Servicing Poly V-Belt; Engine Air Cleaner; Figure 4-3 Air Cleaner, Dry Element - Carrier TRANSICOLD 69UG15 Series Operation And Service

4.4.11 Servicing Poly V-belt

WARNING
Beware of moving poly V-belt and belt driv-
en components.
WARNING
Beware of pinch points.
NOTE
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:
a. 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 to-
wards radiator. Be careful not to damage grooves on
the pulley.
b. Replace the poly V-Belt by positioning the belt on the
water pump pulley, and while rotating the engine (as
in step a.), use a flat, blunt object to guide the belt
onto the crank pulley. Be careful not to damage
grooves on the pulley or belt.

4.4.12 Engine Air Cleaner

The dry element engine air cleaner uses a dry element
filter (see Figure 4-3) to filter the engine intake air. The
oil bath air cleaner option uses an oil cup instead of the
dry element filter (see Figure 4-4).
The engine air cleaner should be inspected regularly for
leaks, (see Figure 1-1). A damaged air cleaner or hose
can seriously affect the performance and life of the
engine. The air cleaner is designed to effectively
remove contaminants 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 re-
placed.
a. Air Filter Indicator
The air filter indicator, used with the dry element filter, is
mounted on the unit frame and connected to the engine
air intake. Its function is to indicate when the air cleaner
dry element needs to be replaced. In operation: When a
plugged air cleaner decreases intake manifold pressure
to 500 mm (20") WG, the indicator moves to the red line.
The air cleaner element should be replaced and the
indicator reset by pressing the reset button.
b. Air Cleaner, Dry Element Service
1. Stop the engine and open the cap clamps (see
Figure 4-3) to remove air cleaner bottom cap.
2. Remove the air filter element from the air cleaner
body.
3. Install the new element, secure the bottom cap with
the cap clamps.
1
2
3
4
1. Air Outlet
2. Air Cleaner Body
3. Air Inlet

Figure 4-3 Air Cleaner, Dry Element

c. Air Cleaner, Oil Bath Service
The oil cup should be inspected during pretrip, before
each trip. Never allow more than 1/2 inch (12.7 mm) of
dirt deposit in the cup. More than 1/2 inch accumulation
could result in oil and dirt carrying over into the engine,
causing accelerated
contaminated oil will not allow the air cleaner to function
properly.
Always cover the engine inlet tube while the
air cleaner is being serviced.
1. Stop the engine and remove the oil cup from the air
cleaner. Dispose of the oil in an environmentally safe
manner.
2. Remove the inner oil cup from the oil cup and clean
both cups.
3. Reassemble and fill both oil cups to the indicated lev-
el with oil specified in paragraph 1.10.f.
4−3
5
4. Cap Clamp
5. Air Filter Indicator
engine wear. Heavily
CAUTION
1
T-343