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 82 of 1275
TM 9-2350-311-20-1
2-15 PROCEDURES FOR SEMIANNUAL/ANNUAL SERVICES — CONTINUED
ITEM
NO.
19
20
2-34
TABLE 2-1 UNIT PMCS FOR M109A2/M109A3/M109A4/M109A5 HOWITZERS — CONTINUED
INTERVAL
Annual
Annual
ITEM TO BE
INSPECTED
Cooling System,
Radiator Hoses,
and Pumps —
Continued
Coolant
PROCEDURE
(2) Open hull drains.
(3) Cover all exposed openings of engine.
Compressed air used for cleaning purposes will
not exceed 30 psi (207 kPa). Use only with
effective chip guarding and personal protective
equipment (goggles/shield, gloves, etc).
(4) Connect tool to air supply and insert liquid supply
hose into container of cleaning solution.
(5) Insert tool through shroud cover opening and wet
front and back of radiator with cleaning solution. Soak
for approximately 10 minutes.
(6) Remove heavy deposits from face of radiator by
brushing with medium stiff brush that will not damage
radiator fins.
(7) Blast radiator with air/solution mixture, holding head
of tool approximately 0.5 in. (13 mm) from face of
radiator. Alternate from back to front until cleaning
solution flows smoothly through radiator.
(8) Drain container and fill with clean water. Flush
engine parts and radiator completely. Remove liquid
supply hose from container and use air to complete
operation.
(9) Uncover engine openings and install radiator shroud
cover with eight screws. Close hull drains.
Test radiator coolant for proper protection (TB 750-651).
NOT FULLY
MISSION
CAPABLE IF:
Does not pass
alkalinity test in
TB 750-651. Not
protected to
-20°F (-30°C).
WARNING
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