TM 5-4240-501-14P
CARBURETION
Air Cleaners
Section 3
CARBURETION
AIR CLEANERS
A properly serviced air cleaner protects the internal parts
of the engine from dust particles in the air. If the air
cleaner instructions are not carefully followed, the dirt
and dust which should be collected in the cleaner, will be
drawn into the engine and become a part of the oil film,
which is very detrimental to engine life; dirt in the oil
forms an abrasive mixture which wears the moving parts,
instead of protecting them. No engine can stand up
under the grinding action which takes place when this
occurs. The air cleaner on every engine brought in for a
check up or repair should be examined and serviced. If
the cleaner shows signs of neglect, show it to the
customer before cleaning, and instruct him on proper
care to assure long engine life.
NOTE: Replace air cleaner gaskets and mounting
gaskets that are worn or damaged, to prevent dirt and
dust
entering
engine
through
improper
sealing.
Straighten or replace bent mounting studs.
Service Oil Foam Air Cleaner
Clean and re-oil air cleaner element every 25 hours or at
three month intervals under normal conditions. The
capacity of the "Oil Foam" air cleaner is adequate for a
full season’s use without cleaning in average homeowner
lawn mower service. (Clean every few hours under
extremely dusty conditions. See Figures 1 and 2
Fig. 1 - Oil Foam Air Cleaner
Fig. 2 - Oil Foam Air Cleaner
OIL FOAM AIR CLEANER (Figs. 1 and 2)
1.
Remove screw or wing nut.
2.
Remove air cleaner carefully to prevent dirt from
entering carburetor.
3.
Take air cleaner apart and clean.
a.
WASH foam element in kerosene or
liquid detergent and water to remove
dirt.
b.
Wrap foam in cloth and squeeze dry.
c.
Saturate foam with engine oil. Squeeze
to remove excess oil.
4.
Reassemble
parts
and
fasten
to
carburetor securely with screw or wing
nut.
Fig. 3 - Cleaning Air Cleaner
DECEMBER, 1980
3
1
