Oil Cooler - TM-10-3930-634-340031

TM 10-3930-634-34

(4) Replace all defective parts.

(2) Inspect pulley for cracks, and damaged or

worn grooves. Replace as necessary.

e. Reassembly.

(1) Upon reassembly, use a new seal, shaft as-

(3) Hold the shaft of the bearing and shaft as-

sembly, and cover gasket.

sembly and revolve the outer race of the bearing slow-

(2) Refer to figure 3-3 and reassemble the water

ly by hand. If rough or tight spots are detected, replace

pump.

the bearing and shaft assembly.

f . Installation. I n s t a l l t h e w a t e r p u m p ( T M

f. Reassembly. Reassemble the fan in reverse of

10-3930-634-12).

numerical sequence as shown in figure 3-4.

g. Installation. Install the fan and drive belts on the

3-4. Fan

engine (TM 10-3930-634-12).

a. General. The engine cooling fan is driven by a set

of V-drive belts from the crankshaft pulley. The fan is

3-5. Oil Cooler

mounted on a combination fan hub and pulley which

a. General. The oil cooler is attached to an oil cooler

rotates on a sealed ball bearing assembly.

adapter attached to the cylinder block. The flow of oil

b. Removal. Remove drive belts and fan from

is from the oil pump through a passage in the oil cooler

engine.

adapter to full flow oil filter, and then through the oil

c. Disassembly. Disassemble the fan in numerical

cooler core and cylinder block oil galleries.

sequence as shown in figure 3-4.

b. Removal.

d. Cleaning. Clean all parts, except the bearing and

(1) Drain oil cooling system by opening drain cock

shaft assembly (10, figure 3-4) with cleaning solvent

at bottom of cooler housing.

(Fed Spec P-D-680) and dry thoroughly. Wipe the

(2) Remove fuel filter, oil filter, and water pump

bearing and shaft assembly with a clean, lintless cloth.

(TM 10-3930-634-12).

e. Inspection.

(3) Refer to figure 3-5 and remove the oil cooler,

(1) Inspect the fan for loose blades, elongated

c. Disassembly. Disassemble the oil cooler in nu-

holes, cracks, or other damage. Replace a defective

merical sequence as shown in figure 3-6.

blade.

3-3