(20) and spring (12). Slide gear (5) out through opening
in engine back plate. clean any gasket (13) material
from switch and back Plate.
d. Repair. Repair starter lockout switch by raplac-
ing found to be defective under inspection.
e. Replace. Make certain spacer (16) is on shaft and
slip timing gear (5) through opening in engine back
plate. Make certain that shaft seats properly in gear
cover and that gear teeth are properly meshed. Place
thrust plunger (20) and spring (12) in gear shaft. Slide
switch and gasket (13) over shaft and attach to engine
back plate with two screws (9) and lockwashers (10).
Use a new gasket (13) between switch and engine back
plate. Reconnect electrical connector (8).
f. Adjust. With engine stopped, remove cover retaining
wing nut (1) and remove cover (3). Turn adjusting screw
(14) clockwise until points open. Turn adjusting screw
counterclockwise until points just close (see figure 4-26).
Start engine and disconnect switch from wiring harness at
connector (8, figure 4-25). Adjust adjusting screw for a
0.040 point gap.
Replace cover (3) and wing nut (1).
Reconnect connector (8).
Be sure two wires are recessed in slot of housing
before tightening cover down.
Figure 4-26. Adjusting Starter Lockout Switch
Section XI. MAINTENANCE OF OIL SYSTEM
4-29. FUNCTION AND DESCRIPTION..
The diesel engine has pressure lubrication to all
working parts (see figure 4-27). The oil system
includes oil intake cup, gear type oil pump, bypass.
valve, oil pressure gage, low oil pressure shutoff,
full-flow oil filter, oil cooler, and passages to de-
liver oil throughout the engine. Oil is held in the oil
base, and forced through the oil filter and oil cooler
by the pump. Lines leading to the rocker housing,
passages through the block to crankshaft and front
camshaft bearing, crankshaft passages to connecting
rod bearings and connecting rod passages to piston
pin bushings complete the oil system network. The
bypass valve controls oil pressure by allowing excess
oil to flow directly back to the crankcase.
4-30. OIL COOLER.
a. Inspect (see figure 4-28). On ASK equipped generators,
remove ASK cover assembly (para. 5-3). Inspect oil cooler(1)
for physical damage. Visually check for leaks where oil cooler
Is connected to oil hoses (figure 4-29 or 4-29.1). Check that
cooler is securely fastened to mounting plate (2, figure 4-28)
and that plate is securely fastened to engine. Inspect oil hoses
for leaks and physical damage. inspect seal (1A, figure 4-28)
and replace if damaged. Blower housing must be removed to
inspect cooler and hoses.
b. Service Every 500 operating hours clean oil cooler
fins with air gun (50 psi) held 12 inches away from the
fine. Every 2500 operating hours remove oil cooler and
flush in both directions using solvent at 25 psi.
Remove blower housing. Disconnect
oil cooler hoses at valve of oil filter adapter (see
figure 4-29). Drain cooler into suitable container.
Remove machine screws (3, figure 4-28) and hex
nuts (4) attaching oil cooler (1) and oil cooler seal
(1A) to mounting plate (2) and remove cooler (1).
Remove and check hoses. Plug hose if not used im-
d. Replace. install oil cooler (1) and oil cooler sea (1A) on
mounting plate (2) and secure with screws (3) and hex nuts (4).
Attach oil hoses to cooler as shown in figure 4-29 or 4-29.1.
Replace blower housing shown in figure 4-29 or 4-29.1. Replace
blower housing. Replace any oil lost. On ASK equipped. gener-
ators, replace ASK cover assembly (para 5-3).