3. Clean the element as outlined in ELEMENT
on the outlet side of the air cleaner by means of a
CLEANING. Replace the element after six cleanings or
flexible hose. The other end is left open to the
annually, whichever comes first.
4. Inspect all parts of the intake system and air
Maximum restriction in the air cleaner occurs at
maximum air flow. On a naturally aspirated or
supercharged (not turbocharged) diesel, the maximum
air flow occurs at maximum (high idle) speed without
5. Install the cleaned or new element into the air
regard for engine power. On a gasoline, LP, or turbo-
cleaner body, securing it with the washer and thumb-
charged diesel engine, the maximum air flow occurs
only at maximum engine power.
6. Ensure the O-ring around the air cleaner body is in
With the manometer held vertically and the engine
place and not damaged.
drawing maximum air, the difference in the height of
the water columns in the two legs, measured in inches
7. Install the baffle on the air cleaner body with the two
or centimeters is the air cleaner restriction. Restriction
arrows pointing up. Secure with the clamp band and
indicators are generally marked with the restriction at
tighten the hex head bolt.
which the red signal flag locks up.
If the initial restriction on a new or clean filter reads
above the maximum allowed for the engine, check the
Washing in a water-detergent solution or blowing out
with compressed air are two accepted methods for
cleaning the element of the air cleaners. If the elements
1. Ensure the air cleaner inlet is not plugged.
contain substantial amounts of soot or oil fumes,
washing in water works better than compressed air. If
2. Inspect the air cleaner outlet to be sure it is not
the contaminant is found to be mostly loose dust, either
plugged by paper, rags, etc.
method works equally well.
3. Ensure the correct size connections are used
If cleaned with compressed air, elements can be put
between the air cleaner and the engine.
back into service immediately; however, if cleaned by
washing, elements must be dried before returning them
4. Ensure all inlet accessories are the correct size
and are not plugged by any foreign object.
FILTER ELEMENT REPLACEMENT.
Some elements are partially covered by a
plastic sleeve with fins. The covered por-
tion can be cleaned with water or air
without removing the sleeve. Use a stiff
Never service the air cleaner while the
fiber (not wire) brush to remove oil and
engine is running.
grease deposits from the sleeve and fins.
Never remove the sleeve and fins from the
1. Loosen the hex head bolt on the clamp band and
remove the clamp band and baffle.
2. Remove the thumbscrew and
withdraw the element.