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Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f
LS/LSES MOTORS
10 - LS/LSES MOTORS
10.1 - LS/LSES 71 to 160 MP/LR motors
10.1.1 - Dismantling
- Remove the screws (27) and then take off the cover (13).
- Pull out the fan (7) using a hub remover or 2 levers (for
example, 2 screwdrivers) diametrically opposed to one
another, using the shield (6) for support.
- Remove the tie rods (14).
- Remove the key (21).
- Using a wooden mallet, tap the shaft on the fan side in order
to loosen the drive end shield (5).
- Remove the rotor shaft (3) and the DE shield (5) taking care
not to knock the winding.
- Remove the shield on the fan side (6).
- Take out the preloading washer (59) and the seal of the NDE
shield (54) for LS/LSES 100, 112 and 132 motors.
- Remove the circlip (60) from flanged motors using angled
circlip pliers.
- Separate the DE shield from the rotor shaft.
- The shaft can then be seen with its 2 bearings and, if
appropriate, the circlip.
Use a bearing remover to take out the bearings, taking care not
to knock the running surfaces of the shaft.
10.1.2 - Reassembling motors without circlip
- Mount the bearings on the rotor shaft.
- Insert the rotor into the stator taking all possible precautions
not to knock the winding.
- Mount the DE shield (5).
- For LS/LSES 71 motors, mount the seal (39) with grease
beforehand.
- Place the preloading washer (59) in the bearing housing, then
mount the NDE shield (6).
- Place the tie rods (14) in position and tighten the nuts
diagonally up to the recommended torque (see section 6.4).
- Mount the shield seals (39, 54, 308) with grease.
- Mount the fan (7) using a drift to bed it into position.
- Check that the motor turns freely by hand and that there is no
radial play.
- Replace the cover (13) and fix it with the screws (27).
10.1.3 -
Reassembling motors with flange and
circlip
- Mount the DE bearing (30) in the flange (5) using the outer
slip-ring for support.
- Fit the circlip (60).
- Mount this assembly on the rotor (3) using the inner slip-ring
for support.
- Mount the NDE bearing on the rotor.
- Insert the rotor (3) and shield (5) assembly in the stator taking
care not to knock the winding.
- Place the preloading washer (59) in the bearing housing, then
mount the NDE shield (6).
- Place the tie rods (14) in position and tighten the nuts
diagonally up to the recommended torque (see section 6.4).
- Mount the shield seals (39, 54, 308) with grease.
- Mount the fan (7) using a drift to bed it into position.
- Check that the motor turns freely by hand and that there is no
axial play.
- Replace the cover (13) and fix it with the screws (27).
- Replace the key (21).
6
5
39
7
59
50
30
6
5
39
30
7
59
60
50
59
5
6
308
7
50
30
6
5
39
50
30
7
59
60
6
5
308
54
59
50
30
6
5
39
50
30
54
59
60
6
5
308
54
59
50
30
6
5
39
50
30
54
59
60
LS/LSES 71
foot mounted
LS/LSES 71
flange mounted (or foot/flange)
LS/LSES 80 - 90
foot mounted
LS/LSES 80 - 90
flange mounted (or foot/flange)
LS/LSES 100 - 112 - 132
foot mounted
LS/LSES 100 - 112 - 132
flange mounted (or foot/flange)
LS/LSES 160 MP/LR
foot mounted
LS/LSES 160 MP/LR
flange mounted (or foot/flange)
NDE
DE
NDE
DE
NDE
DE
NDE
DE
NDE
DE
NDE
DE
NDE
DE
NDE
DE
