Item
No.
12.
TM 10-4610-232-12
Table 4-1. Unit Preventive Maintenance Checks and Services
Interval
Semi–
Annual
Item To Be
Checked Or
Serviced
Air Compressor
Assembly
Procedure
d. Check drive belt for cracks,
rays or breaks.
e. Check belt adjustment (para.
4-81).
f. Drain oil and check for metal
particles on magnetic plug and
milky condition.
g. Replace oil, check that filler
cover is tight and breather is not
cIogged.
h. Check electrical connector box
and cables for tightness and
proper mounting. Inspect for cor-
roded, burnt, loose or missing
cable pins and inserts.
a. Check drive belt and fan
guards for missing, broken, loose
or damaged hardware and
screens.
b. Check for loose or missing
hardware and rigidity of assembly
by manually shaking the frame.
Check for unusual vibration, bro-
ken welds and bent rails.
c. Check fan and sheaves for
wear, cracks and damage.
d. Check drive belt for cracks,
hardness, frays and breaks.
Not Mission
Capable If:
Belt is broken, cracked to
the belt fiber, has more
than one crack (1/8th
inch in depth or 50 per-
cent of belt thickness),
has frays more than 2 in-
ches long or excessive
play (stretched).
Cannot be adjusted be-
tween 8 and 13 Ibs.
Oil is milky or has metal
particles.
Breather unserviceable.
Any cable connection, pin
or insert is damaged or
missing.
Any component is bro-
ken, loose, missing or
damaged.
Any sheave or fan dam-
aged, cracked or missing.
Belt is broken, cracked to
the belt fiber, has more
than one crack (1/8th
inch in depth or 50 per-
cent of belt thickness),
has frays more than 2 in-
ches long or excessive
play (stretched).
Change 2 4-7
