TM 9-2330-384-14&P
4-72. PRECHECK SYSTEM MAINTENANCE.
e.
Removal of Check Valve
Removal of Precheck Valve
a.
f.
Installation of Check Valve
Installation of Precheck Valve
b.
g.
Removal of Precheck Tubing
Removal of Pressure Gage
c.
Installation of Precheck Tubing
h.
Installation of Pressure Gage
d.
General Safety Instructions:
Equipment Conditions:
When working inside tank, always provide
Ref
Conditions
adequate forced air ventilation at the man-
hole opening with air directed into com-
system components inside tank.
partment' where work is being performed.
NEVER work alone inside a tank: a second
Materials/Parts:
person must be stationed at the manhole
Two lockwashers
opening. The person inside the tank must
Three elbows
have a safety line and harness on in case of
Three grommets
emergency for rescue operations.
(Item 12, Appendix E)
Grease
(Item 18, Appendix E)
Rags
(Item 22, Appendix E)
Antiseize tape
Tools:
Tool kit, general mechanic's
Drain pan
REMOVAL OF PRECHECK VALVE
a.
(1) Remove two nuts (9) lock-
washers (10), screws (2), and
washers (1) and remove pre-
check valve (8) from mounting to
shelf of cabinet (11). Discard
4-225
