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Section 04 ENGINE ENGINE LEAK VERIFICATION FLOW CHART PRESSURIZE ENGINE IS ENGINE LEAKING? CHECK ALL JOINTED SURFACES, SCREW/STUD THREADS. MOUNTING FLANGES ETC. ANY LEAK FOUND? CHECK SMALL OIL LINES OF INJECTION PUMP AIR BUBBLES FOUND OR OIL MOVING TOWARD PUMP? REPLACE GASKET OR O-RING, RE-SEAL LEAKING AREA REPLACE INJECTION NIPPLE(S) REMOVE BLEED SCREW ON CYLINDER HEAD ARE ANY AIR BUBBLES IN COOLANT? BLOCK HOSE OF PUMP SHAFT GEAR LUBRICATION SYSTEM IS ENGINE STILL LEAKING? REPLACE O-RING OF CYLINDER HEAD AND/OR CYLINDER BASE GASKET PRESSURIZE PUMP SHAFT GEAR RESERVOIR IN CRANKCASE ARE SEALS LEAKING? CHECK CRANKSHAFT OUTER SEAL OF PTO AND MAG SIDES PRESSURIZE PUMP SHAFT GEAR RESERVOIR IN CRANKCASE IS RESERVOIR LEAKING? UNSEAL PTO CYLINDER AND MAG CYLINDER SEPARATELY IS RESERVOIR LEAKING? IS RESERVOIR LEAKING? CHECK LEAKAGE AT DRAIN HOLE BELOW COOLANT PUMP HOUSING ANY LEAK FOUND? REPLACE DEFECTIVE SEAL(S) REPLACE DEFECTIVE SEAL(S) REPLACE OIL SEAL OF PUMP SHAFT CERAMIC, BESIDE COOLANT SEAL REPLACE DEFECTIVE O-RING REPLACE DEFECTIVE PARTS CHECK OIL PUMP MOUNTING AREA FOR LEAKS IS O-RING LEAKING? CAREFULLY INSPECT ENGINE CASTINGS, PARTICULARLY THE THREAD HOLE AREAS ANY LEAK FOUND? ENGINE IS PERFECTLY SEALED INTERNALLY NO YES YES YES YES NO NO NO YES YES YES NO NO YES NO NO NO NO YES YES YES NO ENGINE LEAK VERIFICATION FLOW CHART A32C1KS YES NO A32C1KS 114 mmr2004-Rev |