Walker H27i - Page 58

54
Maintenance Instructions CLEANING
IMPORTANT: Use only Cummins/Fleetguard air
lter elements for replacement (Walker 20901 and
20903). Aftermarket lters may not seal properly or
lter e󰀩ciently.
Canister
Primary
Filter Element
Air Cleaner Components
(Shown with Cover Being Removed)
IMPORTANT: The Cummins/Fleetguard air cleaner
uses a dry papertype air lter element. NEVER
apply oil to the paper element.
Push Button to Reset
Indicator After Service
Air Filter
Restriction Gauge
Air Filter Restriction Gauge Location
Inspect the primary lter element after every 100
hours of service and replace the element and safe
ty lter yearly (or when dirty or damaged). More
frequent replacement may be required when operat
ing in extremely dusty conditions as indicated by the
air lter restriction gauge. Service the air cleaner as
follows:
1. Lift Mono Latch Twist Lock™ and twist the
OptiAir™ cover to the left into the “open” posi
tion to remove the air cleaner cover. Wash the
cover and dust ejection valve. Check that these
components are in good condition. The dust
ejection valve is subject to wear and deteriora
tion and should be replaced yearly or when
damaged. The lips of the valve should close and
t together; any cracks, deformation, or wear in
the valve is cause for replacement.
2. Remove the primary lter element by pulling it
out of the canister. There will be some initial
resistance as the lter seal breaks loose and
slides o󰀨 of the outlet tube. Gently move the
end of the lter 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
lter is removed.
3. Discard the lter element if excessive air ow
restriction has been indicated by the air lter
restriction gauge and proceed to Step 6. Clean
the lter element by gently tapping on a at,
hard surface. If excessive restriction still exists
after cleaning the element, it should be re
placed.
NOTE: Use care when cleaning the lter ele
ment. The lter 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
lter is less expensive than replacing a dusted
engine.
4. Use a bright light inside the lter 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 lter
if necessary.
5. Check the condition and resilience of the radial
sealing surface (inside of the open end) of the
lter. Replace the lter if any cracks, tears, or
other damage to the sealing surface are noted.
6. Without removing, visually inspect the condition
of the safety lter for damage or holes. The
safety lter should only be removed for replace-
ment YEARLY (or when dirty or damaged).