Walker MDD (20.9 HP) Owner's Manual

Also see for MDD: Owner's manual Owner's manual

Contents

Maintenance Instructions CLEANING56Turbine PrecleanerThe turbine precleaner is mounted on a remote airintake tube connected to the Donaldson air cleaner.A spinning fan driven by the intake airflow separatesdust from the air, giving the initial stage of air clean-ing. Dust particles are exhausted through a singlesmall vent in the side of the housing. Since no dustis trapped, the precleaner operates without clean-ing. The only maintenance required is to check theoperation of the internal fan every 100 hours. Verifyoperation:1. Look into the exhaust vent while shining a lightinto the intake.2. Start the engine and watch the fan begin to spinas the throttle is advanced.If the fan is not spinning, service or replace the pre-cleaner as required.Donaldson 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:CanisterCoverVacuator™ValveCover LatchRadialseal™Filter ElementAir RestrictionGaugePush Button to ResetIndicator After Service