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 74 of 1275
TM 9-2350-311 -20-1
2-15 PROCEDURES FOR SEMIANNUAL/ANNUAL SERVICES — CONTINUED
ITEM
NO.
2
3
4
5
6
TABLE 2-1 UNIT PMCS FOR M109A2/M109A3/M109A4/M109A5 HOWITZERS — CONTINUED
INTERVAL
Semiannual
Semiannual
Semiannual
Semiannual
Semiannual
ITEM TO BE
INSPECTED
Starter
Engine
Steering Control
Brakes
Fuel System
PROCEDURE
While starting engine, listen for unusual noises and
difficult cranking at starter.
Listen for unusual noises, hesitations, and varying idle
speed.
Move steering wheel through its entire range and
observe if steering response is satisfactory. With vehicle
operating at 15 to 20 mph (24 to 32 km/h) and steering
wheel centered, observe if steering wheel wanders or
pulls to one side.
Accelerate vehicle to 15 mph (24 km/h). Release
accelerator pedal, and apply brakes. Vehicle should
stop without pulling to one side. With vehicle stopped on
an incline, and with transmission in neutral, depress
brake pedal and apply parking brakes. Brakes should
lock securely and hold vehicle in place. Adjust brakes, if
required (para 9-10).
a. Change fuel filter elements (1) (primary and
secondary), personnel heater fuel filter element, and
coolant heater fuel filter element (2) (para 6-6, 6-7, 11-
21, and 14-6), personnel heater fuel pump strainer
element (3) and coolant heater fuel pump filter element
(para 11-23 and 14-5).
b. Check all fuel lines and fittings (4) for serviceability
and evidence of leaks.
NOT FULLY
MISSION
CAPABLE IF:
Any unusual
noise or difficult
cranking.
Any unusual
noises,
hesitation, or
varying idle
speed.
Linkage bent,
broken, or out of
adjustment.
Brake pedal
goes to floor and
will not stop
vehicle
a. Cracked or
broken fitting
and fuel lines.
Any bent fuel
line that would
restrict or stop
fuel flow.
b. Any class Ill
leaks.
2-26
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