Lubrication System
02
060
7
RG,RG34710,212 –19–12AUG99–2/3
RG8771 –UN–10DEC97
Oil Cooler and Housing Assembly
A—Oil Cooler Housing
B—Gasket
C—Oil Cooler
D—Nut (2 Used)
E—O-Ring (2 Used)
4. Remove two large hex nuts (D) securing oil cooler (C)
to housing (A) and remove cooler from housing.
Remove and discard gasket (B) and O-rings (E).
5. Clean all parts and flush oil cooler with solvent. Dry
with compressed air.
6. Thoroughly inspect oil cooler for plugging, damage, or
leaks.
NOTE: If mixing of oil and coolant is suspected, pressure
test oil cooler in liquid and compressed air. Use
specified air pressure for testing. Replace oil
cooler as necessary.
Specification
Oil Cooler—Test Pressure 140—170 kPa (1.4—1.7 bar)
(20—25 psi)
...........................
IMPORTANT: When installing oil cooler into housing,
ensure that face of both mounting nuts
is square to threads for proper torque.
7. Apply TY9473 LOCTITE

242 Thread Lock and Sealer
to oil cooler hex nuts.
8. Install oil cooler in housing using a new gasket and two
new O-rings. Tighten two large hex nuts to
specifications.
Specification
Oil Cooler-to-Housing Nuts—
Torque 50 N•m (37 lb-ft).............................................................................
9. If removed, install oil cooler drain cock handle and
tighten to specifications.
Specification
Oil Cooler Drain Cock Handle—
Torque 3 N•m (25 lb-in.)..............................................................................
10. If removed, install oil cooler housing expansion plug
and tighten to specified depth.
Specification
Oil Cooler Expansion Plug—
Installed Depth Flush to 1.5 mm (0.059 in.)
Below Surface
................................................
LOCTITE is a registered trademark of Loctite Corp.
CTM100 (06APR04)
02-060-7
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=275
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