Crankcase and Oil System. (Cont)

TM 43-0156

Step

Function

Mech

Insp

1 Completely drain the crankcase, oil filters, and

cont

lube oil strainer.

2 Remove oil filter elements.

3 Connect a portable pump to the output of the

scavenging oil pump.

4 Pump MIL-L-21260, type I, grade 30 preservative

oil until preservative oil is observed in the lube

strainer.

5 Disconnect pump from the scavenging pump.

6 Connect portable pump to the lube pump output.

7 Pump MIL-L-21260, type I, grade 30 preservative

oil through the lubrication system until preserva-

tive oil is seen coming from the camshaft bearings

1 and 9 (located on top of the engine toward the

radiator end).

8 Turn the engine over at least two full revolutions

while pumping preservative oil through the oil

system.

9 Disconnect the portable pump.

10 Connect a portable pump to the piston cooling pump

output.

11 Pump MIL-L-21260, type I, grade 30 preservative

oil though the system.

12 Open access covers to the crankcase to observe

when the preservation oil starts coming from the

piston cooling tubes.

13 Turn the engine over two full revolutions while

pumping preservative oil.

14 Disconnect the portable pump.

15 Atomize spray the underside of the pistons and

rods.

16 Close and secure the access covers.

17 Allow time for the engine to drain (approx 20

min). Completely drain the crankcase oil filters

and lube oil strainer of any oil.

B-3-4