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
When bleeding receiver drain cock,
ALWAYS use protection shield to protect
eyes and face from flying particles. Wear
gloves and avoid skin damage by rolling
down shirt sleeves on clothing and closing
buttons and collars.
Open drain cock on bottom of receiver
to drain air and water. Turn small
handle clockwise. When receiver
pressure reads 0 psi, close drain cock.
Open drain valves on bottom of air filters
1 and 2.
Open air station valves 1 through 5 and
7 by turning counter-clockwise until they
stop. Leave them open.
Make sure air station valves 6, 8 and 9
Check that receiver pressure gauge indi-
cates no more than 155 psi when com-
pressor set for AUTO. If pressure
than 155 psi.
greater, pull test link on air safety valve.
If air does not escape, replace safety
valve. Valve cannot be adjusted or
repaired. To replace valve:
1) Shut down air compressor system.
2) Redtag power panel 1 circuit breaker
3P5 to indicate, "WARNING - DO NOT
ACTIVATE. REPAIRS BEING MADE."
3) Unscrew safety valve.
4) Screw in new safety valve (Barge 1 -
P/N 9710-5332-00) (Barges 2 and 3 -
P/N 91A0331 75-001) wrench tight.
5) Start air compressor system.