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
(g) Place two new belts on compres-
sor pulley and then on motor
(h) Pull motor away from compressor
until belts are as tight as possible
and while another crew member
holds motor in this position,
tighten four bolts holding motor to
When installing new pulley belts, make
sure belt tension is as tight as possible.
Pulley belts stretch with use and must
be checked for proper tension at next
monthly maintenance service.
(i) With a straight edge, check that
pulleys are at right angles to their
shafts and that belts in their
grooves are running straight. If
not, slightly loosen bolts holding
electric motor and move motor
until pulleys and belts are running
straight in their grooves and are
square with compressor and
motor shafts. Tighten motor bolts.
Again check alignment with
straight edge. If not properly lined
up, loosen motor bolts and try
again. When belts are straight,
tighten four motor bolts wrench
2) Belt alignment/tension check:
(a) Shut down air compressor
(b) Redtag power panel 1 circuit
breaker 3P5 indicating,
"WARNING - DO NOT ACTIVATE.
REPAIRS BEING MADE."