Specifications

TM 9-2330-384-14&P
4-72. PRECHECK SYSTEM MAINTENANCE.
a.
Removal of Precheck Valve
e. Removal of Check Valve
b.
Installation of Precheck Valve
f. Installation of Check Valve
c.
Removal of Pressure Gage
g.
Removal of Precheck Tubing
d.
Installation of Pressure Gage
h.
Installation of Precheck Tubing
Equipment Conditions:
Ref
Conditions
4-68 Tank purged if replacing precheck
system components inside tank.
Materials/Parts:
Two lockwashers
Three elbows
Three grommets
Grease
(Item 12, Appendix E)
Rags
(Item 18, Appendix E)
Antiseize tape
(Item 22, Appendix E)
General Safety Instructions:
When working inside tank, always provide
adequate forced air ventilation at the man-
hole opening with air directed into com-
partment’ where work is being performed.
NEVER work alone inside a tank: a second
person must be stationed at the manhole
opening. The person inside the tank must
have a safety line and harness on in case of
emergency for rescue operations.
Tools:
Tool kit, general mechanic’s
Drain pan
a.
REMOVAL OF PRECHECK VALVE
(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
lockwashers.
4-225