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Compressor and Clutch Maintenance
Operation
A stationary field coil is mounted on the compressor body
concentric with the shaft. A pulley assembly, consisting of
a pulley, a disc and a hub is mounted on the shaft of the
compressor. The hub and disc are flexibly connected with
flat springs that in the disengaged position, hold the disc
slightly away from the pulley web (friction surface).
When an electric current flows through the field coil, a mag-
netic field is created. The magnetic field pulls the disk
against the pulley web and compresses the flat springs. This
causes the hub and disk to rotate with the pulley.
Compressor Clutch Assembly
CLUTCH REMOVAL
NOTE: Make sure the proper tools are available before
performing maintenance procedures. Refer to the tool list-
ing at the end of this chapter for tools required. Contact
your local Thermo King dealer for further information.
Removal
1. Remove the center bolt using the puller arbor
(TK 204-804) to prevent drive plate rotation.
Remove Center Bolt
2. Remove the drive plate using the shaft seal kit (TK
204-805). Then remove the shims from either the drive
shaft or the drive plate.
Remove Drive Plate
1. Hub 4. Disk
2. Stationary Field Coil 5. Flat Springs
3. Pulley
1. Holder
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