OIL FILTER CHANGE
Refer to Periodic Maintenenace Schedule (located in
the Operator’s Manual) for oil filter change interval.
If
operating in extremely dusty, high ambient, or low
ambient conditions, change oil filter more often.
Spin
off
oil filter element and discard
it.
Thoroughly
clean filter mounting surface and make sure new gasket
is inserted in the element. Apply a thin film of clean oil to
the gasket. Spin element down by hand until gasket just
touches mounting pad and then turn down an additional
1
/2-3/4 turn.
Do
not overtighten.
With oil in crankcase, start engine and check for leaks
around filter element. Retighten only as much as
necessary to eliminate leaks; do not overtighten.
CRANKCASE BREATHER
The crankcase breather prevents pressure from building
up in the crankcase. It also prevents oil contamination
by removing moisture
or
gasoline vapors and other
harmful blow-by materials from the crankcase. These
vapors are routed to the carburetor where they are
mixed with incoming air and burned in the combustion
chamber.
A
sticky breather valve can cause oil leaks,
high oil consumption, rough idle, reduced engine power,
and a rapid formation of sludge and varnish within the
engine.
Crankcase Breather
Service
If the crankcase becomes pressurized as evidenced by
oil leaks at the seals
or
excessive oil in the air cleaner
housing, use the following procedure to service.
Most parts cleaning solvents are
lZiEiEl
flammable and can cause severe
personal injury or death if used improperly. Follow the
manuiac turer’s recommendations when cleaning parts.
P216, P218, P220 (Spec
A
and 8)
Remove the breather tube from the valve cover (Fig-
ure 3A). Remove capscrew, flatwashers, valve cover,
pack, spring, washer, reed valve, and breather baffle.
Discard gasket and clean all parts in part cleaning
solvent.
Overtightening the valve cover can
k@!!@@l
cause engine damage.
Do
not over-
tighten value cover.
The reed valve must be flat with no sign of a crease.
Assemble using
a
new gasket. Refer to ASSEMBLY
TORQU€Sforvalve cover capscrew torque specification.
P216, P218, P220 (Beginning Spec
C)
The crankcase breather does not require servicing.
Replace breather if it’s broken or cracked or
if
crankcase
becomes pressurized as evidenced by oil leaks at the
seals
or
excessive oil in the air cleaning housing.
P224
Remove the breather hose from cap and valve assembly.
Remove cap and valve assembly and wash in a suitable
solvent. Replace cap and valve
if
balls do not move
freely. Pull pack out and wash in solvent. To allow free
operation
of
the valve, screens must be positioned as
shown in Figure
3B.
REEDVALVE
-cT’a,
CLAMP
-PACK
C-1003
FIGURE
3A.
CRANKCASE
BREATHER
-
P216, P218, P220
BREATHER
m
TUBE
‘lrl-,
HOSE
CLAMP
-
CLAMP
-
PACK
FIGURE
38.
CRANKCASE
BREATHER
-
P224
6-2
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