TM 9-2320-272-24-1
THIS TASK COVERS:
a.
Depressurizing System
c. Cleaning and Flushing System
b. Draining System
d. Filling System
INITIAL SETUP:
APPLICABLE MODELS
EQUIPMENT CINDITION
All
Parking brake set (TM 9-2320-272-10).
Hood raised and secured (TM 9-2320-272-10).
TOOLS
Right splash shield removed (TM 9-2320-272-10).
General mechanic's tool kit (Appendix E, Item 1)
GENERAL SAFETY INSTRUCTIONS
MATERIALS/PARTS
Cooling system must be depressurized to remove
Cleaning compound kit (Appendix C, Item 19)
surge tank cap when engine temperature is above
Antifreeze (Appendix C, Item 8 or 9)
175F (79C).
REFERENCES (TM)
TM 9-2320-272-10
TM 9-2320-272-24P
WARNING
Care should be taken when removing surge tank filler cap. Steam
or hot coolant under pressure may cause injury to personnel.
If engine is hot, place thick cloth over cap and turn cap to first stop. Wait until pressure has escaped then
remove cap from surge tank.
NOTE
Have drainage container ready to catch coolant.
1.
Remove cap (1) from surge tank (2) and open drainvalve (4) on radiator (3) and allow system to
drain.
NOTE
Open drainvalve on aftercooler to permit cooling system to fully
drain.
2.
Open aftercooler (6) drainvalve (5) on M939A2 series vehicles and allow cooling system to drain.
3.
Inspect coolant for rust and foreign particles.
4.
If drained coolant is heavily rusted, the partially clogged system must be cleaned and flushed.
c . Cleaning and Flushing System
Clean and flush radiator (3) and cooling system with cleaning compound kit. Follow instructions provided
with kit.
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