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Installation and maintenance - Three-phase induction motors
4850 en - 2018.11 / f
FLS/FLSES MOTORS
11.3 - FLS/FLSES 180 M/L/LUR, 200 LU,
225 MR/SR motors
11.3.1 - Dismantling
- Remove the screws (27) and then take off the cover (13).
- Pull out the fan (7) using a hub remover or 2 levers diametrically
opposed to one another, using the shield (6) for support.
- Take out the key (21) and remove the seals (39 and 54 for foot
mounted motors) (54 for flange mounted motors)
.
- Remove the mounting screws (270 + 273).
- Unscrew the inner bearing retainer (33) fixing screws (40)
when using a flange mounted motor or if the drive end bearing
is locked.
- Using a bronze drift, remove the shields (5 and 6) by tapping
gently on the shield bosses. Recover the preloading washer
(59).
- Remove the circlip (38) if necessary (flange mounted motor).
- Remove the rotor (3) from the stator (1) taking care not to
touch the winding.
- Take out the bearings (30) and (50) using a bearing remover,
while protecting the end of the shaft extension with a washer.
Avoid knocking the running surfaces of the shaft.
11.3.2 - Reassembly
- See section 6.1 before reassembly.
- If necessary, insert the inner bearing retainer (33) at the rotor
drive end, then mount new bearings on the shaft, see section
6.3 mounting bearings.
- Mount the circlip (38) for flange mounted motors.
- Insert the rotor (3) in the stator (1) taking care not to knock the
winding.
- Position the preloading washer (59) with a small amount of
grease in the back of the bearing cage of the NDE shield (6),
then remount the NDE shield (6), positioning it on the stator.
- If there is a bearing retainer (33), screw a rod with the same
thread diameter as the screws (40) into one of the tapped holes
of the bearing retainer to maintain its angular position when
remounting the DE shield (5).
- Remount the shield (5) taking care to allow for the positioning
of a bearing retainer if used.
- Place
the mounting screws (14) in position and tighten the
nuts diagonally up to the recommended torque (see section
6.1).
- If necessary, fix the bearing retainer (33) with its own screws.
- Mount the shield seals with grease: (54 at the non drive end)
(39 at the drive end for foot mounted motors).
- Mount the fan (7) using a drift to bed it into position.
- Check that the rotor turns freely by hand (that there is no axial
play if there is a locked end shield).
- Replace the cover (13) and fix it with the screws (27).
- Replace the key (21).
54
54 62 6
60 50 53 33 5 30 38 40 39
542
6 59 50
33 5 30 38 40 39
FLS/FLSES 180 M/L/LUR - 200 LU
225 MR/SR
standard bearings
NDE
DE
FLS/FLSES 180 M/L/LUR - 200 LU
225 MR/SR
drive end roller bearings
NDE
DE
