TUBE AS 3029667 - Caterpillar

1. Remove O-ring seal (1) from the rear support bracket. A replacement of the O-ring seal must be made each time the head bolt is removed from the rear support bracket. 2. Remove retainer ring (6), washer (5), spring (4) and washers (3) from each end of the rocker shaft. Make a note of the number of washers (3) used at each end of the shaft. Remove rocker arms (2) from each end of the rocker shaft. All the rocker arms, springs, washers and brackets, except the rear support bracket, can be removed from the shaft. 3. Remove the pin from the rear support bracket with a hammer and punch. Remove rear support bracket (7) from the shaft.4. Remove the plugs from each end of the shaft if necessary.Assemble Rocker Shaft Assembly
1. Install rocker arms (5), brackets (1), washers (4) and springs (2) on the rocker shaft.2. Install rear support bracket (6) on the rocker shaft. Make sure the hole in the rear support bracket is in alignment with the hole in the rocker shaft.3. Put pin (3) in position in the bracket. 4. Install pin (3) through the bracket and shaft with a hammer.5. Pin (3) must extend 9.60 mm (.378 in.) above the bracket. 6. Install O-ring seal (7) in the rear support bracket. Install rocker arm (8), the original number of washers, spring, washer and the retainer ring on the rocker shaft.7. Install the front support, rocker arm, original number of washers, spring, washer and the retainer ring on the rocker shaft.8. Install the plugs in each end of the rocker shaft if they were removed.END BY:a. install rocker shaft assembly and push rods