SHAFT 8J2173 - Caterpillar

start by:a) remove rocker shaft and push rodsb) remove exhaust manifoldc) remove water temperature regulators1. Remove the air cleaner for the scraper engine. 2. Loosen bolt (1) to remove tension on the vee belts for the tractor engine.3. Loosen the tension on the vee belts for the scraper engine.4. Fasten a hoist to the fan drive. Remove four bolts that hold it to the cylinder head. 5. Install tool (A) on the front of the cylinder head as shown. Fasten the fan drive to tool (A).6. Remove two bolts (3). Disconnect wire (2) for the water temperature sending unit. 7. Disconnect tube (5) from the cylinder head.8. Disconnect ground wire (4) from the cylinder head.9. Disconnect line (6) for the air fuel ratio control from the back of the cylinder head.10. Remove all of the bolts (7) that hold the cylinder head to the cylinder block. 11. Fasten a hoist to cylinder head (8) and remove it from the cylinder block. Weight of the cylinder head is 230 lb. (104.3 kg).12. Remove the old cylinder head gasket.Install Cylinder Head
1. Clean the machined surfaces of the cylinder head and cylinder block that make contact with the cylinder head gasket. 2. Put a new cylinder head gasket in position on the cylinder block. Make sure the holes in the cylinder head gasket are all in alignment with the holes in the cylinder block. Fasten a hoist to cylinder head (1) and put it in position on the cylinder block.3. Install the push rods. Put the rocker shaft in position on the cylinder head.
Make sure the dowels in the rocker shaft assembly are in alignment with the holes in the cylinder head before the bolts are installed and tightened.
4. Put 5P3931 Anti-Seize Compound on the threads of the cylinder head bolts and rocker shaft bolts. Install the bolts and washers and tighten the bolts as follows: a) Tighten all the bolts in number sequence to a torque of 115 lb. ft. (155 N m).b) Tighten all bolts in number sequence to a torque of 175 5 lb. ft. (240 7 N m).c) Tighten all bolts in number sequence (hand turn only) to a torque of 175 5 lb. ft. (240 7 N m). The minimum amount of torque on these bolts after the engine is warm must be 150 lb. ft. (205 N m).d) Tighten all bolts in letter sequence to a torque of 22 lb. ft. (28 N m).e) Tighten all bolts in letter sequence to a torque of 32 5 lb. ft. (43 7 N m).f) Tighten all bolts in letter sequence (hand turn only) to a torque of 32 5 lb. ft. (43 7 N m). The minimum amount of torque on these bolts must be 27 lb. ft. (38 N m) after the engine is warm.5. Make adjustments until the intake valve clearance is .015 in. (0.38 mm) and the exhaust valve clearance is .025 in. (0.64 mm).