TM-9-2350-311-20-1
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS
AUGUST 1994
TM-9-2350-311-20-1 - Page 83 of 1275
TM 9-2350-311-20-1
ITEM
NO.
21
22
23
INTERVAL
Annual
Annual
Semiannual
ITEM TO BE
INSPECTED
Cooling System
Pressure Relief
Valve
Exhaust Ducts
Fuel Tank and
Heat Shield
PROCEDURE
Remove and clean pressure relief valve as follows:
a. Unscrew nut (30) and remove hose (31) from lower
end of relief valve (32).
b. Remove four screws (33). Lift off relief valve (32).
c. Wipe off accumulation of rust. Depress spring to
ensure it is not broken.
d. Install pressure relief valve (32) (para 7-5).
Check and replace all damaged components. Check all
clamps (34) and mounting bolts (35).
Inspect the upper fuel tank and lower tank heat shield
for damage. Check condition and tightness of all seals
and fasteners (para 6-20).
NOT FULLY
MISSION
CAPABLE IF:
Any screws
missing,
coolant leaks, or
any missing or
broken valve
parts.
Any damaged
component,
loose clamps, or
exhaust leaks.
Any Class Ill
leaks. Upper
heat shield
missing. Seal
cracked or loose
fasteners.
2-35
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