Walker H27i Operator's Manual

Also see for H27i: Operator's manual Operator's manual

53Maintenance Instructions CLEANINGCLEANINGCAUTIONIf a pressure washer is used on the ex-posed working parts, avoid water on theelectrical parts and the engine coolingsystem.Engine Air Cleaner SystemThere are two main components in the engine aircleaner system: a turbine precleaner and a Cummins/Fleetguard OptiAir™ air cleaner. Each component is checked, cleaned and maintained on a different schedule based on the filtering action required.Each component is serviced as follows:Turbine PrecleanerThe turbine precleaner is mounted on the Cummins/Fleetguard air cleaner. A spinning fan driven by theintake airflow separates dust from the air, giving theinitial stage of air cleaning. Dust particles are exhausted through a single small vent in the side of thehousing. Since no dust is trapped, the precleaneroperates without cleaning.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 precleaner as required.Cummins/Fleetguard OptiAir™ Air CleanerA remote mounted Cummins/Fleetguard OptiAir™air cleaner provides the air filtering function. Theprimary filter element slides over an outlet tubeinside the air cleaner canister with radial sealingaction, reducing the possibility of dust leaks due toimproper filter installation. Intake design, internalbaffling, and a dust ejection valve provide dustseparation and automatic precleaning action. Dailyor frequent servicing of the air cleaner is notrequired. Use the air filter restriction gauge on theair cleaner outlet to indicate when the air filter needsservicing–a yellow indicator will show when the filteris overly restricting airflow into the engine.Engine Air Cleaner System Components8600-12HoseClampDust EjectionValvePrimary FilterElementSafetyFilterMountingBandCummins/FleetguardAir CleanerCummins/FleetguardAir Cleaner CoverAir IntakeHoseEngineHoseClampHoseClampTurbinePrecleanerAir FilterRestriction Gauge