Walker H27i Operator's Manual

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54Maintenance Instructions CLEANINGIMPORTANT: Use only Cummins/Fleetguard airfilter elements for replacement (Walker 20901 and20903). Aftermarket filters may not seal properly orfilter efficiently.CanisterPrimaryFilter ElementAir Cleaner Components(Shown with Cover Being Removed)IMPORTANT: The Cummins/Fleetguard air cleaneruses a dry papertype air filter element. NEVERapply oil to the paper element.Push Button to ResetIndicator After ServiceAir FilterRestriction GaugeAir Filter Restriction Gauge LocationInspect the primary filter element after every 100hours of service and replace the element and safety filter yearly (or when dirty or damaged). Morefrequent replacement may be required when operating in extremely dusty conditions as indicated by theair filter restriction gauge. Service the air cleaner asfollows:1. Lift Mono Latch Twist Lock™ and twist theOptiAir™ cover to the left into the “open” position to remove the air cleaner cover. Wash thecover and dust ejection valve. Check that thesecomponents are in good condition. The dustejection valve is subject to wear and deterioration and should be replaced yearly or whendamaged. The lips of the valve should close andfit together; any cracks, deformation, or wear inthe valve is cause for replacement.2. Remove the primary filter element by pulling itout of the canister. There will be some initialresistance as the filter seal breaks loose andslides off of the outlet tube. Gently move theend of the filter up and down and side to side ortwist to loosen the seal. Use gentle action tominimize the amount of dust dislodged as thefilter is removed.3. Discard the filter element if excessive air flowrestriction has been indicated by the air filterrestriction gauge and proceed to Step 6. Cleanthe filter element by gently tapping on a flat,hard surface. If excessive restriction still existsafter cleaning the element, it should be replaced.NOTE: Use care when cleaning the filter element. The filter element and/or seal surfacemay be damaged by tapping too hard or hittingon an uneven surface or sharp edge. Washingthe element in water or cleaning solution is notrecommended. Do not try to clean the elementwith compressed air. Remember, replacing afilter is less expensive than replacing a dustedengine.4. Use a bright light inside the filter to inspect fordamage. Check the element very carefully forpin holes or other damage that will allow dirtto leak through the paper media. Replace filterif necessary.5. Check the condition and resilience of the radialsealing surface (inside of the open end) of thefilter. Replace the filter if any cracks, tears, orother damage to the sealing surface are noted.6. Without removing, visually inspect the conditionof the safety filter for damage or holes. Thesafety filter should only be removed for replace-ment YEARLY (or when dirty or damaged).