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

Lubrication & Maintenance/500 Hour/12 MonthPressure Testing Cooling SystemTest Radiator CapRG6557 –UN–20JAN93Test Cooling SystemRG6558 –UN–20JAN93CAUTION: Explosive release of fluids frompressurized cooling system can causeserious burns.Shut off engine. Only remove filler cap whencool enough to touch with bare hands.Slowly loosen cap to first stop to relievepressure before removing completely.Test Radiator Cap1. Remove radiator cap and attach to D05104STTester as shown.2. Pressurize cap to specification listed. Gauge shouldhold pressure for 10 seconds within the normalrange if cap is acceptable.If gauge does not hold pressure, replace radiatorcap.SpecificationRadiator Cap Holding Pressure(Not Opening For 10Seconds)—Pressure....................................70 kPa (0.7 bar) (10 psi)minimum1. Allow engine to cool, then carefully remove radiatorcap.2. Fill radiator with coolant to the normal operatinglevel.IMPORTANT: DO NOT apply excessive pressure tocooling system, doing so maydamage radiator and hoses.3. Connect gauge and adapter to radiator filler neck.Pressurize cooling system to specification listed forradiator cap.4. With pressure applied, check all cooling systemhose connections, radiator, and overall engine forleaks.If leakage is detected, correct as necessary andpressure test system again.If no leakage is detected, but the gauge indicated adrop in pressure, coolant may be leaking internallywithin the system or at the block-to-head gasket.Have your engine distributor or servicing dealercorrect this problem immediately.3. Remove the cap from gauge, turn it 180°, andretest cap. This will verify that the firstmeasurement was accurate.Test Cooling SystemNOTE: Engine should be warmed up to test overallcooling system.RG,RG34710,5586–19–07JAN02–1/135-13 110306PN=93