TM 55-1680-320-23&P
2-16 Change 8
Table 2-1. ORGANIZATIONAL PREVENTIVE MAINTENANCE CHECKS AND SERVICES (cont)
ITEM
NO.
INTERVAL
D
W
M
A
ITEM TO BE
INSPECTED
PROCEDURES
7
*
Hook Assembly
Visually inspect for nicks, cuts, dents
or corrosion. Inspect keeper for smooth
operation, free of binding or sticking.
Ensure cable hook is securely attached to
hoist cable. Inspection shall be in
accordance with Task 2-56.
8
*
Cable Assembly
Clean the length of the cable used during
the last operation, using a clean heavy
lint free cloth. Hold cloth firmly around
cable, which shall aid in the removal of
foreign particles and in detection of
broken wires. Simultaneously check cable
for kinks, bird caging abrasions and flat
spots, as follows:
Kinks are caused by a loop in the cable
being pulled up tight, resulting in a
sharp permanent bend.
Bird caging is stretching or untwisting of
the outer wraps of wire strands.
Flat spots on outer wire strands are
evidence of cable misrouting or misalign-
ment. Align winch drum in accordance with
Task 2-64.
Localized worn sections or abrasions on
outer wire strands are evidence of an
improperly aligned or defective winch
drum. Align winch drum in accordance
with Task 2-64.
Broken wires, strands, bird caging, kinks
or flat spots are cause for cable replace-
ment. Replace cable in accordance with
Task 2-60.
Ten iterations could cause a bird cage effect
at the cable ball at the hook. This is caused
by the outer cable wrapper traveling over the
inner cable downward. If a stretch of 250 feet
with training load were done two times, the
bird cage effect could possibly be stopped
before it happens and thus, save a cable change.
