pulley will erode the undercord ribs, causing the
belt to lose its gripping power.
6.
Check the drive belts for cracks. See
, Ref.
F. Small irregular cracks are usually the signs of
an old belt.
7.
Visually inspect the pulleys for excessive play or
wobble. Excessive play or wobble indicates a
failure of the pulley bearing. Check for belt
squealing or squeaking. Replace the bearings as
necessary.
NOTE: If it is difficult to distinguish the location
of a supposed bearing noise, obtain a stetho-
scope and place it on the component being
checked, not the pulley, to isolate the area from
outside interference.
8.
Inspect all pulleys for foreign objects, oil, or
grease in the grooves.
Belt Tension Inspection
Spring-Tension Type
On belts equipped with a spring tensioner, the belt
tension is automatically adjusted. Check that the ten-
sioner is holding tension on the belt by inserting the
end of a breaker bar in the 1/2-inch square hole on
the forward face of the tensioner, and rotating the
tensioner down, away from the belt. When the
breaker bar is slowly released, the tensioner should
return to its original position.
01–03 Engine Oil and Filter
Checking and Changing,
Gasoline Engines
Checking
It is important to check the oil regularly and keep it at
the proper level. In order to get an accurate reading,
f150010a
A
B
C
D
E
F
11/21/94
A. Glazing
B. Separating Layers
C. Streaked Sidewalls
D. Tensile Break
E. Uneven Ribs
F.
Cracks
Fig. 2, Drive Belt Replacement Conditions
Engine
01
Walk-In Van Chassis Maintenance Manual, May 2022
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