During Engine Operation.

TM 55-1915-200-10

out before adding a new oil charge.

k. Replace and securely close all handhole covers

The entire engine should be sprayed

and engine top deck covers.

with fuel to break up any sludge

deposits and then drained, being

NOTE

careful that the drains are not

When an engine is replaced it is

plugged. Fuel should not be sprayed

important that the entire oil system,

directly on the valve mechanism or

such as oil coolers, filters, and

bearings, as lubrication will be

strainers, be thoroughly cleaned

removed or dirt forced into these

before a replacement engine or the

areas. The surfaces should then be

reconditioned engine is put in

wiped dry before new oil is added to

service. A recurrence of trouble may

the engine.

be experienced in the clean engine if

other system components have been

3-2.1.2. During Engine Operation.

neglected.

In some cases engines have been

a. Check oil pressure gauge (FIGURE 3-5) at top

rear of the reduction gear to ensure oil pressure when

removed from service and stored in

the gear clutch is engaged.

the "as is" condition by draining the

oil and applying anti-rust compound.

b. Recheck lube oil level (FIGURE 3-2) after

When these engines are returned to

engine is at operating temperature. Lube oil level

should be on full mark on dipstick with engine at idle

service, care must be taken to see

speed and oil hot.

that any loose deposits are flushed

FIGURE 3-5. Oil Pressure Gauge.

3-6