OMRG25204 oem uncert & tier 1.pdf - John Deere Industrial Engines

Lubrication & Maintenance/500 Hour/12 MonthChecking Air Intake SystemIMPORTANT: The air intake system must not leak.Any leak, no matter how small, mayresult in internal engine damage due toabrasive dirt and dust entering theintake system.1. Inspect all intake hoses (piping) for cracks. Replace asnecessary.2. Check clamps (A) on piping which connect the aircleaner, engine and, if present, turbocharger. Tightenclamps as necessary. This will help prevent dirt fromentering the air intake system through looseconnections causing internal engine damage.Check ClampsRG4689 –UN–20DEC883. If engine has a rubber dust unloader valve (B), inspectthe valve on bottom of air cleaner for cracks orplugging. Replace as necessary.IMPORTANT: ALWAYS REPLACE primary air cleanerelement when air restriction indicatorshows a vacuum of 625 mm (25 in.)H 2 O, is torn, or visibly dirty.4. Test air restriction indicator (C) for proper operation.Replace indicator as necessary.IMPORTANT: If not equipped with air restrictionindicator, replace air cleaner elementsat 500 Hours or 12 Months, whicheveroccurs first.Unloader Valve and Air Restriction IndicatorA—ClampsB—Dust Unloader ValveC—Air Restriction IndicatorRG7332B –UN–22JAN99RG,RG34710,5575–19–07JAN02–1/135-2 110306PN=82