Onan MCCK - Page 22

Tighten Screws
15 to 17 in. lbs. IMPELLER
PUMP BODY
WATER PUMP IMPELLER
Remove water pump cover and inspect neoprene impell¬
er. If worn or damaged, install new impeller. Pump
should discharge a nominal 3.5 U.S. gallons per min¬
ute when thermostat is open. Install pump cover air
tight to avoid early failure of impeller.
GOVERNOR LINKAGE
Do not lubricate plastic
ball joints; they require
cleaning only.
SPARK PLUG GAP
0.025” GASOLINE
0.018” GAS FUEL
FUEL SEDIMENT
Periodically clean fuel filter and carburetor filter (strainer)
bowls of any accumulated sediment. Clean filter screen
thoroughly. Assemble and check leaks.
GASOLINE
Use regular grade automobile gasoline. Do not use highly
leaded premium types. Never fill the tank when the engine
is running. Leave some tank space for fuel expansion.
DRIVE BELT TENSION
Check pump drive belt for 1/2” deflection by depressing
belt between pulleys with thumb. Adjust tension by
loosening engine water pump mounting screws and chang¬
ing pump position as required.
MAINTENANCE SCHEDULE
Use this factory-recommended maintenance schedule
(based on favorable operating conditions) to serve as
a guide to get long and efficient plant life. Neglecting
routine maintenance can result in failure or permanent
damage to the plant. Maintenance is divided into two
categories: (1) Operator Maintenance - performed by
the operator, (2) Critical Maintenance performed by
qualified service personnel (Onan dealer). A Major Serv¬
ice Manual is available (See General Information page).
OPERATOR MAINTENANCE SCHEDULE
(ParfofJ by •wr)_
MAINTENANCE
ITEMS
OPERA!
MONAL HOURS I
8
"50 100 200
|
Inspect Plant
X
■ III 11 ■ J'l IW^—
X
■
Check Oil Level
X
Check Flame Arrester
X
HU
■ SBZli&DIEUinZHaMHi
K»
IH
*
■ ■ 1
| Change Crankcase Oil
KU
■
n
X
Hi:
Check Battery
N
KS
__
■
x I - Perform more often in extremely dusty conditions.
CRITICAL MAINTENANCE SCHEDULE
(Parferawl by 0 *m Dealer)_
MAINTENANCE
ITEMS
OPERATIONAL HOURS
200 500 lOOfl 5000
Check Breaker Points
Clean Commutator and
Collector Rings_
Check Brushes
xl
TT
Remove Carbon 8< Lead
Check Vatve Clearance
Clean Carburetor
Clean (generator
Clean Oil Base
Remove A 1 _
Grind V aTves (I f Requi r ed)
General Overhaul (If Required 1 ! -
For any abnormalities in operation, unusual noises from
engine or generator, loss of power, overheating, etc,,
contact your ONAN dealer.
xl - Perform more often in extremely dusty conditions,
x2 - Replace revolving field collector ring brushes when
worn to 5/16” or less -Replsce all other brushes
when worn to S/8” or less
BOLT TORQUES
FT-LB
Tappets (Intake & Exhaust)
0.012” to 0.015"
Spark Plugs
25-30
Ignition Breaker Points Gap
0.020"
Cylinder Head
29-30
Ignition Timing
25° BTC
Oil Base Mounting
43-46
Spark Plug Gap
0.025”
MAJOR SERVICE MANUAL IS AVAILABLE - SEE GENERAL INFORMATION
21