Engine Maintenance
100
Belts
Engine/Compressor/Jackshaft /Belt
Tension/Adjustments
1. Place the engine/compressor belt in the idler
pulley. Make sure the belt is also placed in the
engine pulley and the compressor pulley.
2. Turn the sprocket with a 7/8 in. wrench to
tension the belt. Tighten the pulley bolt with a
3/4 in. wrench when the belt is at the proper
tension. Use one
of following methods to
check (or set) the belt tension.
a. The belt tension should be set at a reading
of 70 ± 3 on the Thermo King Belt
Tension Gauge.
b. The belt should deflect 1/2 in. (13 mm) at
the center of the longest (lower) span.
CAUTION: The unit may start
automatically and at any time when the
unit On/Off switch is in the On position.
Units with the CYCLE-SENTRY option
start automatically in both
CYCLE-SENTRY mode and Continuous
mode. Be sure to turn the On/Off switch
Off before opening doors or inspecting or
working on any part of the unit.
1. Sprocket 5. Flat Washers
2. Idler Bracket 6. Belleville Washer
3. Fender Washer 7. Screw
4. Idler Pulley Assembly
Figure 52: Engine—Compressor Belt Adjustment
1
2
3
4
5
6
7
ARD043
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