POWERTECH™ 2.9 L OEM Diesel Engines - John Deere Industrial ...

Lubrication&Maintenance/2000 Hour/24 MonthChecking And Adjusting Engine ValveClearanceCAUTION: To prevent accidental starting ofengine while performing valve adjustments,always disconnect NEGATIVE (–) batteryterminal.IMPORTANT: Engine valve clearance MUST BEchecked and adjusted with engineCOLD.1. Remove rocker arm cover and crankcase ventilatortube.Checking Valve ClearanceT81224 –UN–07NOV88IMPORTANT: Visually inspect contact surfaces ofwear caps and rocker arm wear pads.Check all parts for excessive wear,breakage, or cracks. Replace parts thatshow visible damage.Rocker arms with excessive valveclearance should be inspected morethoroughly to identify damaged parts.2. Using JDE83 or JDG820 Flywheel Turning Tool, rotateengine flywheel in running direction (clockwise viewedfrom front of engine) until JDG1571 (or JDE81-4)timing pin goes into flywheel hole. Check if Number 1is at compression stroke (B). (No. 1 rocker armsshould be loose.) If not, rotate engine one fullrevolution (360°) until timing pin goes into flywheelhole.Valve Adjusting OrderA—Front of EngineB—Number 1Piston at TDC Compression StrokeC—Number 1 Piston at TDC Exhaust StrokeE—Exhaust ValveI—Intake ValveRG4775 –UN–06DEC88NOTE: Firing order is 1-2-3.3. Check and adjust valve clearance using a feeler gaugeon No. 1 and 2 exhaust valves and No. 1 and 3 intakevalves.SpecificationValve Clearance (Engine Cold)—Specification—Intake..................................................Exhaust.......................................................................0.35 mm (0.014 in.)0.45 mm (0.018 in.)Continued on next pageRG,RG34710,5067–19–18FEB03–1/240-2 060106PN=99