Thermo King KD-II SR, Manual

Page: 93 / 182

Engine Maintenance (Rev. 04/03)
79
AUTO START/STOP
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 Contin-
uous mode. Be sure to turn the On-Off switch OFF before
opening doors or inspecting or working on any part of the
unit.
NOTE: Tension specifications are measured using gauge
TK 204-427.
Engine/Compressor Belt (Using Belt Tension
Adjustor)
Install and adjust the new engine/compressor belt and the
new compressor/electric motor/jackshaft.
Tighten the belt tension adjuster by hand until it is all the
way down and locked into the belt tension stop.
Tighten pulley bolt.
Belts should be tensioned cold and retensioned cold after 10
hours of unit running.
Gauge tension on new belts should be 75 ± 3. Gauge tension
on used belts should be 70 ± 3.
This tension allows 1/2 in. (13 mm) deflection in the center
of the span.
NOTE: DO NOT overtighten the compressor drive belt.
Belt tension should allow belt to be deflected 1/2 in.
(13 mm) at center of span without any engine move-
ment. Over-tensioned belts cause severe overload on the
bearings. Use only approved Thermo King Service Parts
replacement belts. They are specially designed for the
Thermo King units.
Compressor/Electric Motor/Jackshaft Belt
Slide the jackshaft or induction alternator away from the
compressor to tighten this belt.
Belts should be tensioned cold and retensioned cold after 10
hours of unit running.
Gauge tension on new belts should be 72 ± 3. Gauge tension
on used belts should be 67 ± 3.
This tension allows 1/2 in. (13 mm) deflection in the center
of the span.
Water Pump Belt
Adjust tension by adding or removing shims between pulley
sheaves, until the belt allows 1/2 in. (13 mm) of deflection
at the center of the span.