CM, CME
Service instructions
GRUNDFOS INSTRUCTIONS
2
English (GB) Service instructions
Caution
Note
Original service instructions.
CONTENTS
1. Symbols used in this document
2. Type identification
2.1 Nameplate
2.2 Type key
3. Tightening torques and lubricants
4. Service tools
4.1 Standard tools
4.2 Torque tools
5. Dismantling and assembly
5.1 General information
5.2 CM 1, 3, 5, cast iron
5.3 CM 1, 3, 5, stainless steel
5.4 CM 10, 15, 25, cast iron
5.5 CM 10, 15, 25, stainless steel
5.6 MG 71 and MG 80 motors
5.7 MG 90, MG 100, MG 112 and MG 132 motors
5.8 Checking and replacing impellers and chambers
6. Fault finding
7. Drawings
7.1 CM 1, 3, 5
7.2 CM 10, 15, 25
8. Order of assembly for chambers and impellers
8.1 Key for CM 1, 3, 5
8.2 CM 1, 3, 5, cast iron
8.3 CM 1, 3, 5, stainless steel
8.4 Key for CM 10, 15, 25
8.5 CM 10, 15, 25, cast iron
8.6 CM 10, 15, 25, stainless steel
Page
10
12
13
13
14
15
16
16
18
20
20
20
20
21
21
22
English (GB)
3
4
4
5
6
7
7
7
8
8
8
9
1. Symbols used in this document
Warnin g
If these safety instructions are not observed, it
may result in person al in jury.
If these safety instructions are not observed, it
may result in malfunction or damage to the
equipment.
Notes or instructions that make the job easier and
ensure safe operation.
3
English (GB)
Note
Model
IP
T
Type
P
max
T
liq,max
bar
MPa
PSI
Q
nom
H
nom
H
max
m³/h GPM
Env
m
m
PSI
PSI
Q
nom
H
nom
H
max
m³/h GPM
m
m
PSI
PSI
°C
°F
50 Hz
95120839
60 Hz
3
4
5
5
6
7
7
8
9
10 10
11 11
12 12
6
6
1
10
11
12
10
11
12
2
Amb
°C
°F
Insulation class
2. Type identification
This section shows the nameplate, the type key and the codes
that can appear in the variant code.
2.1 Nameplate
Fig. 1 Pump nameplate
As codes can be combined, a code position may
contain more than one code (letter).
TM04 0355 0908
112
50 Hz 60 Hz
~/V
I max
I 1/1
P2
3
4
5
kW
Capacitor
2
3
/A
4
/A
5
6 6
HP kW HP
uF / V
Fig. 2 Motor nameplate
The pump and motor nameplates are positioned on the motor fan
cover or terminal box.
The data and information on the pump nameplate are described
in the table below.
Pos. Description
1 Pump type
2 Pump model
Environmental rating for enclosures based on NEMA
3
type designations
4 Enclosure class
5 Maximum ambient temperature [°C] / [°F]
6 Maximum system pressure [bar] / [psi] / [MPa]
7 Maximum liquid temperature [°C] / [°F]
8 Insulation class
9 Motor protection
3
10 Rated flow [m
/h] / [GPM]
11 Head at rated flow [m] / [psi]
12 Maximum head [m] / [psi]
The data and information on the motor nameplate are described
in the table below.
2
~/V
I max
I 1/1
P2
3
4
5
Capacitor
2
3
/A
4
/
A
5
95120836
uF / V
TM04 0356 0908
Pos. Description
1 Number of phases
2 Voltage [V]
3 Maximum current [A]
4 Rated current [A]
5 Power output [kW] / [hp]
6
4
Single-phase pumps only:
Capacitor size [F] and voltage [V]
2.2 Type key
Note
CM, CME
Example CME 10 - 8 A - R - A - E - A V B E X - X - X - X
Type range Sensor
CM Centrifugal Modular Sensor designation
CM with integrated frequency
CME:
converter
Rated flow rate A: Cable glands
Rated flow rate at 50 Hz [m3/h]
Number of impellers C: With cable
Pump version Motor information
A: Basic version A: Standard motor (IP55)
B: Oversize motor (one flange size larger) B:
E: Pumps with certificates and other approvals C: IP54
HS: High-pressure pump with high-speed MGE motor D: Pt100 in stator
I: Altered pressure class E: Angular contact bearing
J: Pump with a different maximum speed F: Motor heater
M: Magnet-driven pump G:
N: CME pump with sensor (see code for "Sensor") H:
P: Undersize motor (one flange size smaller)
T: Oversize motor (two flange sizes larger) Supply voltage
V: CME pump for Multi-E A: 1 x 220 V, 60 Hz
X: Special pump B: 1 x 115/230 V, 60 Hz
C: 1 x 220-240 V, 50 Hz
Pipe connection D: 1 x 127 V, 60 Hz
C:
Tri-Clamp
F: DIN flange F: 3 x 220-240/380-415 V, 50 Hz
G: ANSI flange G:
J: JIS flange H: 3 x 575 V, 60 Hz
P: PJE coupling I: 3 x 400 V, 50/60 Hz
R: Whitworth thread Rp (ISO 7/1) J: 3 x 380-415 V, 50 Hz; 440-480 V, 60 Hz
S: Internal NPT thread K: 1 x 220-240 V, MGE motor
Materials in contact with pumped liquid M: 1 x 208-230 V, MLE motor
Inlet and discharge parts EN-GJL-200 N: 3 x 460-480 V, MLE motor
A:
Pump shaft EN 1.4057/AISI 431 O:
Impellers/chambers EN 1.4301/AISI 304
Sleeve EN 1.4401/AISI 316 Material of secondary seal
G:
Pump shaft EN 1.4401/AISI 316 E: EPDM (ethylene propylene)
Impellers/chambers EN 1.4401/AISI 316 K: FFKM (perfluor)
Sleeve EN 1.4301/AISI 304 V: FKM (fluor)
I:
Pump shaft EN 1.4301/AISI 304
Impellers/chambers EN 1.4301/AISI 304 Material of stationary shaft seal part
X: Special version B: Carbon, synthetic resin-impregnated
Rubber parts in pump (excl. neck ring and shaft seal)
E: EPDM (ethylene propylene) Material of rotating seal face
K: FFKM (perfluor) Q: Silicon carbide (SIC)
V: FKM (fluor) V: Aluminium oxide (AI203)
Note: Gaskets between chambers of cast-iron versions are made of
Tesni t B A - U.
®
Q: Silicon carbide (SIC)
Shaft seal type designation
A: O-ring seal with fixed driver
E: 3 x 208-230/440-480 V, 60 Hz
L: 3 x 380-480 V, MGE motor
Mains plug
B: Harting plug
Phase-insulated motor for use with
frequency converter
Three-phase motor with overload
protection
Single-phase motor with no overload
protection
3 x 200/346 V, 50 Hz; 200-220/346-380 V,
60 Hz
3 x 220-240/380-415 V, 50 Hz
3 x 220-255/380-440 V, 60 Hz
English (GB)
The type key cannot be used for ordering, as not all combinations are possible.
5
English (GB)
3. Tightening torques and lubricants
Pos. Designation Quantity Dimensions Torque [Nm] Lubricant
2b
11 O-ring 2 ∅18.5 x 2.0 - -
25 Plug 2 - 10 - 12 -
26
28g Screw 4 M6 x 14 8 - 10 THREAD-EZE
31
67 Lock nut 1 M8 16 - 18 -
102 O-ring 1 ∅17.86 x 2.62 - V7140084
103 Seal faces 1 - -
107 O-ring 1 ∅11.5 x 3.18 - Rocol 22
152 Screw
155 Bearing cover plate 1 - - Rocol 22
157a
158a O-ring 1 ∅35.4 x 1.97 - Rocol 22
159
159a Seal ring 1 - - Castrol LMX grease
181
Screw, CM 1, 3, 5 2 M8 x 40 16 - 18 THREAD-EZE
Hexagon socket head cap screw CM 10, 15, 25 2 M8 x 80 16 - 18 THREAD-EZE
Staybolt, CM 1, 3, 5, cast iron 4 M6 12 - 14 -
Staybolt, CM 1, 3, 5, stainless steel 4 M8 12 - 14 -
Staybolt, CM 10, 15, 25, cast iron 4 M8 25-27 THREAD-EZE
Staybolt, CM 10, 15, 25, stainless steel 4 M8 20-22 -
O-ring, CM 1, 3, 5 1 ∅114.0 x 3.90 - Rocol 22
O-ring, CM 10, 15, 25 1 ∅153.2 x 4.70 - Rocol 22
Silicone oil, 350 cSt,
food grade
2 M4 x 8 2.7 - 3.3 4 M5 x 12 3.5 - 4 -
Gasket, MG 71, MG 80 1 ∅114.8 / 121.2 x 0.25 - -
Gasket, MG 90 2 ∅141.2 / 145.5 - -
Gasket, MG 100 - - - -
O-ring, MG 71, MG 80 1 ∅32 x 2
- Rocol 22O-ring, MG 90, MG 100 1 ∅52 x 3.0
O-ring, MG 112, 132 1 ∅62 x 3.0
Screw, MG 71, MG 80 4 M6 x 16 5 - 8
Staybolt, MG 90 4 M5 x 220
Staybolt, MG 90L 4 M5 x 260
Staybolt, MG 100 4 M5 x 270
Staybolt, MG 112 4 M6 x 288
4.5 - 6
THREAD-EZE
THREAD-EZE, part number 00SV9997 (0.5 l).
Rocol 22, part number 00RM2924 (1 kg).
Castrol LMX grease, part number 00RM4311.
Silicone oil, 350 cSt, food grade 00SV0862 (1 l).
6
4. Service tools
ABCD
EFGH
IJKL
MN
English (GB)
4.1 Standard tools
Pos. Designation For pos. Further information Part number
A Screwdriver 103, 156 - SV0803
B Cross-head screwdriver 181 Ph2 x 100 SV0279
C Torx screwdriver J TX30 x 115 mm SV0335
D Ring/open-end spanner
E Hexagon key 26
F Puller for bearing 153, 154 - -
G Plastic hammer 156 - SV0349
H Ratchet handle 156 - 96777072
I Hexagon head driver
J Bits kit 28g, 152, 181 - SV2010
64c 15 mm -
67 13 mm SV0055
5 mm 6 mm SV0196
26
181 M5 - 4 mm -
M6 - 5 mm SV0296
M8 - 6 mm SV0297
4.2 Torque tools
Pos. Designation For pos. Fu rther information Part number
K Torque screwdriver J 1-6 Nm SV0438
L Ring insert tool N 13 mm - 9 x 12 mm SV0294
M Ratchet insert tool I 9 x 12 mm - 1/2" SV0295
N Torque wrench L, M
9 x 12 mm - 4-20 Nm SV2092
9 x12 mm - 20-100 Nm SV0269
7
English (GB)
Note
Note
Note
Note
Note
5. Dismantling and assembly
5.1 General information
If it is necessary to dismantle the pump, either because it is
choked or damaged, please follow the instructions in the following
sections.
Position numbers of parts (digits) refer to section 7. Drawings;
position numbers of tools (letters) refer to section 4. Service
tools.
Before dismantling the pump
• 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.
Before assembly
• Clean and check all parts.
• Replace defective parts by new parts.
• Order the necessary service kits.
• Gaskets and O-rings should always be replaced when the
pump is overhauled.
During assembly
• Lubricate and tighten screws and nuts to correct torque.
See section 3. Tightening torques and lubricants.
5.2 CM 1, 3, 5, cast iron
5.2.1 Dismantling
1. Remove staybolts (pos. 26).
2. Remove inlet part (pos. 6).
3. Remove gasket (pos. 139b) and chamber (pos. 4e).
4. Hold clamp (pos. 64c), and remove nut (pos. 67).
5. Remove lock washers (pos. 66) and clamp (pos. 64c).
6. Remove impeller (pos. 49).
7. Remove bearing ring (pos. 47a) and short spacing pipe
(pos. 64a).
8. Remove chamber for bearing (pos. 4a), gasket (pos. 139b),
impeller (pos. 49) and spacing pipe (pos. 64).
9. Continue the dismantling until shaft seal (pos. 105).
10.Remove shaft seal (pos. 105). See fig. 3.
Step 7 applies only to pumps with eight stages.
Step 8 applies only to pumps with eight stages.
5.2.2 Assembly
Assembly of MG 71 and MG 80, see section 5.6.2.
Assembly of MG 90 and MG 100, see section 5.7.2.
1. Fit O-ring (pos. 102) on the stationary shaft seal part.
See fig. 4. For correct lubricant, see section 3. Tightening
torques and lubricants.
TM04 4322 1209
Fig. 4 Fitting the O-ring on the stationary shaft seal part
2. Press the stationary shaft seal part home. See fig. 5.
Warnin g
Do not touch the seal face.
TM04 4436 1209
Fig. 5 Fitting the stationary shaft seal part (only SiC/SiC)
3. Fit the rotating shaft seal part (pos. 104) so that the seal face
touches the stationary part.
Warnin g
Do not touch the seal face.
4. Fit O-ring (pos. 107) into the rotating shaft seal part
(pos. 104). For correct lubricant, see section 3. Tightening
torques and lubricants.
5. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 6.
Fig. 3 Exploded view of shaft seal
Dismantling of MG 71 and MG 80,
see section 5.6.1.
Dismantling of MG 90 and MG 100,
see section 5.7.1.
It is advisable always to replace wear rings
(pos. 45) and wear ring retainers (pos. 65).
See section 5.8.
8
TM04 4327 1209
TM04 4325 1209
Fig. 6 Fitting the stop ring
6. Fit spring (pos. 108) and driver (pos. 112). See fig. 7.
Note
Note
Note
Note
Note
Note
Note
Fig. 7 Fitting the spring and driver
7. Fit impeller (pos. 49), spacing pipe (pos. 64), gasket
(pos. 139b) and chamber plate (pos. 4f).
8. Continue the assembly until chamber for bearing (pos. 4a).
Step 8 applies only to pumps with eight stages.
9. Fit chamber for bearing (pos. 4a), short spacing pipe
(pos. 64a), gasket (pos. 139b) and bearing ring (pos. 47a).
See section 8. Order of assembly for chambers and impellers.
Step 9 applies only to pumps with eight stages.
10.Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and
nut (pos. 67). See fig. 8.
11.Remove O-ring (pos. 31) and cover plate (pos. 32).
Dismantling of MG 71 and MG 80,
see section 5.6.1.
Dismantling of MG 90 and MG 100,
see section 5.7.1.
It is advisable always to replace wear rings
(pos. 45) and wear ring retainers (pos. 65).
See section 5.8.
TM04 4326 1209
5.3.2 Assembly
Assembly of MG 71 and MG 80, see section 5.6.2.
Assembly of MG 90 and MG 100,
see section 5.7.2.
1. Fit cover plate (pos. 32) and O-ring (pos. 31). Lubricate the
O-ring. See section 3. Tightening torques and lubricants.
2. Fit O-ring (pos. 102) on the stationary shaft seal part.
See fig. 10. See section 3. Tightening torques and lubricants.
Fig. 10 Fitting the O-ring on the stationary shaft seal part
English (GB)
TM04 4322 1909
Fig. 8 Correct fitting of washers
11.Hold clamp (pos. 64c), and tighten nut (pos. 67).
See section 3. Tightening torques and lubricants.
12.Fit chamber (pos. 4e) and gasket (pos. 139b).
13.Fit inlet part (pos. 6).
14.Fit and cross-tighten staybolts (pos. 26).
See section 3. Tightening torques and lubricants.
5.3 CM 1, 3, 5, stainless steel
5.3.1 Dismantling
1. Remove staybolts (pos. 26).
2. Remove clamping flange (pos. 6a) and sleeve (pos. 16).
3. Remove chamber (pos. 4e).
4. Hold clamp (pos. 64c), and remove nut (pos. 67).
5. Remove lock washers (pos. 66) and clamp (pos. 64c).
6. Remove impeller (pos. 49).
7. Remove bearing ring (pos. 47a) and short spacing pipe
(pos. 64a).
Step 7 applies only to pumps with eight or more
stages.
8. Remove chamber for bearing (pos. 4a), impeller (pos. 49) and
spacing pipe (pos. 64).
Step 8 applies only to pumps with eight or more
stages.
9. Continue the dismantling until shaft seal (pos. 105).
10.Remove shaft seal (pos. 105). See fig. 9.
TM02 1057 0501
TM04 4327 1909
Fig. 9 Exploded view of shaft seal
9
English (GB)
Note
Caution
Note
Note
3. Press the stationary shaft seal part home. See fig. 11.
Fig. 11 Fitting the stationary shaft seal part (only SiC/SiC)
4. Fit the rotating shaft seal part (pos. 104) so that the seal face
touches the stationary part.
5. Fit O-ring (pos. 107) into the rotating shaft seal part
(pos. 104). See section 3. Tightening torques and lubricants.
6. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 12.
Warning
Do not touch the seal face.
Warning
Do not touch the seal face.
11.Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and
nut (pos. 67). See fig. 14.
Fig. 14 Correct fitting of washers
12.Hold clamp (pos. 64c), and tighten nut (pos. 67).
See section 3. Tightening torques and lubricants.
13.Fit chamber (pos. 4e), sleeve (pos. 16) and clamping flange
(pos. 6a).
TM04 4435 1909
Do not forget to fit the last chamber (pos. 4e), as
it is possible to assemble the pump without the
last chamber.
14.Fit and cross-tighten staybolts (pos. 26).
See section 3. Tightening torques and lubricants.
5.4 CM 10, 15, 25, cast iron
5.4.1 Dismantling
1. Remove staybolts (pos. 26).
2. Remove inlet part (pos. 6) and gasket (pos. 139b).
3. Hold clamp (pos. 64c), and remove nut (pos. 67).
4. Remove lock washers (pos. 66) and clamp (pos. 64c).
5. Remove impeller (pos. 49) and spacing pipe (pos. 64).
6. Remove chamber (pos. 4).
7. Continue the dismantling until shaft seal (pos. 105).
8. Remove shaft seal (pos. 105). See fig. 15.
TM02 1057 0501
Fig. 12 Fitting the stop ring
7. Fit spring (pos. 108) and driver (pos. 112). See fig. 13.
Fig. 13 Fitting the spring and driver
8. Fit impeller (pos. 49), chamber with holes (pos. 4d) and
spacing pipe (pos. 64).
9. Fit impeller (pos. 49), chamber (pos. 4) and spacing pipe
(pos. 64).
10.Fit impeller (pos. 49), chamber (pos. 4a), short spacing pipe
(pos. 64a) and bearing ring (pos. 47a). See section 8. Order of
assembly for chambers and impellers.
Step 10 applies only to pumps with eight or more
stages.
TM04 4325 1909TM04 4326 1909
TM04 4327 1209
Fig. 15 Exploded view of shaft seal
9. Loosen and remove screws (pos. 2b) and discharge part
(pos. 2).
Dismantling of MG 71 and MG 80,
see section 5.6.1.
Dismantling of MG 90, MG 100, MG 112 and
MG 132, see section 5.7.1.
It is advisable always to replace wear rings
(pos. 45) and wear ring retainers (pos. 65).
See section 5.8.
10
5.4.2 Assembly
Note
Assembly of MG 71 and MG 80, see section 5.6.2.
Assembly of MG 90, MG 100, MG 112 and MG 132,
see section 5.7.2.
1. Fit discharge part (pos. 2).
2. Fit and tighten screws (pos. 2b).
See section 3. Tightening torques and lubricants
3. Fit O-ring (pos. 102) on the stationary shaft seal part.
See fig. 16. See section 3. Tightening torques and lubricants.
Fig. 16 Fitting the O-ring on the stationary shaft seal part
4. Press the stationary shaft seal part home. See fig. 17.
Warning
Do not touch the seal face.
8. Fit spring (pos. 108) and driver (pos. 112). See fig. 19.
Fig. 19 Fitting the spring and driver
9. Fit short spacing pipe (pos. 64a), impeller (pos. 49),
gasket (pos. 139c) and chamber (pos. 4g).
10.Fit gasket (pos. 139b), spacing pipe (pos. 64), impeller
(pos. 49) and chamber (pos. 4).
11.Continue the assembly until clamp (pos. 64c). For correct
fitting of chambers and impellers, see section 8. Order of
assembly for chambers and impe llers .
TM04 4322 1209
12.Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and
nut (pos. 67). See fig. 20.
English (GB)
TM04 4326 1209TM02 1057 0501
Fig. 17 Fitting the stationary shaft seal part (only SiC/SiC)
5. Fit the rotating shaft seal part (pos. 104) so that the seal face
touches the stationary part.
Warning
Do not touch the seal face.
6. Fit O-ring (pos. 107) into the rotating shaft seal part (pos. 104).
See section 3. Tightening torques and lubricants
7. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 18.
Fig. 20 Correct fitting of washers
13.Hold clamp (pos. 64c), and tighten nut (pos. 67).
See section 3. Tightening torques and lubricants.
14.Fit gasket (pos. 139b).
15.Fit inlet part (pos. 6).
16.Fit and cross-tighten staybolts (pos. 26).
TM04 5051 2509
See section 3. Tightening torques and lubricants.
TM04 4325 1209
Fig. 18 Fitting the stop ring
11
English (GB)
Note
Note
Note
Note
5.5 CM 10, 15, 25, stainless steel
5.5.1 Dismantling
1. Remove staybolts (pos. 26).
2. Remove clamping flange (pos. 6a) and sleeve (pos. 16).
3. Remove the chamber plate (pos. 4f).
4. Hold clamp (pos. 64c), and remove nut (pos. 67).
5. Remove lock washers (pos. 66) and clamp (pos. 64c).
6. Remove impeller (pos. 49).
7. Remove spacing pipe (pos. 64e), bearing ring (pos. 47a) and
chamber for bearing (pos. 4a).
8. Continue the dismantling until shaft seal (pos. 105).
9. Remove shaft seal (pos. 105). See fig. 21.
Fig. 21 Exploded view of shaft seal
10.Remove O-ring (pos. 31) and cover plate (pos. 32).
Step 7 applies only to pumps with six or more
stages.
Dismantling of MG 71 and MG 80,
see section 5.6.1.
Dismantling of MG 90, MG 100, MG 112 and
MG 132, see section 5.7.1.
3. Press the stationary shaft seal part home. See fig. 23.
Warnin g
Do not touch the seal face.
Fig. 23 Fitting the stationary shaft seal part (only SiC/SiC)
4. Fit the rotating shaft seal part (pos. 104) so that the seal face
touches the stationary part.
Warnin g
Do not touch the seal face.
TM04 4327 1909
5. Fit O-ring (pos. 107) into the rotating shaft seal part
(pos. 104). For correct lubricant, see section 3. Tightening
torques and lubricants
6. Fit retainer (pos. 111) and stop ring (pos. 111a). See fig. 24.
TM04 4435 1909
It is advisable always to replace wear rings
(pos. 45) and wear ring retainers (pos. 65).
See section 5.8.
5.5.2 Assembly
Assembly of MG 71 and MG 80, see section 5.6.2.
Assembly of MG 90, MG 100, MG 112 and MG 132,
see section 5.7.2.
1. Fit cover plate (pos. 32) and O-ring (pos. 31). Lubricate the
O-ring. See section 3. Tightening torques and lubricants.
2. Fit O-ring (pos. 102) on the stationary shaft seal part.
See fig. 22. For correct lubricant, see section 3. Tightening
torques and lubricants
Fig. 22 Fitting the O-ring on the stationary shaft seal part
Fig. 24 Fitting the stop ring
7. Fit spring (pos. 108) and driver (pos. 112). See fig. 25.
Fig. 25 Fitting the spring and driver
8. Fit short spacing pipe (pos. 64a), chamber with holes (pos. 4d)
TM04 4322 1909
and impeller (pos. 49).
9. Continue the assembly until clamp (pos. 64c). For correct
fitting of chambers and impellers, see section 8. Order of
assembly for chambers and impe llers .
TM04 4325 1909TM04 4326 1909
12
10.Fit clamp (pos. 64c), washers (pos. 66) and nut (pos. 67).
Caution
See fig. 26.
Fig. 26 Correct fitting of washers
11.Hold clamp (pos. 64c), and tighten nut (pos. 67).
See section 3. Tightening torques and lubricants.
12.Fit the chamber plate (pos. 4f).
Do not forget to fit the chamber plate (pos. 4f), as
it is possible to assemble the pump without the
last chamber.
13.Fit sleeve (pos. 16) and clamping flange (pos. 6a).
14.Fit and cross-tighten staybolts (pos. 26). See section
3. Tightening torques and lubricants.
5.6 MG 71 and MG 80 motors
5.6.1 Dismantling
1. Remove screws (pos. 152).
2. Remove fan cover (pos. 151).
3. Remove fan (pos. 156) and seal ring (pos. 159a).
4. Remove screws (pos. 181).
5. Remove motor flange (pos. 156b) and gasket (pos. 157a).
6. Remove diverting disc (pos. 79), O-ring (pos. 158a) and
bearing cover plate (pos. 155).
7. Pull shaft (pos. 51) out of stator housing (pos. 150).
8. Pull bearing (pos. 153) off shaft (pos. 51).
9. Remove O-ring (pos. 159) and spring (pos. 158).
10.Pull bearing (pos. 154) off shaft (pos. 51).
5.6.2 Assembly
1. Push bearing (pos. 154) onto shaft (pos. 51).
2. Fit spring (pos. 158) and O-ring (pos. 159). See fig. 27.
Fig. 27 Correct fitting of spring and O-ring
3. Push bearing (pos. 153) onto shaft (pos. 51).
4. Fit shaft (pos. 51) into stator housing (pos. 150).
5. Fit bearing cover plate (pos. 155), O-ring (pos. 158a) and
diverting disc (pos. 79). Lubricate the surface of the cover
plate (pos. 155) turning against the bearing. Lubricate the
O-ring (pos. 158a).
For correct lubricant, see section 3. Tightening torques and
lubricants.
6. Fit gasket (pos. 157a) and motor flange (pos. 156b).
7. Fit and cross-tighten screws (pos. 181). See section
3. Tightening torques and lubricants.
8. Fit and lubricate the seal ring (pos. 159a).
For correct lubricant, see section 3. Tightening torques and
lubricants.
9. Fit the fan (pos. 156).
10.Fit fan cover (pos. 151).
11.Fit and tighten screws (pos. 152). See section 3. Tightening
torques and lubricants.
5.7 MG 90, MG 100, MG 112 and MG 132 motors
5.7.1 Dismantling
1. Only cast iron pumps: Remove screws (pos. 2b).
2. Only cast iron pumps: Remove discharge part (pos. 2).
3. Remove screws (pos. 152).
4. Remove fan cover (pos. 151).
5. Remove fan (pos. 156) and seal ring (pos. 159a).
6. Remove staybolts (pos. 181).
TM02 1057 0501
7. Remove motor flange (pos. 156b), gasket (pos. 157a) and
bearing cover (pos. 156a).
8. Remove diverting disc (pos. 79), O-ring (pos. 158a) and
bearing cover plate (pos. 155).
9. Pull shaft (pos. 51) out of stator housing (pos. 150).
10.Pull bearing (pos. 153) off shaft (pos. 51).
11.Remove O-ring (pos. 159) and spring (pos. 158).
12.Pull bearing (pos. 154) off shaft (pos. 51).
5.7.2 Assembly
1. Push bearing (pos. 154) onto shaft (pos. 51).
2. Fit spring (pos. 158) and O-ring (pos. 159). See fig. 28.
Fig. 28 Correct fitting of spring and O-ring
3. Push bearing (pos. 153) onto shaft (pos. 51).
4. Fit shaft (pos. 51) into stator housing (pos. 150).
5. Fit bearing cover plate (pos. 155), O-ring (pos. 158a) and
diverting disc (pos. 79). Lubricate the surface of the cover
plate (pos. 155) turning against the bearing. Lubricate the
O-ring (pos. 158a).
For correct lubricant, see section 3. Tightening torques and
lubricants.
6. Fit bearing cover (pos. 156a), gasket (pos. 157a) and motor
flange (pos. 156b).
7. Fit and cross-tighten staybolts (pos. 181). See section
3. Tightening torques and lubricants.
8. Fit and lubricate the seal ring (pos. 159a). For correct
lubricant, see section 3. Tightening torques and lubricants.
9. Fit the fan (pos. 156).
10.Fit fan cover (pos. 151).
TM04 4441 1209
11.Fit and tighten screws (pos. 152). See section 3. Tightening
torques and lubricants.
12.Only cast iron pumps: Fit discharge part (pos. 2).
13.Only cast iron pumps: Fit and tighten screws (pos. 2b). See
section 3. Tightening torques and lubricants.
English (GB)
TM04 4441 1209
13
English (GB)
5.8 Checking and replacing impellers and chamber s
• Check whether it is necessary to replace the impeller due to
friction between wear ring and impeller skirt. If wear has caused
a noticeable (use a finger nail) groove in the impeller skirt, the
impeller should be replaced.
It is advisable always to replace wear rings (pos. 45) and wear
ring retainers (pos. 65) when the chamber stack is dismantled.
• Check whether there is a visible and noticeable (use a finger
nail) edge on the rotating bearing ring.
Fig. 29 Correct fitting of wear ring
Check Replace
Impeller Wear ring/wear ring retainer
1. Prise the wear ring retainer (pos. 65) up and free of the chamber
using a screwdriver.
2. Remove wear ring (pos. 45).
3. Fit a new wear ring in the chamber. See fig. 29.
4. Press a new wear ring retainer on the wear ring and into the
chamber.
It must be possible to move the wear ring free ly (sideways) between
the retainer and the chamber.
Bearing ring
• Replace both bearing rings (pos. 47a) and chamber for bearing
(pos. 4a).
TM02 1182 0601
14
6. Fault finding
Warnin g
Before removing the terminal box cover, make sure that the electricity supply has been switched off.
The pumped liquid may be scalding hot and under high pressure. Before any removal or dismantling of the pump,
the system must therefore be drained, or the isolating valves on either side of the pump must be closed.
Fault Cause Remedy
1. The pump does not run. a) Supply failure. Switch on the switch.
Check cables and cable connections for
defects and loose connections.
b) Fuses are blown. Check cables and cable connections for
defects, and replace the fuses.
c) Motor protection tripped. See 2. a), b), c), d), e), f).
d) Control-current circuit defective. Repair or replace the control-current circuit.
2. Motor-protective circuit breaker has
tripped (trips out immediately when
supply is switched on).
3. The motor-protective circuit breaker
trips out occasionally.
4. The motor-protective circuit breaker
has not tripped out, but the pump is
inadvertently out of operation.
5. The pump performance is unstable. a) Pump inlet pressure too low. Check the inlet conditions of the pump.
6. The pump runs, but gives no water. a) Pump inlet pressure too low. See 5. a).
7. The pump runs backwards when
switched off.
8. The pump runs with reduced
performance.
a) Fuses are blown. See 1. b).
b) Contacts of the motor-protective circuit
breaker or magnet coil defective.
c) Cable connection is loose or faulty. Check cables and cable connections for
d) Motor winding is defective. Repair or replace the motor.
e) The pump is mechanically blocked. Switch off the electricity supply, and clean or
f) The setting of the motor-protective
circuit breaker is too low.
a) The setting of the motor-protective
circuit breaker is too low.
b) Periodic supply failure. See 2. c).
c) Periodically low voltage. Check cables and cable connections for
a) See 1. a), b), d) and 2. e).
b) Inlet pipe is partly blocked by impurities. Remove and clean the inlet pipe.
c) Leakage in inlet pipe. Remove and repair the inlet pipe.
d) Air in inlet pipe or pump. Vent the inlet pipe/pump.
b) Inlet pipe partly blocked by impurities. See 5. b).
c) The foot or non-return valve is stuck in
its closed position.
d) Leakage in inlet pipe. See 5. c).
e) Air in inlet pipe or pump. See 5. d).
a) Leakage in inlet pipe. See 5. c).
b) Foot or non-return valve defective. See 6. c).
c) The foot valve is stuck in completely or
partly open position.
a) Wrong direction of rotation. Three-phase pumps only:
b) See 5. a), b), c), d).
Replace the contacts of the motor-protective
circuit breaker, the magnet coil or the entire
motor-protective circuit breaker.
defects, and replace the fuses.
repair the pump.
Set the motor-protective circuit breaker
according to the rated current of the motor
(I
). See nameplate.
1/1
See 2. f).
defects and loose connections.
Check that the supply cable of the pump is
correctly sized.
Check the inlet conditions of the pump.
Remove and clean, repair or replace the valve.
See 6. c).
Switch off the electricity supply with the
external circuit breaker and interchange two
phases in the pump terminal box.
It is possible to check the direction of rotation
by means of the installation indicator.
Black: The direction of rotation is correct.
White: The direction of rotation is incorrect.
English (GB)
15
English (GB)
7. Drawings
7.1 CM 1, 3, 5
Fig. 30 CM 1, 3, 5, stainless steel
16
TM04 3588 4608
English (GB)
Fig. 31 CM 1, 3, 5, cast iron
TM04 3591 4608
17
English (GB)
7.2 CM 10, 15, 25
Fig. 32 CM 10, 15, 25, stainless steel
18
TM04 3828 5108
English (GB)
Fig. 33 CM 10, 15, 25, cast iron
TM04 3829 5108
19
English (GB)
8. Order of assembly for chambers and impellers
8.1 Key for CM 1, 3, 5
Bearings
Chamber cpl. A
Chamber with bearing cpl. B
Chamber with holes C
Chamber plate D
Chamber without guide vanes E
Impeller F
8.2 CM 1, 3, 5, cast iron
CM 1, 3, 5, cast iron
Pos.
1*DFDFDFDFDFDFDF
2EFAFAFAFAFAFAF
3 EFAFAFAFAFAF
4 EFAFAFAFAF
5 EFAFAFAF
6 EFAFAF
7 EFBF
8 EF
* Pos. 1 is next to the motor.
2345678
Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller
8.3 CM 1, 3, 5, stainless steel
CM 1, 3, 5, stainless steel
Pos.
1*CFCFCFCFCFCFCF
2EFAFAFAFAFAFAF
3E EFAFAFAFAFAF
4 EFAFAFAFAF
5 EFAFAFAF
6 EFAFAF
7 EEFBF
8 EF
9 E
* Pos. 1 is next to the motor.
2345678
Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller
20
CM 1, 3, 5, stainless steel
Pos.
Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller
1*CFCFCFCFCFCF
2AFAFAFAFAFAF
3AFAFAFAFAFAF
4AFAFAFAFAFAF
5AFAFAFAFAFAF
6AFAFAFAFAFAF
7AFAFAFAFAFAF
8BFAFAFAFAFAF
9EFBFAFAFAFAF
10 EFBFAFAFAF
11 E EFBFBFBF
12 EFAFAF
13 EEFAF
14 EEEF
* Pos. 1 is next to the motor.
9 1011121314
English (GB)
8.4 Key for CM 10, 15, 25
Bearings
Chamber cpl. A
Chamber with bearing cpl. B
Chamber with holes C
Impeller located in cast iron component D
Chamber without sand lift E
Chamber plate, SS pumps F
Chamber without guide vanes G
Chamber without guide vanes and sand lift H
Impeller I
8.5 CM 10, 15, 25, cast iron
CM 10, 15, 25, cast iron
Pos.
Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller
1*DIDIDIDIDI
2H EIEIEIEI
3 AIAIAI
4 AIAI
5 AI
* Pos. 1 is next to the motor.
12345
21
English (GB)
8.6 CM 10, 15, 25, stainless steel
Pos.
1*CICICICICI
2G AIAIAIAI
3G G AIAIAI
4F F F A I A I
5 FAI
6 G
7 F
* Pos. 1 is next to the motor.
Pos.
1*CICICI
2AIAIAI
3AIAIAI
4AIAIAI
5AIAIAI
6BIAIAI
7F B I A I
8GBI
9FF
* Pos 1 is next to the motor.
CM 10, 15, 25, stainless steel
12345
Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller Chamber Impeller
CM 10, 15, 25, stainless s teel
678
Chamber Impeller Chamber Impeller Chamber Impeller
Subject to alterations.
22
Argentina
Bombas GRUNDFOS de Argentina S.A.
Ruta Panamericana km. 37.500 Lote 34A
1619 - Garin
Pcia. de Buenos Aires
Phone: +54-3327 414 444
Telefax: +54-3327 411 111
Australia
GRUNDFOS Pumps Pty. Ltd.
P.O. Box 2040
Regency Park
South Australia 5942
Phone: +61-8-8461-4611
Telefax: +61-8-8340 0155
Austria
GRUNDFOS Pumpen Vertrieb Ges.m.b.H.
Grundfosstraße 2
A-5082 Grödig/Salzburg
Tel.: +43-6246-883-0
Telefax: +43-6246-883-30
Belgium
N.V. GRUNDFOS Bellux S.A.
Boomsesteenweg 81-83
B-2630 Aartselaar
Tél.: +32-3-870 7300
Télécopie: +32-3-870 7301
Belorussia
Представительство ГРУНДФОС в
Минске
220123, Минск,
ул. В. Хоружей, 22, оф. 1105
Тел.: +(37517) 233 97 65,
Факс: +(37517) 233 97 69
E-mail: grundfos_minsk@mail.ru
Bosnia/Herzegovina
GRUNDFOS Sarajevo
Trg Heroja 16,
BiH-71000 Sarajevo
Phone: +387 33 713 290
Telefax: +387 33 659 079
e-mail: grundfos@bih.net.ba
Brazil
BOMBAS GRUNDFOS DO BRASIL
Av. Humberto de Alencar Castelo Branco,
630
CEP 09850 - 300
São Bernardo do Campo - SP
Phone: +55-11 4393 5533
Telefax: +55-11 4343 5015
Bulgaria
Grundfos Bulgaria EOOD
Slatina District
Iztochna Tangenta street no. 100
BG - 1592 Sofia
Tel. +359 2 49 22 200
Fax. +359 2 49 22 201
email: bulgaria@grundfos.bg
Canada
GRUNDFOS Canada Inc.
2941 Brighton Road
Oakville, Ontario
L6H 6C9
Phone: +1-905 829 9533
Telefax: +1-905 829 9512
China
GRUNDFOS Pumps (Shanghai) Co. Ltd.
50/F Maxdo Center No. 8 XingYi Rd.
Hongqiao development Zone
Shanghai 200336
PRC
Phone: +86 21 612 252 22
Telefax: +86 21 612 253 33
Croatia
GRUNDFOS CROATIA d.o.o.
Cebini 37, Buzin
HR-10010 Zagreb
Phone: +385 1 6595 400
Telefax: +385 1 6595 499
www.grundfos.hr
Czech Republic
GRUNDFOS s.r.o.
Čajkovského 21
779 00 Olomouc
Phone: +420-585-716 111
Telefax: +420-585-716 299
Denmark
GRUNDFOS DK A/S
Martin Bachs Vej 3
DK-8850 Bjerringbro
Tlf.: +45-87 50 50 50
Telefax: +45-87 50 51 51
E-mail: info_GDK@grundfos.com
www.grundfos.com/DK
Estonia
GRUNDFOS Pumps Eesti OÜ
Peterburi tee 92G
11415 Tallinn
Tel: + 372 606 1690
Fax: + 372 606 1691
Finland
OY GRUNDFOS Pumput AB
Mestarintie 11
FIN-01730 Vantaa
Phone: +358-3066 5650
Telefax: +358-3066 56550
France
Pompes GRUNDFOS Distribution S.A.
Parc d’Activités de Chesnes
57, rue de Malacombe
F-38290 St. Quentin Fallavier (Lyon)
Tél.: +33-4 74 82 15 15
Télécopie: +33-4 74 94 10 51
Germany
GRUNDFOS GMBH
Schlüterstr. 33
40699 Erkrath
Tel.: +49-(0) 211 929 69-0
Telefax: +49-(0) 211 929 69-3799
e-mail: infoservice@grundfos.de
Service in Deutschland:
e-mail: kundendienst@grundfos.de
Greece
GRUNDFOS Hellas A.E.B.E.
20th km. Athinon-Markopoulou Av.
P.O. B o x 7 1
GR-19002 Peania
Phone: +0030-210-66 83 400
Telefax: +0030-210-66 46 273
Hong Kong
GRUNDFOS Pumps (Hong Kong) Ltd.
Unit 1, Ground floor
Siu Wai Industrial Centre
29-33 Wing Hong Street &
68 King Lam Street, Cheung Sha Wan
Kowloon
Phone: +852-27861706 / 27861741
Telefax: +852-27858664
Hungary
GRUNDFOS Hungária Kft.
Park u. 8
H-2045 Törökbálint,
Phone: +36-23 511 110
Telefax: +36-23 511 111
India
GRUNDFOS Pumps India Private Limited
118 Old Mahabalipuram Road
Thoraipakkam
Chennai 600 096
Phone: +91-44 2496 6800
Indonesia
PT GRUNDFOS Pompa
Jl. Rawa Sumur III, Blok III / CC-1
Kawasan Industri, Pulogadung
Jakarta 13930
Phone: +62-21-460 6909
Telefax: +62-21-460 6910 / 460 6901
Ireland
GRUNDFOS (Ireland) Ltd.
Unit A, Merrywell Business Park
Ballymount Road Lower
Dublin 12
Phone: +353-1-4089 800
Telefax: +353-1-4089 830
Italy
GRUNDFOS Pompe Italia S.r.l.
Via Gran Sasso 4
I-20060 Truccazzano (Milano)
Tel.: +39-02-95838112
Telefax: +39-02-95309290 / 95838461
Japan
GRUNDFOS Pumps K.K.
Gotanda Metalion Bldg., 5F,
5-21-15, Higashi-gotanda
Shiagawa-ku, Tokyo
141-0022 Japan
Phone: +81 35 448 1391
Telefax: +81 35 448 9619
Korea
GRUNDFOS Pumps Korea Ltd.
6th Floor, Aju Building 679-5
Yeoksam-dong, Kangnam-ku, 135-916
Seoul, Korea
Phone: +82-2-5317 600
Telefax: +82-2-5633 725
Latvia
SIA GRUNDFOS Pumps Latvia
Deglava biznesa centrs
Augusta Deglava ielā 60, LV-1035, Rīga,
Tālr.: + 371 714 9640, 7 149 641
Fakss: + 371 914 9646
Lithuania
GRUNDFOS Pumps UAB
Smolensko g. 6
LT-03201 Vilnius
Tel: + 370 52 395 430
Fax: + 370 52 395 431
Malaysia
GRUNDFOS Pumps Sdn. Bhd.
7 Jalan Peguam U1/25
Glenmarie Industrial Park
40150 Shah Alam
Selangor
Phone: +60-3-5569 2922
Telefax: +60-3-5569 2866
México
Bombas GRUNDFOS de México S.A. de
C.V.
Boulevard TLC No. 15
Parque Industrial Stiva Aeropuerto
Apodaca, N.L. 66600
Phone: +52-81-8144 4000
Telefax: +52-81-8144 4010
Netherlands
GRUNDFOS Netherlands
Velu we zo om 35
1326 AE Almere
Postbus 22015
1302 CA ALMERE
Tel.: +31-88-478 6336
Telefax: +31-88-478 6332
E-mail: info_gnl@grundfos.com
New Zealand
GRUNDFOS Pumps NZ Ltd.
17 Beatrice Tinsley Crescent
North Harbour Industrial Estate
Albany, Auckland
Phone: +64-9-415 3240
Telefax: +64-9-415 3250
Norway
GRUNDFOS Pumper A/S
Strømsveien 344
Postboks 235, Leirdal
N-1011 Oslo
Tlf.: +47-22 90 47 00
Telefax: +47-22 32 21 50
Poland
GRUNDFOS Pompy Sp. z o.o.
ul. Klonowa 23
Baranowo k. Poznania
PL-62-081 Przeźmierowo
Tel: (+48-61) 650 13 00
Fax: (+48-61) 650 13 50
Portugal
Bombas GRUNDFOS Portugal, S.A.
Rua Calvet de Magalhães, 241
Apartado 1079
P-2770-153 Paço de Arcos
Tel.: +351-21-440 76 00
Telefax: +351-21-440 76 90
România
GRUNDFOS Pompe România SRL
Bd. Biruintei, nr 103
Pantelimon county Ilfov
Phone: +40 21 200 4100
Telefax: +40 21 200 4101
E-mail: romania@grundfos.ro
Russia
ООО Грундф ос
Россия, 109544 Москва, ул. Школьная
39
Тел. (+7) 495 737 30 00, 564 88 00
Факс (+7) 495 737 75 36, 564 88 11
E-mail grundfos.moscow@grundfos.com
Serbia
GRUNDFOS Predstavništvo Beograd
Dr. Milutina Ivkovića 2a/29
YU-11000 Beograd
Phone: +381 11 26 47 877 / 11 26 47 496
Telefax: +381 11 26 48 340
Singapore
GRUNDFOS (Singapore) Pte. Ltd.
24 Tuas West Road
Jurong Town
Singapore 638381
Phone: +65-6865 1222
Telefax: +65-6861 8402
Slovenia
GRUNDFOS d.o.o.
Šlandrova 8b, SI-1231 Ljubljana-Črnuče
Phone: +386 1 568 0610
Telefax: +386 1 568 0619
E-mail: slovenia@grundfos.si
South Africa
GRUNDFOS (PTY) LTD
Corner Mountjoy and George Allen Roads
Wilbart Ext. 2
Bedfordview 2008
Phone: (+27) 11 579 4800
Fax: (+27) 11 455 6066
E-mail: lsmart@grundfos.com
Spain
Bombas GRUNDFOS España S.A.
Camino de la Fuentecilla, s/n
E-28110 Algete (Madrid)
Tel.: +34-91-848 8800
Telefax: +34-91-628 0465
Sweden
GRUNDFOS AB
Box 333 (Lunnagårdsgatan 6)
431 24 Mölndal
Tel.: +46 31 332 23 000
Telefax: +46 31 331 94 60
Switzerland
GRUNDFOS Pumpen AG
Bruggacherstrasse 10
CH-8117 Fällanden/ZH
Tel.: +41-1-806 8111
Telefax: +41-1-806 8115
Taiwan
GRUNDFOS Pumps (Taiwan) Ltd.
7 Floor, 219 Min-Chuan Road
Taichung, Taiwan, R.O.C.
Phone: +886-4-2305 0868
Telefax: +886-4-2305 0878
Thailand
GRUNDFOS (Thailand) Ltd.
92 Chaloem Phrakiat Rama 9 Road,
Dokmai, Pravej, Bangkok 10250
Phone: +66-2-725 8999
Telefax: +66-2-725 8998
Turkey
GRUNDFOS POMPA San. ve Tic. Ltd. Sti.
Gebze Organize Sanayi Bölgesi
Ihsan dede Caddesi,
2. yol 200. Sokak No. 204
41490 Gebze/ Kocaeli
Phone: +90 - 262-679 7979
Telefax: +90 - 262-679 7905
E-mail: satis@grundfos.com
Ukraine
ТОВ ГРУНДФОС УКРАЇНА
01010 Київ, Вул. Московська 8б,
Тел.:(+38 044) 390 40 50
Фах.: (+38 044) 390 40 59
E-mail: ukraine@grundfos.com
United Arab Emirates
GRUNDFOS Gulf Distribution
P.O. Box 16768
Jebel Ali Free Zone
Dubai
Phone: +971 4 8815 166
Telefax: +971 4 8815 136
United Kingdom
GRUNDFOS Pumps Ltd.
Grovebury Road
Leighton Buzzard/Beds. LU7 8TL
Phone: +44-1525-850000
Telefax: +44-1525-850011
U.S.A.
GRUNDFOS Pumps Corporation
17100 West 118th Terrace
Olathe, Kansas 66061
Phone: +1-913-227-3400
Telefax: +1-913-227-3500
Usbekistan
Представительство ГРУНДФОС в
Ташкенте
700000 Ташк ент ул.Ус ма на Носира 1-й
тупик 5
Телефон : (3712) 55-68-15
Факс: (3712) 53-36-35
Revised 14.09.2011
Grundfos companies
Being responsible is our foundation
Thinking ahead makes it possible
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www.grundfos.com
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owned by Grundfos Management A/S or Grundfos A/S, Denmark. All rights reserved worldwide.
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