Onan MCCK - MAINTENANCE

MAINTENANCE
PERFORM ALL MAINTENANCE DETAILS AS SPECIFIED IN THE MAINTENANCE SCHEDULE
CRANKCASE BREATHER - SPEC A ONLY
: Lift off rubber breather cap. Carefully pry valve from
j cap. Otherwise, press hard with both of your thumbs on
top of cap and keep fingers below to release valve from
rubber cap. Wash this fabric flapper-type check valve
in fuel. Dry and install. Position perforated disc toward
engine.
CRANKCASE BREATHER - BEGIN SPEC B
Clean the crankcase breather cap and valve assembly,
and the breather tube baffle in fuel every 300 opera¬
tional hours. To remove breather cap and valve assem¬
bly, remove breather hose clamp and breather tube
clamp.
CAP AND OIL
LEVEL INDICATOR
KEEP
AT THIS
OIL
LEVEL.
NEVER OPERATE
ENGINE WITH OIL
BELOW THIS LEVEI-
LOW
ABOVE S0°F
30°F TO 9C°F
0°F TO 30°F
BELOW 0°F
SAE 50
SAE 30
SAE 10 A87 <
SAE 5
ALWAYS REPLACE
CAP TIGHTLY, OR
OIL LEAKAGE MAY
OCCUR.
CRANKCASE OIL
jOil capacity is four U.S. quarts. Fill to the full mark on
'oil indicator. Use a good quality detergent oil classi¬
fied for service MS or MS/DG. Do not use service DS oil
• at any time. Use a single viscosity oil; oil consumption
is usually higher with multi-viscosity all-weather oil.
Use the proper SAE number of oil for the expected tem¬
perature conditions. Do not mix brands or grades. Ex¬
tremely dusty or low temperature conditions require oil
i change at 50 hrs.
SPEED BOOSTER
Use a fine wire to clean the small hole in the short vac¬
uum tube which fits into the hole in the top of the en¬
gine intake manifold. Do not enlarge this hole. If there
is tension on the external spring when the plant is oper¬
ating at no load or light load, it may be due to improper
adjustment, a restricted hole in the small vacuum tube,
or a leak in the booster diaphragm or gasket.
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