Walker MDD Owner's Manual

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Contents

Maintenance Instructions CLEANING56Donaldson Radialseal™ Air CleanerA remote mounted Donaldson Radialseal™ aircleaner provides the air filtering function. The paperfilter element slides over an outlet tube inside the aircleaner canister with radial sealing action, eliminat-ing the possibility of dust leaks due to improper filterinstallation. Intake design, internal baffling, and aVacuator™ valve provide dust separation and auto-matic precleaning action. Daily or frequent servicingof the air cleaner is not required. Use the air re-striction gauge on the air cleaner outlet to indicatewhen the air filter needs servicing -- a red flag willappear when the filter is overly restricting airflow intothe engine.IMPORTANT: Use only Donaldson air filter ele-ments for replacement (Donaldson P822686 orWalker 5090-1). Aftermarket filters may not sealproperly or filter efficiently.Air Cleaner Components(shown with cover being removed)IMPORTANT: The Donaldson air cleaner uses adry paper-type filter element. NEVER apply oil tothe paper element.Air Restriction Gauge LocationClean and inspect the paper element after every100 hours of service and replace the element year-ly or after six (6) cleanings (or when dirty or dam-aged). More frequent cleaning may be requiredwhen operating in extremely dusty conditions as in-dicated by the air restriction gauge. Service the aircleaner as follows:1. Release the top and bottom cover latches andremove the air cleaner cover. Wash the coverand Vacuator™ valve. Check that these com-ponents are in good condition. The Vacuator™valve is subject to wear and deterioration andshould be replaced yearly or when damaged.The lips of the valve should close and fit togeth-er; any cracks, deformation, or wear in the valveis cause for replacement.2. Remove the filter element by pulling it out of thecanister. There will be some initial resistance asthe filter seal breaks loose and slides off of theoutlet tube. Gently move the end of the filter upand down and side to side or twist to loosen theseal. Use gentle action to minimize the amountof dust dislodged as the filter is removed.3. Clean the filter element using low pressurecompressed air [less than 100 PSI (689 kPa)].Blow out the filter from the interior of the ele-ment while turning the element.NOTE: Washing the element in water or clean-ing solution is not recommended. Replace theelement if it does not clean up with compressedair.CanisterCoverVacuator™ValveCover LatchRadialseal™Filter ElementAir RestrictionGaugePush Button to ResetIndicator After Service