United Technologies Carrier Transicold 69UG15, Operation And Service

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T-360 5–4
5.4.9 Engine Speed
The engine speed is electronically controlled. DO NOT ATTEMPT TO ADJUST ENGINE SPEED .
5.4.10 Replacing the Engine Speed Sensor
1. Disconnect the plug to the sensor, (see Figure 2.2 ).
2. Remove the bolt securing the sensor to the housing.
3. Remove the sensor from the housing.
4. Clean the recess in the housing to ensure that the sensor seats properly when re-installed.
5. Re-install the sensor, replace the securing bolt and connect the plug to the sensor.
5.4.11 Servicing Poly V-belt
WARNING
!
Beware of moving poly V-belt and belt driven components.
WARNING
!
Beware of pinch points.
NOTICE
A frayed, cracked or worn poly V-belt must be replaced. After installing a new belt, check the
adjustment after running the unit for three or four hours. This will allow for the initial stretch,
which is common on new belts. Once this initial stretch has taken place, the belt should be
checked at regular intervals.
The poly V-belt is driven by a sheave on the engine crankshaft. Its two functions are: (1) to drive the radiator fan
and (2) to drive the water pump.
To replace the poly V-belt, perform the following steps:
1. Using the proper size socket, slowly rotate the crank on the crank pulley nut. At the same time, use a flat,
blunt object to guide the belt off the crank pulley towards radiator. Be careful not to damage grooves on the
pulley.
2. Replace the poly V-Belt by positioning the belt on the water pump pulley, and while rotating the engine (as in
step 1.), use a flat, blunt object to guide the belt onto the crank pulley. Be careful not to damage grooves on
the pulley or belt.
5.4.12 Engine Air Cleaner
The dry element engine air cleaner uses a dry element filter (see Figure 5.3 ) to filter the engine intake air. The oil
bath air cleaner option uses an oil cup instead of the dry element filter (see Figure 5.4 ).
The engine air cleaner should be inspected regularly for leaks, (see Figure 2.2 ). A damaged air cleaner or hose
can seriously affect the performance and life of the engine. The air cleaner is designed to effectively remove con-
taminants from the air stream entering the engine. An excessive accumulation of contaminants in the air cleaner
will impair its operation. Therefore, a service schedule must be set up and followed.
1. Check all connections for mechanical tightness. Be sure the air cleaner outlet pipe is not fractured.
2. In case of leakage, if adjustment does not correct the problem, replace necessary parts or gaskets. Swollen
or distorted gaskets must always be replaced.