INSERT-PIN 3987542 - Caterpillar

1. Remove the bolts, locks, and washers (2) from each end of the rocker shaft.2. Remove rocker arms (1) and washers (3) from the shaft.3. Remove the screws and nuts from rocker arms.Assemble Rocker Shafts
1. Make sure the oil holes in the rocker arms, rocker shaft, and bracket are clean and free of all dirt and foreign material.2. Measure the bore of the bushing in each of the rocker arms. The bore must be .8603 .0008 in. (21.852 0.020 mm). The maximum permissible bore is .8630 in. (21.920 mm). Make a replacement of the arm and bushing as a unit if the bore is not correct. The arms and bushings can not be ordered separately.3. Measure the diameter of the shaft at each of the rocker arm locations. The diameter must be .8580 to .8588 in. (21.793 to 21.814 mm). The minimum permissible diameter is .8570 in. (21.768 mm). 4. Install screws (3) into rocker arms (4). Turn the screws until they are .44 in. (11.2 mm) below the bottom of the rocker arms.5. Install the rocker arms and washers (2) on the shaft as shown.6. Put the shaft and rocker arms in position on bracket (1) with screws (3) on the same side as the oil hole on the bottom of the bracket. 7. Make sure the flat surfaces (5) on the shaft (6) are turned up. Install the washers, locks, and bolts. Tighten the bolts to a torque of 18 5 lb. ft. (24.4 6.8 N m). end by: a) install rocker shafts and push rods