TIRE 0093507 - Caterpillar

1. Remove four bolts (1) and the washers from the rocker shaft assembly.2. Remove rocker shaft assembly (3) from the cylinder head assembly.3. Remove push rods (2) from the engine. Put identification marks on the push rods as to their location in the engine.Install Rocker Shaft Assembly And Push Rods
1. Install push rods (4) in their original location in the cylinder block, and in the valve lifters.
Loosen adjusting screws (2) used to set the valve clearance. This will prevent a bent valve or push rod during installation.
Make sure the O-ring seal in the rear rocker arm support bracket is not damaged when the rear bolt is installed in the support bracket.2. Install a new O-ring seal in the rear rocker arm support bracket. Put 2P2506 Thread Lubricant on all of the bolts that hold the rocker shaft assembly in position except for the bolt that goes through the rear rocker arm support bracket.3. Put rocker shaft assembly (3) in position on the engine. Make sure the dowels located in the support brackets are in alignment with the dowel holes in the cylinder head assembly. Make sure the rocker arms are engaged with the push rods.4. Install four bolts (1) and washers that hold the rocker shaft assembly in position, and tighten them until they are finger tight. 5. Tighten the bolts that hold the rocker shaft assembly as follows:a. Tighten the bolts in number sequence to a torque of 155 N m (115 lb. ft.).b. Tighten the bolts in number sequence to a torque of 250 17 N m (185 13 lb. ft.).c. Tighten the bolts in number sequence to a torque (hand torque only) to 250 17 N m (185 13 lb. ft.) 6. The assembled length of springs (5) at both ends of the rocker shaft assembly must be 1.50 0.25 mm (.059 .010 in.). Remove or install the washers behind the springs to obtain the correct assembled length of the springs.7. Make an adjustment to the valves until the intake valve clearance is 0.38 mm (.015 in.) and the exhaust valve clearance is 0.64 mm (.025 in.). Tighten the nuts on adjustment screws (2) to a torque of 29 7 N m (21 5 lb. ft.). For the complete valve adjustment procedure, see Valve Clearance in Testing And Adjusting.END BY:a. install valve cover