HARNESS AS-FRONT 4804910 - Caterpillar

Removal Procedure
Start By:
Disconnect the electrical connections at the battery.
Drain the coolant system. If the engine uses Diesel Engine Antifreeze/Coolant (DEAC), refer to Operation and Maintenance Manual, "Cooling System Coolant (DEAC) - Change". If the engine uses Extended Life Coolant (ELC), refer to Operation and Maintenance Manual, "Cooling System Coolant (ELC) - Change".
Remove the turbocharger, if equipped. Refer to Disassembly and Assembly, "Turbocharger - Remove".
Remove the exhaust manifold. Refer to Disassembly and Assembly, "Exhaust Manifold - Remove and Install".
Remove the fuel injection lines. Refer to Disassembly and Assembly, "Fuel Injection Lines - Remove and Install".
Remove the fuel injection nozzles. Refer to Disassembly and Assembly, "Fuel Injection Nozzles - Remove".
Remove the fuel filter base. Refer to Disassembly and Assembly, "Fuel Filter Base - Remove".
Remove the expansion tank. Refer to Disassembly and Assembly, "Expansion Tank - Remove and Install".
Remove the engine crankcase breather. Refer to Disassembly and Assembly, "Crankcase Breather - Remove and Install".
Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".
Remove the rocker shaft assembly and the pushrods. Refer to Disassembly and Assembly, "Rocker Arm and Shaft - Remove".
Illustration 1 g00550160
Typical example
Illustration 2 g00550162
Gradually loosen 22 cylinder head bolts (1) in the reverse order that is shown in Illustration 2. This will help prevent distortion of the cylinder head.
Illustration 3 g00550163
Typical example
Attach a suitable lifting device to cylinder head (2). Carefully lift cylinder head (2) off the engine block. The weight of the cylinder head is 41 kg (90 lb).
Place the cylinder head on a surface that will not scratch the face of the cylinder head.
Illustration 4 g00550165
Remove cylinder head gasket (3) .
Note the location of dowels (4) on each end of the cylinder block. Dowels (4) hold cylinder head gasket (3) in place while cylinder head (2) is installed.
Illustration 5 g00741112
Align straight edge (7) with bolt (6) in order to check for distortion. If there is a visible reduction in the diameter of thread (8) that has not been in engagement with the cylinder block, the bolts must be replaced.