Thermo King UT-1200, Manual

Page: 113 / 169

Engine Maintenance
113
Belts
Belts should be regularly inspected during unit
pre-trip inspections for wear, scuffing or cracking,
and belt tension. Belts that are too loose will
whip, and belts that are too tight put too much
strain on the belt fibers and bearings.
NOTE: NOTE: Do not attempt to remove or
install belts without loosening adjustments. Belts
that are installed by prying will fail prematurely
due to internal cord damage.
Engine/Electric Motor Belt
1. Loosen the idler mounting nut and the jam nut
on the idler adjuster.
2. Turn the idler adjuster to obtain a tension of
75 ± 5 on the TK Gauge P/N 204-427 or a
deflection of 13 mm at the center of the belt.
3. Tighten the idler mounting nut and the jam nut
on the idler adjuster.
Compressor/Electric Motor Belt
1. Loosen the idler mounting nut.
2. Turn the idler adjuster to obtain a tension of
75 ± 5 on the TK gauge P/N 204-427 or a
deflection of 13 mm at the center of the belt.
3. Tighten the idler mounting nut.
CAUTION: Do not attempt to adjust belts
with the unit running.
1. Idler Mounting Nut
2. Jam Nut
3. Idler Adjuster
Figure 188: Engine Clutch—Electric Motor Belt
Adjustment
ARA020
1
2
3
1. Idler Mounting Nut
2. Idler Adjuster
Figure 189: Electric Motor—Compressor Belt
Adjustment
ARA021
1
2