Service And Maintenance - Onan NHC Series Operator's/Service Manual And Parts Catalog

SERVICE AND MAINTENANCE
SERVICE THESE ITEMS
AFTER EACH CYCLE OF INDICA1 FED HOI JRS
SERVICE THESE ITEMS
8
50 ] 100 200 500 1000 5000
Inspect Engine Generally
X
Check Fuel Supply
X
Check Oil Level
X
Clean Governor Linkage
X *
Change Crankcase Oil x l
X *
Check Breaker Points
X
Check Battery Electrolyte Level
X
Clean Fuel Filter
X
Check Spark Plugs
X
Replace Oil Filter
X *
Replace Air Cleaner
X *
Remove Deposits in Combustion Chamber
X
Check Valve Clearance
X
Inspect Valves, Grind if Necessary
X
Complete Reconditioning
X
x* - Perform more often under dusty or extreme cold weather conditions.
x l - Recommended interval i n hot weatner or heavily loaded natural gas and propane operation.
PERIODIC MAINTENANCE SCHEDULE
Regularly scheduled maintenance is the key to lower
operating costs and longer service life for the unit.
The above schedule can be used as a guide. However,
actual operating conditions under which a unit is run
should be the' determining factor i n establishing a
maintenance schedule. When operating i n very dusty
or dirty conditions, some of the service periods may
have to be reduced. Check the condition of the crank-
case o i l , the f i l t e r s , etc. frequently u n t i l the proper
service time periods can be established. When any
abnormalities occur i n operation — unusual noises from
engine or accessories, loss of power, overheating, etc.
— contact your Onan dealer.
CRANKCASE OIL
The o i l capacity is 3-1/2 U.S. quarts (4 with f i l t e r ) .
F i l l to the " F U L L " mark on the o i l level indicator.
Use a good quality, detergent o i l w i t h the A P I
(American Petroleum Institute) designation SE or
SE/CC. Do not use an o i l w i t h the designation CD
unless i t is also designated SE and the o i l manufacturer
certifies i t w i l l perform satisfactorily in gasoline
engines. Ambient temperatures must be the factor for
determining the proper SAE o i l weight.
IMPORTANT: Use low ash content oils .03:85 percent
by weight with natural gas or propane fueled engines.
NOTE: // of/s with these designations are not yet
available, use oil with the API designation MS, MS/DG
or MS/DM which has passed all the Automotive Manu-
facturer's Sequence Tests and the MIL-L-2104B Tests.
Don't use an oil with the API designation DS.
When adding o i l between changes, always use the same
brand and weight that is i n the crankcase. Various
brands of o i l may not be compatible when mixed
together.
CAP ANO OIL
L E V E L INDICATOR
KEEP OIL
AT THIS L E V E L .
NEVER OPERATE
ENGINE WITH OIL
BELOW THIS L E V E L .
A874
- F U L L
- L O W
ALWAYS REPLACE
CAP TIGHTLY, OR
OIL LEAKAGE MAY
OCCUR.
FIGURE 5. OIL L E V E L INDICATOR
12