SEAL-O-RING 4737961 - Caterpillar

1. Remove breather tube (1) and disconnect wire (2) from sending unit. 2. Loosen four hose clamps and slide hose (4) on tube assembly and disconnect hose from elbow valve (3).3. Disconnect wire (6) from sending unit and remove four bolts and elbow (5) from the water pump. 4. Remove tube assemblies (8) and (9) and disconnect wires from sending unit (7). 5. Disconnect hose (11) from precleaner. Remove precleaner (10) from air cleaner. 6. Disconnect hose assembly (12) from pipe assembly. Remove the bolts that fasten air cleaner (13) to bracket (15) and brace (14). Remove air cleaner (13). 7. Remove bolt (17) that holds clip on tube assembly. Remove tube assembly (16) between the aftercooler and the air fuel ratio control.8. Remove hoses and wiring harnesses that are fastened to the aftercooler. 9. Install a hoist in position on the cylinder head lift brackets.10. Remove head bolts (19), cylinder head (18) and head gasket from the engine block. The weight of the cylinder head assembly is 134 kg (295 lb.).
Do not set the cylinder head on a flat surface because of possible damage to the fuel injection nozzle tips.
11. Remove water seals (21) and O-ring seal (20) from the spacer plate. Remove spacer plate (22).
Do not damage the dowels as the spacer plate is removed.
12. Remove O-ring seal (23) and spacer plate gasket (24) from the cylinder block.