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 55 of 1275
2-8.2 Checking Vehicle Systems
Check for the following:
a. Engine coolant: Check level and specific gravity (TM 9-2350-311-10).
b. Engine oil: Check level (TM 9-2350-311-10).
c. Fuel: Fuel vehicle (TM 9-2350-311-10).
d. Transmission oil: Check level (TM 9-2350-311-10).
e. Fire extinguisher cylinders: Check valve antipilferage seal (item 9, Table 2-1).
2-9 OPERATIONAL PROCEDURES
Before starting vehicle, check TM 9-2350-311-10 for proper starting instructions.
2-9.1 Initial Starting and Break-In
• Engine contains preservative oil upon receipt. Preservative engine oils PE-1 and
PE-2 are identical to engine oils OE-10 and OE-30, except that they contain a
preservative additive. PE-1 and PE-2 will be used in the same manner as the
regularly used engine oils OE-10 or OE-30. PE-1 or PE-2 will also be used in the
transmission until the first scheduled 2000-mile (3219-km) or semiannual oil
change. Refer to TM 9-2350-311-10 and paragraph 2-15 for correct lubrication
instructions.
• Due to internal processing, engine may be hard to start, and may smoke and run
rough. Let it run for 5 minutes and see if it improves. Perform troubleshooting
procedure if engine fails to develop full power after 5 minutes.
a. Start and run engine until preservative oil is out of combustion chambers and engine is operating smoothly.
Check for fuel and oil leaks immediately.
b. Perform complete annual service (para 2-15).
2-9.2 Operations Test
Test vehicle systems for proper operation (TM 9-2350-311-10).
2-9.3 Road Test
Road test vehicle to check and qualify all operational systems (TM 9-2350-311-10).
2-7
NOT E
TM 9-2350-311-20-1
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