Oil Cooler - TM-10-3930-243-340041

12 Drive gear

1 Bolt

13 Plug

2 Washer

14 Gasket

3 Cover

15 Spring

4 Gasket

16 Oil cooler bypass valve

5 Bolt

17 Plug

6 Washer

18 Gasket

7 Pump body

19 Spring

8 Screw

20 Oil pressure regulator valve

9 Cover plate

21 Oil seal

10 Inner rotor

11 Outer rotor

Figure 3-3. Oil pump, disassembly and reassembly.

(2) Inspect all mounting hardware for

3-3. Oil Cooler

damage.

a. General. The oil cooler is attached directly to

(3) Inspect core for damage. Clean oil passage

t h e cylinder block. Cooling water circulated

with compressed air. Replace damage or defective

through the oil cooler completely surrounds the oil

parts.

cooler core. Therefore, whenever an oil cooler is

e. R e a s s e m b l y . R e f e r t o f i g u r e 3 - 5 a n d

assembled, special care must be taken to have the

reassemble oil cooler.

proper gaskets in place and the retaining bolts tight

f. Pressure Test.

to assure good sealing.

(1) Make a suitable plate and attach to flange

b. Removal.

side of cooler core. Use a gasket made from rubber

(1) Drain cooling system by opening drain

to assure tight seal. Drill and tap the plate to permit

cock at bottom of oil cooler housing.

an air hose fitting to be. attached to inlet side of

(2) Remove any accessories or other equip-

core .

m e n t necessary to provide access to the oil cooler.

(2) Apply approximately 75 psi air pressure

(31 Refer to figure 3-4 and remove the oil

and submerge cooler core and plate assembly in

cooler.

container of water. Any leaks will be indicated by

c. Disassembly. Refer to figure 3-5 and

air bubbles in. the water. If leaks are indicated,

disassemble oil cooler.

replace the core.

d. Inspection.

g. Installation.

(1) Inspect housing for cracks, breaks and

(1) Refer to figure 3-4 and install oil cooler.

other damage.

3-3