Walker H38i Operator's Manual page 57

Maintenance Instructions
Inspect the primary filter element after every 100
hours of service and replace the element and safe­
ty filter yearly (or when dirty or damaged). More
frequent replacement may be required when operat­
ing in extremely dusty conditions. Service the air
cleaner as follows:
1. Release the top and bottom cover latches and
remove the air cleaner cover. Wash the cover.
Check that the cover is in good condition.
2. Remove the primary filter element by pulling it
out of the canister. There will be some initial
resistance as the filter seal breaks loose and
slides off of the outlet tube. Gently move the
end of the filter up and down and side to side or
twist to loosen the seal. Use gentle action to
minimize the amount of dust dislodged as the
filter is removed.
3. Clean the filter element by GENTLY tapping on
a FLAT, HARD surface.
NOTE: Use care when cleaning the filter ele­
ment. The filter element and/or seal surface
may be damaged by tapping too hard or hitting
on an uneven surface or sharp edge. Washing
the element in water or cleaning solution is not
recommended. Do not try to clean the element
with compressed air. Remember replacing a
filter is less expensive than replacing a dusted
engine.
4. Use a bright light inside the primary filter element
to inspect for damage. Check the element very
carefully for pin holes or other damage that
will allow dirt to leak through the paper media.
Replace element if necessary.
5. Check the condition and resilience of the radial
sealing surface (inside of the open end) of the
primary filter element. Replace the filter if any
cracks, tears, or other damage to the sealing
surface are noted.
6. Without removing, visually inspect the condi­
tion of the safety filter for damage or holes.
The safety filter should only be removed for re-
placement YEARLY (or when dirty or dam­
aged).
IMPORTANT: Prior to removing the safety filter,
make sure the inside surface of the air cleaner
canister is clean. This will minimize the risk of
dirt entering the outlet tube which can cause
premature engine wear.
7. After removing the safety filter, use a clean,
damp cloth and wipe the interior of the air cleaner
canister clean. Use special care to clean both
the inside and outside surfaces of the outlet
tube.
IMPORTANT: Any dust left on the inside of the
outlet tube will go into the engine and cause wear.
8. Check the outside surface of the outlet tube for
smoothness and cleanness (this is the sealing
surface).
9. Insert and seat the safety filter and primary filter
el ement carefully into the canister, applying
pres sure at the outer rim of the filter; not at the
flexible center. Make sure the filter element is
completely in place before installing the cover.
NOTE: DO NOT use petroleum based lubri­
cants on the sealing surfaces of the filter ele­
ments; use tal cum powder or dry silicone lubri­
cants if required for filter installation.
Outlet Tube Safety Filter
Canister
Air Filter Element Replacement
10. Install the cover with the word "Kohler" properly
oriented. Latch the air cleaner cover to the can­
ister. Make sure both the top and bottom cover
latches are securing the cover in place.
11. Release the top and bottom cover latches of the
intake cover. Wash the cover and check and
clean the inlet screen. Reinstall the cover.
CLEANING
Primary
Filter Element
Radial Sealing
Surface
53