TM 55-1680-320-23&P
Change 8 2-41
2-11. RESCUE HOIST - INSPECT (Cont)
2-11
Table 2-3. INSPECTION REQUIREMENTS (cont)
Scratch -
Slight tear or break in metal surface caused by light, momentary
contact with foreign material. Scratches shall be blended to remove
sharp edges and prevent injury to personnel. If scratch mars adjacent
surface, both components shall be replaced.
Scratch -
Tear or break in metal surface caused by contact under pressure.
Deeper than scratch. May show discoloration from temperature produced by
friction. Scoring may be a sign of much larger problems. Carefully
inspect mating and adjacent components for damage. Inspect area for
cause of damage and remedy prior to next operation. Repair minor surface
scoring. Replace component if scoring is extensive, or if component is
causing damage to other parts.
Broken wires - broken wires occur as a result of cable damage or as a cable
is nearing the end of its service life.
Kinks - a kink is identified as a permanent bend in a cable caused when a
loop of cable is suddenly pulled tight. A kink may open a lay of cable and result
interference and early failure of the cable caused by abrasion and/or wire breakage.
A kinked cable must be replaced.
Bird caging - bird cages are defined as short lengths of wire rope with outer wire
strands stretched and opened to be formed in the appearance of a bird cage. A
bird cage is a permanent deformation and the cable must be replaced.
Flattened areas - flattened areas of cable result from the application of an excessive force to
a small area of the cable. Such damage can be caused by trapping the
cable in a door or driving a vehicle with a metallic wheel over the cable. A cable with
a flattened area must be replaced.
Abrasion - abrasion is defined as wear of individual wire resulting in flattened
areas on the wire. Abrasive wear can be caused by interference with other components,
dragging the cable over abrasive surfaces or as a result of other cable damage. Cable which
have abrasive damage must be replaced and, if applicable, the cause of the abrasion must
be investigated and repaired.
Necking - necking is defined as the decrease in cable diameter at specific point. Necking is
normally an indication of broken wires
and is cause for cable replacement.
FOLLOW-ON MAINTENANCE:
Repair rescue hoist
(Task 2-14)
END OF TASK
