GILLIG LOW FLOOR, Руководство по обслуживанию

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Heating & Air Conditioning
438
Assembly
1. Clean all parts with a soft cloth. Remove any loose metal particles that have been attracted to the
magnet assembly.
2. Install the connecting housing onto the motor. Install and tighten the four flat head screws.
3. Install the drive magnet assembly on to the rotor shaft. Line up the set screws with the flats on
the shaft and tighten. Replace the plastic plug. Use RTV 732 black sealant.
4. Carefully assemble the motor and connecting housing back on to the pump using the four cap
screws and washers. Care should be taken to not damage the cup magnet assembly when install-
ing on the pump.
5. Connect the power connector from the motor to the bus and energize the pump. Check to verify
the pump is operating properly.
Coolant Pump Motor Bearing Replacement
Disassembly
1. Remove the motor from the pump by removing the four cap screws. (See Figure 10- 3.)
2. Move motor to a proper clean work area.
3. Refer to Figure 10-
4 . Remove the four rear endbell screws. Remove endbell, noting any shims
and their location, if so equipped.
4. Remove shaft / rotor assembly, making sure shims remain seated in the front endbell if so
equipped. Caution should be taken not to damage the encoder magnet on the end of the shaft.
5. Remove the snap ring from the shaft, but not remove any shims or the compression spring. Re-
move bearings by sliding them off, and discard them.
6. Clean the bearing seat with #800 emery cloth to allow for the new bearings to slip on. No lubri-
cation should be needed.
Assembly
1. Install new bearings. Make sure the compression spring and any shims are installed in the same
location they were removed from. NOTE: The snap ring should be installed with the rounded
side facing the bearing.
2. Gently install the shaft / rotor assembly back into the motor, making sure it does not contact the
housing or stator. Care should be taken not to chip or damage the magnets.
3. Check the O-ring on the endbell for damage, and replace as necessary. Install the endbell, check-
ing to make sure the shims (if equipped) are in the same position as when the endbell was re -
moved. Tighten the four screws. Check that the shaft / rotor assembly has spring by pushing on
the shaft end. The shaft should spring back if properly installed.
4. Hook up the motor leads to the proper input voltage and energize. Check that the motor is oper -
ating in the proper rotation and that the current draw is approximately 1 amp after 1 minute of
operation.
5. Reassemble the motor to the pump using the same cap screws. Connect the input connector to
the bus connector. Check to verify the pump is operating properly.