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

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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

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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.

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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

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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

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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

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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

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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.

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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

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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