23
INSTALLATION AND MAINTENANCE
CPLS drip-proof 3-phase induction motors
4240 en - 2014.09 / b
LEROY-SOMER
- Screw a threaded rod with the same diameter as the screws
into one of the tapped holes of each bearing retainer to maintain
its angular position when refitting the shield. The lubrication
line indicates the angular position of the bearing retainer.
- Mount the new bearings on the shaft, see section 6.3.2 on
mounting bearings.
- Insert the rotor in the stator (1), taking care not to knock the
winding.
- If the motor has tie rods, pass them into the stator.
- Position the preloading washer with a small amount of grease
at the back of the bearing cage of the DE shield (2). Run all the
connection cables through (stator and any accessories), then
refit the shield, positioning it on the stator (1) with a lifting
system.
- Position the NDE shield (13) on its rods/pins, before pushing
it up against the stator.
- Semi-tighten the shield fixing screws to hold the assembly in
position.
- Check the alignment of each end shield with the housing. (An
angular defect could prevent the rotor rotating freely once
mounted on its base).
- Tighten the shield fixing nuts diagonally to the recommended
torque (see section 6.4). The lifting device can then be
removed.
- Fix the DE (6) and NDE (7) bearing retainer.
- Screw in the DE (8) and NDE (9) valves.
- Tighten the valve grub screws.
- Check that the rotor turns freely by hand and that there is no
axial play.
- Refit the DE (10) and NDE (11) grease traps.
- Fix the terminal box support plate.
- Refit the terminal box (15).
- Fix the terminal plate (16)
- Wire up the terminal plate, complying with the tightening
torques indicated in section 2.5.
- Refit the forced ventilation unit (17).
- Check how much the shaft driving the encoder is out-of-
round: 0.03 mm max. (A defect could quickly damage the
encoder).
- Refit the encoder (14), with its support (12).
- Tighten the encoder driving ring screw.
- Refit the encoder protective cover (13) and the 3 CHC screws.
When tightening its screws, be sure not to force the encoder
feet: it must remain centred on the shaft. Forcing it could cause
high-speed vibrations, with damaging effects on the encoder .
- Replace the shaft extension key.
Summary of Contents for CPLS 112
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