Onan Motor Generator Maintenance - GMC MOTORHOME 1978 Operating Manual

CIRCUIT BREAKER
BREAKER POINT BOX
GOVERNOR LINKAGE
BLOWER SCROLL
ELECTRIC CHOKE
CHOKE LINKAGE
CARBURETOR
Onan Motor Generator (Top View)
Freedom Battery
Freedom batteries need no periodic mainte-
nance. The top is permanently sealed and has
no filler caps. Water will never have to be added .
The test indicator (if so equipped) provides in-
formation for testing purposes only.
ONAN MOTOR GENERATOR
MAINTENANCE
SERVICE INTERVALS
For service intervals refer to the Maintenance
Schedule folder.
CHECKING OIL LEVEL
Check the oil level daily, or at least every
eight hours of operating time. Check more often
on a new unit as oil consumption is generally
higher until piston rings seat properly.
NOTICE:
Motor Generator crankcase is pressur-
ized during operation . Do not remove oil filler
cap and dipstick while unit is running .
Onan Motor Generator (Right Side View)
CHANGING OIL
Initial oil change should be made after the
first 25 hours of operation ; change every 100
hours after that. If operating in extremely dusty
or cold weather conditions, change oil more fre-
quently .
The 6KW Model has an oil capacity of 4
quarts ; 4 1
/2
quarts if replacing oil filter.
Do not mix . brands or grades of motor oil. Use
a good quality oil with the designation SE/CC .
If necessary to add oil between changes, use the
same brand and grade of oil .
Use the following chart as a guide for the
proper oil according to temperature ranges :
TEMPERATURE RECOMMENDED OIL
Above 30°F. (-1 .1'C) SAE 30
0°F (-17 .8°C .) to
SAE 5W30 or 1OW40
30°F. (-1 .1°C .)
Below 0°F . (-17 .8°C.)
SAE 5W30
NOTICE:
Fill engine with oil through dipstick
tube.
The oil drain plug is located on the bottom
side of the engine oil base . Unit must be pulled
out on its slide rail to gain access .
OIL FILTER
Change the crankcase oil filter at least every
200 hours. The filter is located on the right side
of the unit (facing the compartment) . Remove
by turning counterclockwise with a filter wrench .
Before installing new filter, coat the gasket on