TM 9-2320-260-34-1
3-12. OIL COOLER MAINTENANCE (Contd)
WARNING
Drycleaning solvent is flammable and will not be used near open
flame. Use only in well ventilated places. Failure to do so may
result in injury to personnel.
Compressed air source will not exceed 30 psi (207 kPa). When
cleaning with compressed air, eyeshields must be worn. Failure
to wear eyeshields may result in injury to personnel.
CAUTION
Clean cooler element and housing as soon as possible after
removal. Failure to do so may cause damage to equipment.
1. Clean end cover (2) and housing (1) with drycleaning solvent.
2. Inspect end cover (2) for cracks and breaks. Replace cover (2) if cracked or broken.
3. Inspect housing (1) for cracks, breaks, and stripped threads. Replace housing (1) if cracked, broken,
or threads are stripped.
4. Soak and flush cooler element (3) with drycleaning solvent.
5. Inspect element (3) for broken and cracked welds. Replace element (3) if welds are broken or cracked.
NOTE
For step 6 use oil cooler tester (3375253).
6. Check element (3) for leaks:
a. Install end plates on ends of element.
b. Move sliding plate along fixture bars until fixture will fit over element and end plates, then
install two locking clips into fixture bars.
c. Adjust fixture length by loosening two nuts and place element and end plates in to fixture.
Ensure that air connection fitting on end plate extends through notch in fixture plate.
Tighten nuts.
d. Connect air supply line, equipped with a quick disconnect fitting, to air connection fitting.
e. Controlling air pressure with air pressure regulator and three way discharge valve, apply 40 psi
(276 kPa) of air pressure to element (3).
f. Completely immerse element (3) and oil cooler tester assembly in water.
g. Replace element (3) if bubbles are observed.
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