3-42. OIL COOLER REPAIR (Contd)
Perform steps 20 and 21 for M915/Big Cam I only.
Perform steps 22 and 23 for M915A1/Big Cam III only.
Inspect for cracks, damaged
Discard any part where cracks,
threads, and excessive corrosion.
stripped threads, or excessive
corrosion is found.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with
effective chip guarding and protective equipment such as goggles or shield, gloves, etc.
Failure to comply may result in injury to personnel.
Filter element (6)
Inspect and repair as follows:
a. Seal one end of tube bundle.
Refer to steps 21c and d for repair.
Install suitable air fitting on
opposite end and connect
compressed air supply line.
Immerse tube bundle in water and
apply approximately 40 psi (276 kPa)
air pressure. If air bubbles are
observed, mark bundle for repair
b. Inspect cover (15) for broken or
cracked welds. Repair or replace
c. Header leaks may occur where
tubes protrude through plate or
where header is soldered in case.
d. Repair damaged tubes by
Use caution not to damage
inserting a smaller outside
adjacent tubes or header material
diameter tube inside damaged
with heat while soldering. If more
tube. Cut, flare, and solder both
than 5 percent of the tubes are
defective, discard filter element (6).