.
Remove the screws (pos. 9) and the coupling (pos. 10a).
6.4.2 Assembly
Before assembly, clean all parts.
Before fitting the coupling, check that the adjusting fork (pos. D)
is still inserted between the shaft seal (pos. 105) and the seal
carrier (pos. 58).
Fit the coupling (pos. 10a) on the shaft so that the top of the
pump shaft is flush with the bottom of the coupling. See fig. 3.
Lubricate the hexagon socket head cap screws (pos. 9). Fit the
screws by hand and leave loose.
Check that the gaps either side of the coupling halves are
identical.
Tighten the hexagon socket head cap screws (pos. 9) two and
two (one side at a time). See section 4. Torques and lubricants.
Pull the adjusting fork (pos. D) free of the shaft, turn it and press it
on to one of the screws (pos. 58a).
Fit the coupling guards (pos. 7), and fasten them with the screws
(pos. 7a).
6.5 Replacement of shaft seal
6.5.1 Dismantling
Remove the screws (pos. 7a) and the coupling guards (pos. 7).
Remove the screws (pos. 9) and the coupling (pos. 10a).
Remove the screws (pos. 58a) and the seal carrier (pos. 58).
Clean the shaft end. Loosen the three screws (pos. 113) so that
they do not touch the shaft. See fig. 4.
The screws should be loosened only so much that the shaft seal
can be removed from the shaft.
Loosen the shaft seal (pos. 105) from the pump head using two
screwdrivers. See fig. 4. Pull it off the shaft.
Fig. 4 Shaft seal
TM01 2027 0998
105
113

English (GB)
12
6.5.2 Assembly
Clean and smooth the shaft before fitting the shaft seal. Use the
plastic holder and emery cloth supplied with the shaft seal kit.
Apply O-ring grease to the shaft end and the O-ring of the shaft
seal (pos. 105). Press the shaft seal down on the shaft and
against the pump head.
Remove excess grease from the shaft end using a cloth.
Fit the seal carrier (pos. 58).
Lubricate the screws (pos. 58a). Fit and cross-tighten the screws.
See section 4. Torques and lubricants.
Press the pump shaft down, and fasten the shaft seal on the shaft
with the screws (pos. 113). See fig. 2.
Lift the pump shaft with the lifting tool (pos. F), and insert two
adjusting forks (pos. D) from opposite directions between the
shaft seal (pos. 105) and the seal carrier (pos. 58). See fig. 5.
Fig. 5 Insertion of adjusting forks
Loosen the screws (pos. 113), see fig. 4, and the shaft will drop
slightly. Lift the shaft up again to top position using the lifting tool
(pos. F), and tighten the screws (pos. 113), see fig. 4, on the shaft
seal. Remove one of the adjusting forks (pos. D) and the lifting
tool (pos. F).
Fit the coupling (pos. 10a) on the shaft so that the top of the
pump shaft is flush with the bottom of the coupling. See fig. 3.
Lubricate the hexagon socket head cap screws (pos. 9). Fit the
screws by hand and leave loose.
Check that the gaps either side of the coupling halves are
identical.
Tighten the hexagon socket head cap screws (pos. 9) two and
two (one side at a time). See section 4. Torques and lubricants.
Pull the second adjusting fork (pos. D) free of the shaft, turn it and
press it on to one of the screws (pos. 58a).
Fit the coupling guards (pos. 7), and fasten them with the screws
(pos. 7a).
6.6 Replacement of pump head
6.6.1 Dismantling
Remove the screws (pos. 7a) and the coupling guards (pos. 7).
Remove the screws (pos. 9) and the coupling (pos. 8).
Remove the screws (pos. 28).
Carefully lift the motor and the motor stool (pos. 1a) free of the
pump using lifting equipment suitable for the motor size.
Remove the screws (pos. 58a) and the seal carrier (pos. 58).
Clean the shaft end. Loosen the three screws (pos. 113),
see fig. 4, so that they do not touch the shaft.
The screws should be loosened only so much that the shaft seal
can be removed from the shaft.
Loosen the shaft seal (pos. 105) from the pump head using two
screwdrivers. See fig. 4. Pull it off the shaft.
Loosen and remove nuts (pos. 26d) and washers (pos. 26c) using
a 24 mm ring/open-end spanner (pos. L).
Lift up and remove the pump head (pos. 2). To loosen the pump
head, use a plastic hammer (pos. R) and knock it free of the outer
sleeve (pos. 55).
6.6.2 Assembly
Fit the upper O-ring (pos. 37) on the pump head and apply
grease.
Carefully fit the pump head and make sure the upper O-ring
(pos. 37) is still mounted in the slotted ring on the pump head.
Use a plastic hammer (pos. R) to make sure the pump head is
mounted correctly.
Fit the washers (pos. 26c).
Lubricate the nuts (pos. 26d). Fit and cross-tighten the nuts.
See section 4. Torques and lubricants.
Clean and smooth the shaft before fitting the shaft seal. Use the
plastic holder and emery cloth supplied with the shaft seal kit.
Apply O-ring grease to the shaft end and the O-ring of the shaft
seal (pos. 105). Press the shaft seal down on the shaft and
against the pump head.
Remove excess grease from the shaft end using a cloth.
Fit the seal carrier (pos. 58).
Lubricate the screws (pos. 58a). Fit and cross-tighten the screws.
See section 4. Torques and lubricants.
Press the pump shaft down, and fasten the shaft seal on the shaft
with the screws (pos. 113). See fig. 4.
Lift the pump shaft with the lifting tool (pos. F), and insert two
adjusting forks (pos. D) from opposite directions, between the
shaft seal (pos. 105) and the seal carrier (pos. 58).
Loosen the screws (pos. 113), see fig. 4, and the shaft will drop
slightly. Lift the shaft up again to top position using the lifting tool
(pos. F), and tighten the screws (pos. 113), see fig. 4, on the shaft
seal. Remove one of the adjusting forks (pos. D) and the lifting
tool (pos. F).
Fit the motor, and turn it to the required terminal box position.
Lubricate the screws (pos. 2d). Fit and cross-tighten them to the
torque stated. See section 4. Torques and lubricants.
Fit the coupling (pos. 10a) on the shaft so that the top of the
pump shaft is flush with the bottom of the coupling. See fig. 3.
Lubricate the hexagon socket head cap screws (pos. 9). Fit the
screws by hand and leave loose.
Check that the gaps either side of the coupling halves are
identical.
Tighten the hexagon socket head cap screws (pos. 9) two and
two (one side at a time). See section 4. Torques and lubricants.
Pull the second adjusting fork (pos. D) free of the shaft, turn it and
press it on to one of the screws (pos. 58a).
Fit the coupling guards (pos. 7), and fasten them with the screws
(pos. 7a).
TM05 5872 4112

English (GB)
13
6.7 Replacement of chamber stack
6.7.1 Dismantling
Remove the pump head. See section 6.6 Replacement of pump
head.
Remove the intermediate ring (pos. 2a), if fitted.
Remove the outer sleeve.
Carefully pull the chamber stack up and completely free of the
base (pos. 6).
Remove the O-ring (pos. 37) from the base.
6.7.2 Assembly
Before assembly, clean all parts.
Apply O-ring grease to the new O-rings (pos. 37), and fit the
O-rings in the base (pos. 6) and the pump head (pos. 2).
Carefully fit the chamber stack into the base (pos. 6), and
displace the straps 45 ° in relation to the staybolts. See fig. 6.
Fig. 6 Placement of straps
Fit the outer sleeve (pos. 55) into the base (pos. 6).
Fit the intermediate ring (pos. 2a), if fitted.
Fit the pump head (pos. 2) with the air vent screw (pos. 18) in its
previous position.
Fit the washers (pos. 26c).
Lubricate the nuts (pos. 26d). Fit and cross-tighten the nuts.
See section 4. Torques and lubricants.
Continue the assembly. See section 6.6 Replacement of pump
head.
6.8 Chamber stack
6.8.1 Dismantling of chamber stack
Place the tool for dismantling and assembly of chamber stack
(pos. A) in a vice, and tighten it. Place the tool for fixation of
chamber stack (pos. B) fitting the pump, see section 5. Service
tools, into the tool.
1. Pull the chamber stack out of the outer sleeves (pos. 55) and
place it in the holder according to fig. 7. Make sure the
chamber stack engages with the holder.
2. Fit the locking pin in the hole marked "Dismantling".
Fig. 7 Positioning the chamber stack in the holder
3. Remove screws (pos. 46c) and washers (pos. 46d).
4. Remove straps (pos. 26) and outlet part (pos. 46).
6.8.2 Dismantling chambers
Depending on their construction, dismantle the chambers
according to the instructions below. The symbols refer to section
6. Dismantling and assembly
Chamber without bearing
1. Loosen chamber (pos. 4) from the chamber below using a
screwdriver, and remove it.
2. Hold impeller (pos. 49) with the hook spanner, and slacken
split cone nut (pos. 48) using the key for split cone nut.
Turn the key around, and knock the nut to loosen the impeller
from split cone (pos. 48a).
3. Pull the split cone nut, split cone and impeller off the shaft.
Chamber with bearing
Fig. 8 Chamber with bearing
1. Loosen chamber (pos. 4a) from the chamber below or inlet
part (pos.44) using a screwdriver.
2. Loosen bearing (pos. 47a) from split cone nut (pos. 48) and
pull it off the shaft.
3. Hold impeller (pos. 49) with the hook spanner, and slacken
split cone nut (pos. 48) using the key for split cone nut.
Turn the key around, and knock the nut to loosen the impeller
from split cone (pos. 48a).
4. Pull the split cone nut, split cone and impeller off the shaft.
5. When the last impeller has been removed, inlet part (pos. 44)
can be lifted off the holder.
Note
The intermediate ring is only fitted on pump size
CRN 45 SF.
TM05 4869 4112
Note
The intermediate ring is only fitted on pump size
CRN 45 SF.
TM06 0180 5013

English (GB)
14
6.8.3 Assembly of chamber stack
Before assembly, clean and check all parts. Parts that are
defective or do not comply with the measurements due to wear
should be replaced by new parts.
Neck ring
See check measurements below.
It must be possible to move the neck ring freely (sideways)
between the neck ring retainer and the cup.
Chamber stack
Place the tool for dismantling and assembly of chamber stack
(pos. A) in a vice, and tighten it. Place the tool for fixation of
chamber stack (pos. B) fitting the pump, see section 5. Service
tools, into the tool.
When assembling the chamber stack, use the hole in the tool
marked "Assembly". See fig. 9.
Fig. 9 Tool for dismantling and assembly of chamber stack
Place the shaft in the tool.
Turn the shaft so that the hole in the shaft and the hole in the tool
marked "Assembly" are aligned. Fit the pin into the hole to hold
the shaft.
Fit the inlet part (pos. 44), and turn it so that the fixing lugs for
straps (pos. 26a) on the inlet part are above the cutouts in the
tool. Make sure that the inlet part engages with the tool.
Continue the assembly as follows:
6.8.4 Assembling chambers
Depending on their construction, dismantle the chambers
according to the instructions below. The symbols refer to
overview on page 15.
Chamber without bearing
Fig. 10 Chamber without bearing
1. Fit impeller (pos. 49) and press it home.
2. Fit split cone (pos. 48a) and knock it into the impeller hub
using the key for split cone nut.
3. Hold the impeller with the hook spanner. Fit and tighten split
cone nut (pos. 48).
4. Fit chamber (pos. 4a) and press it home against the chamber
below, or inlet part (pos 44)
Chamber with bearing
Fig. 11 Chamber with bearing
1. Fit impeller (pos. 49) and press it home.
2. Fit split cone (pos. 48a) and knock it into the impeller hub
using the key for split cone nut.
3. Hold the impeller with the hook spanner. Fit and tighten split
cone nut (pos. 48).
4. Slide bearing (pos. 47a) over the split cone nut. It must
engage with the split cone nut.
5. Fit chamber (pos. 4a) and press it home against the chamber
below or inlet part (pos. 44).
Outlet part
Fig. 12 Outlet part
1. Place outlet part and align the holes for the straps with the
fixing lugs for straps in the inlet part.
2. Fit straps (pos. 26a), washers (pos. 46d), and cross-tighten
screws (pos. 46c).
6.9 Pump head and shaft seal
1. Replace O-ring (pos. 37).
2. Fit pump head on outer sleeves (pos. 55).
3. Fit washers (pos. 26c) and cross-tighten nuts (26d).
4. Carefully press shaft seal (pos. 105) down the shaft and in the
pump head.
5. Fit retainer (pos. 58) and cross-tighten screws (58a).For
adjustment of shaft seal see section 6.5 Replacement of shaft
seal. Order of assembly, chambers and impellers
TM01 1955 2201
Pump Nominal height X [mm] Tolerance [mm]
CR, CRN 32 SF 10.1
± 0.2
CR, CRN 45 SF 15.5
CR, CRN 64 SF 11.5
CR, CRN 90 SF 12.1
TM01 2028 0998
X
Caution
Be careful when positioning the chambers on the
shaft. The bearings are fragile and cannot stand
blows or contact with the shafts.

English (GB)
15
6.10 CRN 32 SF order of assembly
The table shows the assembly order of the chamber stacks by
means of symbols.
Order of assembly, chambers and impellers
TM06 5215 3515TM06 5211 3515TM06 5210 3515
9 13
TM06 5212 3515TM06 5213 3515TM065214 3515

English (GB)
16
6.11 CRN 45 SF order of assembly
The table shows the assembly order of the chamber stacks by
means of symbols.
Order of assembly, chambers and impellers
TM05 3401 1312
TM05 3403 1312TM05 3404 1312
7 12
TM05 3405 1312TM05 3406 1312TM05 3407 1312

English (GB)
17
6.12 CRN 64 SF order of assembly
The table shows the assembly order of the chamber stacks by
means of symbols.
Order of assembly, chambers and impellers
TM05 4124 2012
TM05 4126 2012TM05 4127 2012
4 7
TM05 4128 2012TM05 4129 2012TM05 4130 2012

English (GB)
18
6.13 CRN 90 SF order of assembly
The table shows the assembly order of the chamber stacks by
means of symbols.
Order of assembly, chambers and impellers
TM05 4131 2012
TM05 4133 2012TM05 4134 2012
3 5
TM05 4135 2012TM05 4136 2012TM05 4137 2012TM05 4137 2012

English (GB)
19
7. Positions
Pos. Designation
1a Motor stool
2 Pump head
2a Intermediate ring
2d Hexagon socket head cap screw
4 Intermediate chamber
4a Chamber with bearing
6Base
6c Hexagon socket head cap screw
6e Corrugated spring for base
6h Washer
7 Coupling guard
7a Screw
9 Hexagon socket head cap screw
10a Coupling half
18 Vent screw
23 Plug
25 Drain plug
25a O-ring
26 Staybolt
26a Strap
26c Washer
26d Nut
28 Hexagon head bolt
28b Washer
29 Nut
37 O-ring
44 Inlet part
46 Outlet part
46a O-ring
46c Hexagon socket head cap screw
46d Washer
47 Bearing ring, stationary
47b Bearing ring, rotating
47c Washer
47e Washer
47f Hexagon socket head cap screw
48 Split cone nut
48a Split cone
49 Impeller
51 Pump shaft
55 Outer sleeve
56 Base plate
58 Seal carrier
58a Hexagon socket head cap screw
76 Nameplate
76a Rivet
105 Shaft seal
47a Bearing with driver
190 Lifting lug

English (GB)
20
8. Exploded views
Exploded view of CRN 32 and 64 SF
TM06 5250 4515