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TM 10-3930-671-24
4.9. Engine Air Cleaner
Air Cleaner Maintenance ................................................................................F-103
Air Cleaner ..................................................... ................................................F-104
Air Cleaner Assembly .....................................................................................F-105
Air Cleaner Removal ........................................ ..............................................F-106
Air Cleaner Installation ........................................ ...........................................F-106
Canister Dry Air Filter Service ........................................................................F-106
General Procedures
The reason for providing an air cleaner for the engine is
to protect the engine; that is, to prevent abrasive dust
and dirt from entering the cylinders and causing
excessive wear. All air contains some dust and dirt, but
the industrial environment in which many lift trucks
operate can contain an extremely high concentration of
abrasive dust, loose fibers, or other contaminants.
Without an air filter (or with an air filter element or hoses
and clamps that are damaged and leaking), engine wear
life can be shortened dramatically. For example, a 1/4
teaspoon of dust per hour can ruin an engine in one, 8-
hour day.
A clogged air filter will cause engine power loss and poor
fuel economy.
It is, therefore, extremely important to properly service
the air cleaner on a regular basis and to maintain the
engine air intake system in a clean, secure condition
(tight connections and good hoses without leaks).
The operating environment dictates the air cleaner
service periods. In extremely dusty or dirty operations,
this may be as often as once or twice daily.
Air Cleaner Maintenance
In general, it is recommended to replace the engine air
filter element every 50 to 250 hours of engine operation,
depending upon the application and operating conditions,
except as noted below.
CAUTION
Be
careful
when
inspecting
or
replacing the air filter element to
prevent loose dirt from entering the
engine air intake housing or hose.
Damage to engine may result.
NOTE
Truck air cleaner should not be
serviced unless the air restriction
indicator shows service is required.
Do not "over- service."
1.
Inspect the air filter element for damage and
contamination
(excessive
dirt
build-up
and
clogging). Replace, as required.
2.
When replacing the air filter element, always
inspect the air intake passages for evidence of
dirt build-up. Clean (wipe out) the housing.
Remove and clean the hose to carburetor air
horn, as necessary.
3.
Check air cleaner mounting and connections.
Be sure the air cleaner hose is securely
connected (not loose or leaking).
F-103
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