Table 1-1. Unit Preventive Maintenance Checks and Services CONT.
Item to be
Not Fully Mission
It's time to replace vee belts when they are...
cracked or split.
Check for cracks or splits on bottom
Grease buildup causes belts to
or sides of belt. A cracked or split
soften, rot, and fail.
belt can fail at any time.
Belts with slick, hard sides do not
When the underside of the belts peel, it
function properly. This can cause the
becomes uneven, causing rough
radiator or other components to
operation and failure.
Check vee belts for excessive wear and belt tightness.
Replace or adjust accordingly
vee belt is loose,
glazed, cracked to
the belt fiber, has
more than one crack
(1/8 inch in depth or
50% of belt
thickness), or has
frays more than 2
a. Inspect blade cutting edge for loose or missing
Cutting edge has
loose or missing
b. Inspect cutting edge for damage such as cracks or
c. Inspect that cutting edges are not worn beyond 1/8
Edge is worn beyond
in. from blade.
1/8 in. from blade.