Engine Rebuild Guide, Break-In and Tune-Up 6105 and 6125 Engine Disassembly Sequence The following sequence is suggested when complete engine disassembly for overhaul is required. Refer to the appropriate repair group when removing individual components. NOTE: Remove starter motor and primary fuel filter/water separator before mounting engine onto repair stand. 02 010 8 COOLSCAN is a trademark of Deere & Company. OILSCAN is a registered trademark of Deere & Company. CTM100 (06APR04) 02-010-8 P OWER T ECH 10.5 L & 12.5 L Diesel Engines Continued on next page RG,RG34710,50 –19–21AUG02–1/3 040604 PN=56 ENGINE DISASSEMBLY SEQUENCE Procedure Reference Drain all coolant, fuel and engine oil.
See DISPOSING OF COOLANT in Section 01, Group 002. Perform John Deere COOLSCANand OILSCANanalysis. Dispose of remaining fluids properly. See OILSCAN AND COOLSCAN in Section 01, Group 002. See TESTING DIESEL ENGINE COOLANT in Section 01, Group 002. Remove starter motor. See REMOVE AND INSTALL STARTER MOTOR in Group 100. Remove fuel filter assemblies with mounting bases as required (Delphi/Lucas ECU controlled fuel system). See REPLACING PRIMARY FUEL FILTER/WATER SEPARATOR in CTM115, Section 02, Group 090. See REPLACE FINAL (SECONDARY) FUEL FILTER ELEMENT in CTM115, Section 02, Group 090.
Remove fuel filter assemblies with mounting bases as required (John Deere Level 6 ECU controlled fuel system). See REPLACING PRIMARY FUEL FILTER/WATER SEPARATOR in CTM188, Section 02, Group 090 (dual rail fuel systems). See REPLACE FINAL (SECONDARY) FUEL FILTER ELEMENT in CTM188, Section 02, Group 090 (dual rail fuel systems). See FUEL FILTER/WATER SEPARATOR ASSEMBLY in CTM188, Section 02, Group 091 (single rail fuel systems). Mount engine onto recommended safety approved repair stand. See MOUNT ENGINE ONTO REPAIR STAND in this group. Remove fan, drive belts, and fan drive assembly. See Group 070. Remove alternator. See REMOVE AND INSTALL ALTERNATOR in Group 100. Remove compressor.
See CTM67, OEM Engine Accessories. Remove vibration damper and pulley assembly from crankshaft. See REMOVE CRANKSHAFT VIBRATION DAMPER AND PULLEY in Group 040. Disconnect all air intake/exhaust piping and turbocharger oil inlet/drain lines. Remove turbocharger. See REMOVE TURBOCHARGER in Group 080. Remove exhaust manifold and gaskets. See REMOVE, INSPECT AND INSTALL EXHAUST MANIFOLD in Group 080. Remove oil filter and oil filter housing. See REMOVE OIL FILTER AND VALVE HOUSING/OIL COOLER COVER AND VALVE HOUSING in Group 060. Remove oil cooler assembly. See REMOVE, CLEAN AND INSPECT ENGINE OIL COOLER in Group 060. Remove coolant pump assembly. See REMOVE COOLANT PUMP in Group 070.
Remove water manifold/thermostat housing assembly. See REMOVE AND INSTALL THERMOSTAT HOUSING in Group 070. Remove all six piston spray jets. See REMOVE AND INSTALL PISTON SPRAY JETS in Group 030. (Continued on next page)