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 81 of 1275
TM 9-2350-311-20-1
ITEM
NO.
19
INTERVAL
Annual
ITEM TO BE
INSPECTED
Cooling System,
Radiator Hoses,
and Pumps
PROCEDURE
a.
b.
c.
d.
WARNIN G
Do not remove a radiator cap from a warm
engine. Steam and hot gases can bum
severely.
Check for cracked, weak or broken hoses.
Check coolant system for leakage.
Check coolant level.
Remove shroud cover and inspect drive shafts for
excessive wear and loose rubber-boots.
e. Radiator should be cleaned with a radiator cleaning
tool (item 12, Appx H) and a cleaning agent which
removes deposits of sand, oil, clay and other debris
from radiator cooling fins.
NOTE
Cleaning agent can be a solution of one part
detergent to five parts water, or nontoxic,
nonflamable solvent and water. The cleaning
agent may be mixed one part detergent to five
parts water.
Clean radiator as follows:
(1) Remove eight screws (28) and shroud cover (29).
NOT FULLY
MISSION
CAPABLE IF:
Any weak,
cracked, or
broken hoses or
any coolant
leak. Drive shaft
boots tom or
loose.
2-33
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