Engine Maintenance 9-35
Compressor Drive Belt Replacement and Adjustment (Model 50)
Removal:
1. Loosen the six (three on each end) mounting bolts on the electric motor.
2. Insert a pry bar into the access hole in the unit frame and pry the electric motor upward to remove the tension from the
compressor drive belts.
3. Remove the compressor drive belts from the pulley on the electric motor shaft, and remove the pry bar.
4. Support the compressor and unbolt the compressor from the bell housing (leave the refrigeration lines connected).
5. Slide the compressor assembly away from the flywheel housing.
6. Remove the belts through the gap between the clutch and the flywheel.
Installation:
1. Install the belts on the clutch pulley through the gap between the clutch and the flywheel.
2. Place the compressor in position and install the mounting bolts.
3. Insert a pry bar into the access hole in the unit frame and pry the electric motor upward.
4. Place the compressor drive belts on the pulley on the electric motor shaft.
Compressor Drive Belt Adjustment:
The compressor drive belts should read 80 on the belt gauge.
1. Loosen the six (three each end) mounting bolts on the electric motor.
2. Pry the electric motor down to apply tension to compressor drive belts. Tighten two of the mounting bolts (one on each end).
Check the belt tension with the belt gauge.
3. When the belt tension is correct, tighten the remaining mounting bolts on the electric motor.
4. Adjusting the compressor drive belts may change the tension of the lower fan belt. Check the lower fan belt tension and adjust
it if necessary.
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