Engine/Electric Motor (Jackshaft) Belt - Thermo King T-1000R Series Maintenance Manual

Engine/Electric Motor (Jackshaft)
Belt
The engine/electric motor (jackshaft) belt is a 3V
belt that also drives the engine side evaporator
fan. A static belt tensioner keeps the belt at the
proper tension. Use the following procedure to
replace this belt or adjust the belt tension.
1. If replacing the belt, remove the electric motor
(jackshaft)/compressor belt.
1
4
1. Adjusting Bolt
2. Pulley Mounting Nut
3. Pulley
4. Adjusting Bracket
Figure 190: Belt Tensioner Components
2. Loosen the locknut on the restraining mount
(snubber) until the chain is loose.
3. Loosen the pulley mounting nut enough to
allow the adjusting bracket to slide, but not
enough to allow the pulley to tilt.
4. Turn the adjusting bolt clockwise until the belt
is loose. If not replacing the belt go to step 7.
5. Remove the old belt and note how it fits on the
pulleys.
6. Install the new belt. Make sure it fits on the
pulleys correctly.
7. Take a straight edge, place it against the side
of the muffler can and mark the frame as
shown below. This is the unloaded engine
position.
2
8. Turn the adjusting bolt counter-clockwise to
make the pulley descend and tighten the belt
until it is at approximately 10 Hz lower than
3
the correct belt tension setting using the
frequency gauge P/N 204-1903 on the top
span. This will pull the engine towards the
belt. See "Specifications" for the correct belt
tension settings.
NOTE: When using the frequency gauge
P/N 204-1903, place the probe near the belt
with the LED shining on the belt. Pluck the
belt with a metal tab as shown below to get an
accurate reading. Take three readings and
average them.
Figure 192: Using Frequency Gauge P/N 204-1903
Engine Maintenance
Figure 191: Mark Frame
1
1. Probe
2. Metal Tab
2
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