Table 7-2. Preventive Maintenance Checks and Services for Compressed Air System (Continued)
Q - Quarterly
S - Semiannually
A - Annually
CHECK FOR AND HAVE
IS NOT READY/
REPAIRED OR ADJUSTED
B D A D W M Q S A
Semiannually, replace both air filters
with new assemblies (FSCM 16327, P/N
Z66A, muffler assembly, intake).
g. Check Barges 2 and 3 pulley clamp bolts
and setscrews for tightness and drive
belts for correct tension, condition, and
alignment as follows:
1) Drivebelt replacement:
(a) Shut down air compressor
(b) Redtag power panel 1 circuit
breaker 3P5 indicating,
"WARNING - DO NOT ACTIVATE.
REPAIRS BEING MADE."
(c) Remove belt guard from compres-
sor by unscrewing three bolts (two
have spinlock nuts). Place bolts,
washers, and nuts with guard
and place where it will not be
(d) With two V-belts exposed, check
appearance for frayed, worn, or
extra hard and shiny edges or
breaks in underneath side of belts.
If belts show these signs, belts
must be replaced in pairs
(FSCM 16327, P/N 3X645).
(e) Loosen four belts holding electric
motor to base plate, slide motor
towards compressor until belts
can be slipped off pulleys. Discard
(f) With belts off, and using a torque
wrench, check tightness of bolt
holding compressor pulley on
compressor shaft. Torque to 500
in-lb. With normal wrench, check
tightness of setscrew holding
puley on electric motor shaft.
Setscrew must be wrench tight.