6.
When disassembling engine,
mike
bearing plate
gasket thickness. Then select proper shim
thickness for correct end play.
Shims establish end play. Only one thickness gasket is
included in kit.
7.
When assembling crankshaft, make sure bearing
thrust washers are in proper position supported
by bearing stop pins. Use cup grease to hold in
-
place.
8.
When adjusting valve lash, tap rocker arm
so
it is
9.
Crank gears are easier to remove and install if
straight when checking with feeler gauge.
heated a slight amount.
Do
not overheat or temper may be lost
and shaft may expand.
10.
See
FUEL SYSTEM
section for correct engine
time for specific model.
11.
Allow some gear lash (approximately 0.005-inch)
in oil pump.
Do
not install gears tightly against
each other!
TESTING AND ADJUSTING ENGINES
Preparation
Check the following:
1.
Put
proper oil in crankcase.
2.
Service air cleaner.
3.
Connect fuel line.
4. Connect load.
5.
Connect fully charged battery.
6.
Check ventilation for proper cooling.
OPERATION
1.
Start engine.
2.
Check o.il pressure.
3.
Run unit
15
minutes to bring up to operating
temperature.
'
4. Check for oil leaks, loose electrical connections,
tight fuel lines and tight exhaust connections.
ADJUSTMENTS
Adjust governor for speed and sensitivity.
IMPORTANT:
For complete customer satisfaction, repaint unit
(Onan Green, spray can 525-0137, or Onan White, spray can 525-
0216) and apply instructions from Kit
98-11OOC
or Marine Kit
98-
1807.
CYLINDER HEADS, VALVES
Each cast iron cylinder head assembly has alloy
hard en ed-f aced valves,
re1
ease-ty pe rotato rs
,
al
I
oy
hardened inserts, guides, rocker arms, injection
nozzles and glow plugs. The push rods run through
'
shields.
Maintenance:
Check the valve clearances at regular intervals (see
SERVICE AND MAINTENANCE
section).
In
addition,
clean the combustion chambers and valve seats at
regular intervals.
VALVE CLEARANCE ADJUSTMENTS
The valves are adjusted cold. Afterthecooling period,
adjust
No.
1
cylinder first and the rest in the firing
order.
RDJE Engines
To
adjust valve clearance, on
RDJE
engines, proceed
as follows:
1.
Rotate flywheel clockwise until cylinder number
is up on acompression strokeand theTC markon
the flywheel lines up with the timing pointer on
the gear cover, then turn
10-45"
past TC to be
sure lifter moves off ramp of cam. Adjust both
valves, intake and exhaust, to
0.017
inch
(0.43
mm).
In this position, both valves will be closed and the rocker
arms
are free to move slightly indicating maximum clearance.
EXHAUST
VALVES
I\
0.017"
(0.43
rnm)
AOJUST
VALVE
CLEARANCE
HE
VALVE
SEAT
FIGURE
51.
SETTING VALVE CLEARANCES
43
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