Grundfos MTR 15 Operating instructions

Service instructions
MTR 10, 15 and 20
50/60 Hz
1/3~
1 / 18
96548180 0804 GB
Contents
1. Type identification .......................................................................................................................2
1.1 Nameplate......................................................................................................................................................2
1.2 Type key ..........................................................................................................................................................3
1.3 Code for shaft seal........................................................................................................................................4
2. Torques and lubricants................................................................................................................. 5
3. Service tools..................................................................................................................................6
3.1 Special tools ...................................................................................................................................................6
3.2 Standard tools ...............................................................................................................................................6
3.3 Torque tools ................................................................................................................................................... 7
4. Dismantling and assembly ..........................................................................................................8
4.1 Transport bracket .........................................................................................................................................9
4.2 Dismantling the pump.............................................................................................................................. 11
4.3 Assembly.......................................................................................................................................................12
4.4 Checking and replacing impellers/wear rings and neck rings........................................................13
5. Order of assembly for chambers and impellers........................................................................14
5.1 Overview of chambers for MTR 10 .........................................................................................................14
5.2 Positioning of chambers in MTR 10-2 up to MTR 10-16.................................................................... 15
5.3 Positioning of chambers in MTR 10-18 up to MTR 10-22..................................................................16
5.4 Overview of chambers for MTR 15 and MTR 20 .................................................................................. 17
5.5 Positioning of chambers in MTR 15 and MTR 20 ................................................................................18
18

# / 18
1. Type identification
1.1 Nameplate
TM02 9053 1704
Fig. 1. Nameplate with 60 Hz data
Pos. Description Pos. Description
1 Type designation 10 Country of production
2 Model 11 Frequency
3 Product number 12 Speed
4 Place of production 13 Rated flow rate
5 Production year and week 14 Maximum pressure and temperature
6P215 The number of the copy of the technical file kept
with KEMA (stated if the pump is ATEX classified)
7 Closed valve head, 50 Hz
8 Head at rated flow rate, 50 Hz 16 The serial number of the pump (stated if the
pump is ATEX classified)
9
Direction of rotation:
CCW: Counter-clockwise
CW: Clockwise 17 ATEX category (stated if the pump is ATEX
classified)
Model A96515006P10420
96505758
f
n
Q
Hz
min
-1
m
3
/h
P 2
H max
H
kW
m
m
pmax/tmax
bar/˚C
60
3500
3,6
25/90
0,55
38
27,1
CCW
000001
Technical file no. XXXXXXXX
Serial No. Made in Taiwan
DK-8850 Bjerringbro
o
II 2 G c 90 C
11
12
13
14
6
7
8
9
10
15
16
17
MTR3-4/4A-W-A-HUUV
12345

# / 18
1.2 Type key
Example MTR 10 -4 / 4 A -W -A -HUUV
Type range
Rated flow rate m³/h
Number of stages
Number of impellers in the pump
Code for pump version
A = Basic version
B = Oversize motor
P = Undersize adapter flange (one flange size smaller)
T = Oversize adapter flange (two flange sizes bigger)
X = Special version
Code for pipe connections
M = Changed flange connection
W = Internally threaded
Code for materials
A = Standard
I = Stainless steel parts of DIN W.-Nr. 1.4301 / AISI 304 or similar class
Code for shaft seal, see 1.3 Code for shaft seal.

# / 18
1.3 Code for shaft seal
The code for shaft seal always consists of four letters.
The following codes are used:
Example H U U V
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
R O-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
H Cemented tungsten carbide, embedded (hybrid)
U Cemented tungsten carbide
Q Silicon carbide
V Aluminium oxide
X Other ceramics
4
EEPDM
FFXM
P NBR (nitrile rubber)
TPFTE
VFKM
K FFKM

# / 18
2. Torques and lubricants
Thread-Eze, part no. SV9997 (0.5 l).
Gardolube L 6034, part no. SV9995 (1 l).
Pos. Designation Quantity Dim. Torque [Nm] Lubricant
7.a Screw 4 M4 3 ± 0.25 -
9 Hexagon socket head screw 4
M6 13 ± 1.5
Thread-EzeM8 31 ± 3
M10 62 ± 6
28 Hexagon head screw 4
M6 ?
Thread-Eze
M8 ?
M12 ?
M16 ?
36 Nut for strap
2M8 18±1
Gardolube
4M10 20 ± 4
M12 50 ± 5
36a Nut 4
M6 5 ± 1
Thread-Eze
M8 12 ± 2
M12 30 ± 3
M16 40 ± 8
105 Shaft seal 1 M33 35 ± 7 Soapy water
113 Set screw 3 M5 2.5 ± 0.25 -
122 Lock nut 1 M8 12 ± 2 Gardolube
M12 40 ± 8

# / 18
3. Service tools
3.1 Special tools
3.2 Standard tools
ABCD
EFGH
IJ
Pos. Designation For pos. Description Part number
A Shaft holder for assembly SV0040
BRing insert tool for shaft seal
+ square adapter 105 SV2101
SV2100
C Puller for neck ring 49, 65 SV0239
Pos. Designation For pos. Description Part number
D Bits kit 9, 113 SV2010
EScrewdriver 105 Straight slot -
7a Torx TX20 -
F Ring/open-end spanner 28, 36, 122
M6 - 10 mm SV0083
M8 - 13 mm SV0055
M12 - 19 mm SV0054
M16 - 24 mm SV0122
GSocket 28,36
M6 - 10 mm SV0806
M8 - 13 mm SV0091
M12 - 19 mm SV0267
M16 - 24 mm SV0092
H Plastic hammer No. 2 SV0349

# / 18
3.3 Torque tools
Pos. Designation For pos. Description Part number
I Torque wrench 9, 26b, 28a, 36,
105, 113
1-6 Nm SV0438
4-20 Nm SV0292
20-100 Nm SV0269
J Ratchet insert tool I 9 x 12, ½" x ½" SV0295

# / 18
4. Dismantling and assembly
Position numbers
Position numbers of parts (digits) refer to exploded views, sectional drawings and parts lists; position
numbers of tools (letters) refer to 3. 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 by new parts.
During assembly
• Lubricate and tighten screws and nuts to the torque stated, see 2. Torques and lubricants.

# / 18
4.1 Transport bracket
To protect the bearings and the shaft seal, a transport bracket must always be used when transporting the
pump without motor.
4.1.1 Fitting the transport bracket
1. Press home the shaft pos. 51.
2. Press home the driver of the shaft seal pos. 105 and tighten the three screws pos. 113.
3. Lift the shaft pos. 51 and fit the adjusting fork.
4. Fit the coupling pos. 8 and the screws pos. 9, but leave loose.
5. Fit the transport bracket.
6. Fit the two screws and nuts pos. 703 and 704, but leave loose.
7. Tighten the screws pos. 9 in the coupling.
8. Tighten the screws pos. 703.
9. Remove the adjusting fork.
10. The pump can now be transported without motor.
Fig. 1 Transport bracket pos. 700
Fig. 2 Transport bracket pos. 701 and 702
Flange size
Fig. 1 Fig. 2 Hexagon head screw
pos. 703
(2 pcs.)
Nut
pos. 704
(2 pcs.)
Transport bracket complete
pos. 700
Shaft stub
pos. 701
Rail
pos. 702
F85 96521627 - - ID8022 M6 x 20 96429513
F100 96521627 - - ID8023 M6 x 25 96429513
F115 96521626 - - ID8024 M8 x 20 ID0825
F130 96521626 - - ID8025 M8 x 25 ID0825
F265 - 96508079 96508073 ID7904 M12 x 30 None
F300 - 96508080 96508073 ID7905 M16 x 45 ID7908
56C - 96508075 96508072 ID1839 UNC 3/8" x 25 96120884
182TC - 96508076 96508074 ID1840 UNC 1/2" x 25 96467385
213TC - 96508077 96508074 ID0185 UNC 1/2" x 1 ½" 96467385
254TC - 96508078 96508074 96491112 UNC 1/2" x 2 ½" 96467385
284TSC - 96508078 96508074 ID1840 UNC 1/2" x 25 96467385
703
700
704
703
702
704
701
M10x20

# / 18
4.1.2 Removing the transport bracket
It is very important to proceed according to these instructions, as the shaft seal may otherwise be damaged.
1. Remove three of the screws pos. 9.
2. Slacken the last screw pos. 9, but do not unscrew it completely.
3. Hit the end of the hexagon key carefully with the flat of the hand to loosen one of the coupling halves.
4. Remove the last screw pos. 9 and the loose coupling half.
5. Hit the flat part of the coupling half on the shaft end very carefully.
6. Remove the coupling half when it is loose.
7. Remove the screws pos. 703 and the nuts pos. 704 and remove the transport bracket.
8. Slacken the screws pos. 113 by ¼ turn.
9. Lift the shaft pos. 51 and fit the adjusting fork.
10. Tighten the screws pos. 113 with 2.5 Nm.
11. Fit the motor to the pump head.
12. Fit the screw pos. 28, lubricate and tighten them diagonally to the torque stated, see 2. Torques and
lubricants.
13. Fit the pin pos. 10 and the two coupling halves pos. 10a.
14. Lubricate the four screws pos. 9 with Thread-Eze and fit them.
15. Check that the gaps either side of the coupling halves are equal.
16. Tighten the screws pos. 9 to the torque stated, see 2. Torques and lubricants, and remove the adjusting
fork.
17. Check that the shaft rotates freely and noiselessly.
18. Place the adjusting fork on the inside of one of the coupling guards.
19. Fit the coupling guards pos. 7 and the screws pos. 7a.
TM02 9558 3204
Fig. 3 Gaps between coupling halves

# / 18
4.2 Dismantling the pump
4.2.1 Removing the motor, coupling and shaft seal
1. Remove the screws pos. 7a together with the coupling guards pos. 7.
2. Remove the screws pos. 9 together with the coupling halves pos. 10a and the shaft pin pos. 10.
3. Remove the screws pos. 28.
4. Lift the motor off the pump head pos. 2.
5. Slacken the three screws of the shaft seal pos. 113 by approx. ¼ of a turn.
6. Slacken the shaft seal pos. 105 using the ring insert tool for shaft seal pos. B until the thread is completely
free of the pump head.
7. Pull the shaft seal off the shaft.
4.2.2 Dismantling the chamber stack
1. Remove motor, coupling and shaft seal, see 4.2.1 Removing the motor, coupling and shaft seal
2. Place the shaft holder pos. A in a vice, but do not tighten the vice.
3. Remove the nuts pos. 36 together with the washers pos. 66a.
4. Remove the straps pos. 26a, the strainer pos. 84 and the inlet parts pos. 44 and 121.
5. Loosen the chamber stack with a light blow and pull it off.
6. Fit the shaft pin pos. 10 into the shaft pin hole, place the chamber stack in the shaft holder pos. A and
tighten the vice.
7. Remove the nut pos. 122, the washer pos. 66 and the splined clamp pos. 64c.
8. Remove the chamber stack parts: impellers, spacing pipes, chambers and bearing rings.
9. Remove the driver pos. 61.
10. If the neck rings pos. 45 in the chambers are worn, remove them by pressing off the retainer for neck rings
using the puller for neck ring pos. C.
11. MTR 15 and 20:
If the wear rings of the impellers pos. 49a are worn, remove them with the puller for neck ring pos. C.
12. Remove the gasket pos. 37.
TM02 9559 3204
Fig. 4 Fitting the chamber stack in the holder

# / 18
4.3 Assembly
4.3.1 Assembling the chamber stack
1. Fit the neck rings into the chambers pos. 45, if removed.
2. MTR 15 and 20:
Fit the wear rings on the impellers pos. 49a, if removed.
3. Place the shaft holder pos. A in a vice, but do not tighten the vice.
4. Fit the shaft pin pos. 10 into the shaft pin hole, place the shaft in the shaft holder and tighten the vice.
5. Check that the lock ring of the shaft pos. 51 is not damaged.
6. Fit the driver pos. 61.
7. Fit the chamber stack parts on the shaft: chamber, spacing pipe, impeller and bearing ring, see 5. Order of
assembly for chambers and impellers.
Note: When fitting the chamber stack, make sure that bearings and other rotating parts are not dropped
on the shaft. They must be slid carefully over the shaft to prevent any damage to bearings.
8. Fit the splined clamp pos. 64c, washer pos. 66 and nut pos. 122 and tighten to the torque stated, see 2.
Torques and lubricants.
9. Fit the gasket pos. 37.
10. Slacken the vice and fit the chamber stack on the pump head pos. 2.
11. Fit the inlet parts pos. 44 and 121, the strainer pos. 84 and the straps pos. 26a.
Note: The holes for the straps are positioned asymmetrically.
12. Fit the washers pos. 66a and the nuts pos. 36 fixing the straps to the pump head.
13. Check that the straps are straight (parallel with the shaft), and tighten the screws alternately to ensure
that the chamber stack is clamped straight.
Tighten to the torque stated, see 2. Torques and lubricants.
4.3.2 Fitting the shaft seal, coupling and motor
1. Assemble the chamber stack, see 4.3.1 Assembling the chamber stack.
2. If necessary, clean and smooth the shaft end using the holder with emery cloth supplied with the shaft
seal kit.
3. Moisten the shaft end with soapy water.
4. Press the shaft seal on the shaft, screw it into the pump head and tighten it with 35 Nm using the ring
insert tool for shaft seal pos. B.
5. Press home the shaft.
6. Press the ring with the three set screws pos. 113 against the hexagon plug.
7. Tighten the screws pos. 113 with 2.5 Nm.
8. Lift the chamber stack by inserting a screwdriver or similar tool in the hole for the pin in the shaft and fit
the adjusting fork fitted to one of the coupling guards.
9. Fit the motor to the pump head.
10. Fit the screws pos. 28, lubricate and tighten them diagonally to the torque stated, see 2. Torques and
lubricants.
11. Fit the pin pos. 10 and the two coupling halves pos. 10a.
12. Lubricate the four screws pos. 9 with Thread-Eze and fit them.
TM02 9560 3204
Fig. 5 Fitting the adjusting fork

# / 18
13. Check that the gaps either side of the coupling halves are equal.
14. Tighten the screws to the torque stated, see 2. Torques and lubricants, and remove the adjusting fork.
15. Check that the shaft rotates freely and noiselessly.
16. Place the adjusting fork on the inside of one of the coupling guards.
17. Fit the coupling guard pos. 7 and the screws pos. 7a.
4.4 Checking and replacing impellers/wear rings and neck rings
Impellers/wear rings
1. Check whether there is a noticeable groove in the impeller skirts (CR 10) or wear rings (CR 15 and 20)
caused by friction (use a finger nail).
2. If there is a groove, the impellers/wear rings must be replaced. The wear rings can be removed by means
of the puller for neck ring pos. C.
Neck rings
The neck rings pos. 65 should always be replaced if the chamber stack has been dismantled.
1. Push the retainer for neck ring free of the chamber using the puller for neck ring pos. C.
2. Remove the neck ring pos. 45.
3. Fit a new neck ring in the chamber.
4. Press the retainer for neck ring down on the neck ring and make it engage with the chamber. It must be
possible to move the neck ring freely (sideways) between the retainer and the chamber.
Bearing rings
1. Check whether there is a visible or noticeable edge on the rotating bearing rings (use a finger nail).
2. The bearing rings pos. 47a and the chambers with bearing ring pos. 4a must be replaced at the same time.
TM02 9558 3204
Fig. 6 Gaps between coupling halves
TM02 1182 0601
Fig. 7 Correct fitting of neck ring

# / 18
5. Order of assembly for chambers and impellers
5.1 Overview of chambers for MTR 10
TM02 8966 1204
49
3
69a 64d
47a
49
64a
4a
64
49
4
69
69a
3a
64
64e
47a
3
49
61 6
69
121
84
122
66
64c
66b
44
3a
4a

# / 18
5.2 Positioning of chambers in MTR 10-2 up to MTR 10-16
TM02 9564 3204
MTR 10-
148 178 208 238 268 298
213214321543216543217654321
2/ 3/ 4/ 5/ 6/ 7/
2
3
1
4
5
6
7
8
L
34
388
1098765
10/ 2 1 12 12/ 567891011
448
4 312
L
8
7
6
5
4
1
3
2
9
10
11
12
13
MTR 10-
9/ 1234567
358
89
8/
328
87654321
9
34
508
111098765
14/ 2 1 12 16/ 567891011
568
4 31213
L
8
7
6
5
4
1
3
2
9
10
11
12
13
14
MTR 10
141516121314
15
16
17

# / 18
5.3 Positioning of chambers in MTR 10-18 up to MTR 10-22
TM02 9565 3204
19
18
MTR 10-18/
18
17
16
15
14
13
2
3
1
4
9
10
11
12
L
17 16 34
622
15 14 13 12 11 10 9 2 15678
5
6
7
8
22
21
20
19
22 21 20 19 18
MTR 10-22/
18
17
16
15
14
13
2
3
1
4
9
10
11
12
L
17 16 34
748
15 14 13 12 11 10 9 2 1
23
5678
5
6
7
8
21
20
19
20 19 18
MTR 10-20/
18
17
16
15
14
13
2
3
1
4
9
10
11
12
L
17 16 34
688
15 14 13 12 11 10 9 2 15678
5
6
7
8

# / 18
5.4 Overview of chambers for MTR 15 and MTR 20
TM02 9561 3204
49
3
69a 64d
47a
49
64a
4a
64
49
4
69
69a
3a
64
64e
47a
3
49
61 6
69
121
84
122
66
64c
64b
44
3a
4a
64e

# / 18
5.5 Positioning of chambers in MTR 15 and MTR 20
TM02 8967 3204
MTR 15/20-
178 223 268 313 358 403
213214321543216543217654321
2/ 3/ 4/ 5/ 6/ 7/
2
3
1
4
5
6
7
8
L
34
538
1098765
10/ 2 1 12 12/ 567891011
628
4 312
L
8
7
6
5
4
1
3
2
9
10
11
12
13
MTR 15/20-
9/ 1234567
493
89
8/
448
87654321
9
18
17
16
15
14
13
12
11
10
9
2
3
1
4
5
6
7
8
L
1234567891011121314151617
MTR 15/20 -17/
853
34
718
111098765
14/ 2 1 12 16/ 567891011
808
4 31213
L
8
7
6
5
4
1
3
2
9
10
11
12
13
14
MTR 15/20-
141516121314
15
16
17