until a minimum coolant temperature of
160F (71°C) is obtained. Then shut
engine off and move MAINTENANCE
LOCKOUT switch to MAINTENANCE
Remove oil drain plug on skid base (figure
1-1), then open engine oil drain valve and
allow oil to drain into a container.
(3) Install drain plug and close oil drain valve.
Add oil to full mark.
(4) Move MAINTENANCE LOCKOUT switch
to OPERATION position. Start and
(5) Stop engine and allow oil to drain back
into crankcase before rechecking oil level
using dipstick. Check for leaks.
Do not remove dipstick when engine is
operating. Use oil level sight gauge to
monitor oil level while engine is running.
Oil Filter Service. (See figure 4-47).
(1) Refer to Chapter 13 of the Intermediate
(Field) (Direct and General Support) and
Depot Level Maintenance Manual (A)
TM5-6115-593-34 for servicing of the
bypass oil filters. Note that the service
function is the same
as replacing the filters.
(2) Service spin-on type oil filters (see figure
4-47) as follows:
Oil pressure drop reading across filters is
the best way to determine change
periods. If pressure drop from inlet to
outlet exceeds pressure logged after
latest installation of spin-on oil falters by
more than 10 psi (0.7 kg/cm ) with 140F
(60C) oil temperature, change the filters.
(a) Drain the oil system, par. 4-8b.
(b) Unscrew, remove, and discard the filters
(c) Fill new filters with proper lubricant (see
table 3-1), attach new gaskets and screw
on new filters. Hand tighten, then turn an
additional three-fourths of a turn.
(d) Fill engine to "H" mark on dipstick.
(e) Run engine and check for leakage.
(f) Stop engine and allow several minutes for
oil to drain back to oil crankcase, then
(g) Run engine and record oil pressure
(h) Check/reset sight gauge per par. 4-8 a
4. Upper body
Figure 4-8A. Crankcase Breather