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TM 55-1905-223-24-4
REPAIR
Repair at this level of maintenance is by replacement of: bypass valve (4), gasket (5), cooler core (6), oil
cooler gasket (7), helical compression spring (11), and detent plunger (12). Pressurize the cooler to 70
psi and check for leaks by submerging in water.
a.
Plug the cooler and soak in a cleaning solution of detergent and hot
water.
b.
Remove plugs (2, 3) and soak in a solvent.
NOTE
The cooler can be cleaned in a hot tank.
c.
Back flush the oil passages with cleaning solvent and use compressed air
to dry.
d.
Inspect the soldered joints for corrosion or cracks.
e.
Inspect the plunger bore for nicks or scratches. The plunger must move
freely in the bore.
f.
Check the spring using a pressure manometer.
Limits
Valve Open
Assembled
Height:
1.574 inches (39.98 mm)
Height:
1.77 inches (44.98 mm)
Load:
20.5 lbs. (91 N)
Load:
13.5 lbs. (60 N)
ASSEMBLY
a.
Replace detent plunger (12).
b.
Install the spring (11), washer (10) and plug (9) in the fluid filter
head (1). Torque to 60 ft-lb(80 N-m).
c.
Install bypass valve (4). Drive in valve until it bottoms against the step
in the bore.
d.
Install oil cooler gasket (7), cooler core (6), and gasket (5).
e.
Secure fluid filter head with capscrews (8). Torque 18 ft-lb(24 N-m).
f.
Connect turbocharger oil supply lines (para. 2-26).
g.
Fill oil to proper level (PMCS Table 2-1, Item 6).
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