TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 634 of 1417
CLEANING AND INSPECTION
WARNING
Solvent cleaning compound is flammable and toxic. Do not use near an open flame and
always have a fire extinguisher nearby when solvents are used. Use only in well-ventilated
places, wear protective clothing, and dispose of cleaning rags in approved container. Failure
to comply may result in damage to equipment, injury, or death to personnel.
NOTE
To prevent hardening and drying of foreign substances, clean cooler element as soon as
possible after removal.
1.
Clean cooler housing (Figure 3, Item 1) with solvent cleaning compound and inspect for cracks and stripped
threads. Replace cooler housing if cracked or threads are stripped.
2.
Soak and flush oil cooler element (Figure 3, Item 2) with solvent cleaning compound and inspect for broken
and cracked welds. Replace cooler element if broken or cracked.
WARNING
Eyeshields must be worn when cleaning with compressed air. Compressed air source will
not exceed 30 psi (207 kPa). Failure to comply may result in injury or death to personnel.
3.
Immerse oil cooler element (Figure 3, Item 2) in water, apply 30 psi (207 kPa) air pressure, and plug opposite
end. Replace oil cooler element if air bubbles are observed.
1
2
M9338DAA
Figure 3.
Engine Oil Cooler Cleaning and Inspection.
END OF TASK
TM 9-2320-272-23-2
0233
0233-5
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