Walker H24d Operator's Manual page 59

Maintenance Instructions
Cover
Dust Ejection
Valve
Cover Latch
Air Cleaner Components
(Shown with Cover Being Removed)
IMPORTANT: The Donaldson
paper­type air filter element. NEVER apply oil to the
paper element.
Air Filter
Restriction Gauge
Air Filter Restriction Gauge Location
Inspect the filter element after every 100 hours of
service and replace the element and safety filter
yearly (or when dirty or damaged). More frequent
replacement may be required when operating in ex­
tremely dusty conditions as indicated by the air filter
restriction gauge. Service the air cleaner as fol­
lows:
1. Release the top and bottom cover latches and
remove the air cleaner cover. Wash the cover
and dust ejection valve. Check that these com­
ponents are in good condition. The dust ejec­
tion valve is subject to wear and deterioration
and should be inspected carefully and replaced
every two years or when damaged. The lips of
the valve should close and fit together; any
cracks, deformation, or wear in the valve is
cause for replacement.
Canister
Primary Filter
Element
air cleaner uses a dry
®
Push Button to Reset
Indicator After Service
2. Remove the 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 re­
moved.
3. Discard the filter element if excessive air flow
restriction has been indicated by the air filter
restriction gauge and proceed to Step 6. Clean
the filter element by gently tapping on a flat,
hard surface. If excessive restriction still exists
after cleaning the element, it should be re­
placed.
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 filter element to in­
spect for damage. Check the element very
carefully for pin holes or other damage that
will allow dirt to leak through the paper media.
Replace filter element if dirty or damaged.
5. Check the condition and resilience of the radial
sealing surface (inside of the open end) of the
filter. Replace the filter if any cracks, tears, or
other damage to the sealing surface are noted.
6. Without removing, visually inspect the condition
of the safety filter for damage or holes. The
safety filter should only be removed for replace-
ment YEARLY (or when dirty or damaged).
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 pre­
mature engine wear.
7. After removing the safety filter, use a clean,
damp cloth and wipe the interior of the air clean­
er 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.
CLEANING
55