OIL
LEVEL
Check theoil level daily oral least every eight hours of
operating time. Check more often on a new unit as oil
consumption is higher until the piston rings seat
properly.
OIL
CHANGE
Initial oil change should be made after the first 25
operating hours; change every 100 hours after that. If
operating in extremely dusty conditions or in cold
weather, change oil more frequently.
Oil capacity is 4 quarts, 4-1/2 quarts if replacing the
oil filter too. Do not mix brands orgradesof motoroil.
Use only a good quality oil with the designation
SE/CC (former designation was MS, MS/DG). If
necessary to add oil between changes, use the same
brand and grade of oil as is already present in the
crankcase.
OIL FILTER
Change the crankcase oil filter every 200 hours;
change more frequently in extremely dusty
con-
ditions. Remove the filter by turning
counterclockwise with a filter wrench. Before install-
ing a new filter, coat the gasket on the filter base with a
light film of new
oil:
Install by turning clockwise until a
light friction is noted, then turn an additional 1/2
turn.
See Figure 23.
-OUTLET COVER
- ELEMENT
^ INLET COVER
FIGURE 24. AIR CLEANER
CAUTION
Oo not overtighten the filter as damage may
occur to the rubber gasket which will cause
the filter to leak. Be sure to install sealing ring around the filter; this
ring is an air seal to prevent cooling air loss.
AIR CLEANER
ELEMENT
Check element every 100 hours.-Clean by tapping
base gently on a flat surface. Replace the element
every 400 operating hours; clean or replace .more
frequently in dusty conditions (Figure 24). • . .-
FIGURE 23. OIL FILTER
SPARK PLUGS
Check, clean and reset spark plugs every lOOhours of
operation.
Replace spark plugs that show signs of
fouling or electrode erosion. Spark plug gap for
gasoline-fueled units is .025", for gaseous-fueled
units,
gap is .018". Replace plug at least every 250
hours of operation.
CRANKCASE BREATHER
The engine is equipped with a ball check valve for
maintaining crankcase vacuum. No maintenance is
generally required. Should the crankcase become
pressurized, as evidenced by oil leaks at the seals or
around the cap of the oil level indicator, clean the
baffle in suitable solvent.
CARBURETOR
BOWL
Remove the carburetor bowl from the carburetor
every 400 hours and clean the screen in a suitable
solvent. Blow out with low pressure, compressed air
and reassemble, making sure gaskets are in place.
18
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