RING-RETAINING 6V8128 - Caterpillar

Illustration 1 g06253158
Typical example
Table 1
Item Qty Part Specification Description
1 - - Tighten the unit injector rocker arm locknut to 100 10 N m (74 7 lb ft).
2 - - Tighten the valve rocker arm locknut to 30 7 N m (266 62 lb in).
3 1 313-4085 Rocker Shaft Assembly Diameter of a new rocker shaft is 40.000 0.010 mm (1.5748 0.0004 inch).
After installation, bore in the rocker arm bushing for rocker shaft is 40.065 0.015 mm (1.5774 0.0006 inch).
Bore in the valve rocker arm for rocker shaft is 40.065 0.015 mm (1.5774 0.0006 inch).
- - - Inlet valve lash setting is 0.38 0.08 mm (0.015 0.003 inch).
Exhaust valve lash setting is 0.76 0.08 mm (0.030 0.003 inch).
Illustration 2 g06253165
Typical example
Left side view of engine
Illustration 3 g03141256
Typical example
Tightening sequence
Table 2
Item Qty Part Specification Description
4 24 356-5212 Bolt Use the following procedure to tighten the bolts for the rocker arm:
Before assembly, lubricate the threads and shaft to bolt interface with clean engine oil.
1. Tighten the bolts in 2, 3, 1, 4 sequence to 55 5 N m (41 4 lb ft).
2. Retighten the bolts in 2, 3, 1, 4 sequence to 55 5 N m (41 4 lb ft).
3. Again, tighten the bolts in 2, 3, 1, 4 sequence to an additional angle of 60 5 degrees.
Illustration 4 g06248453
437-3877 Rocker Arm
Table 3
Item Qty Part Specification Description
5 1 276-5317 Nut Hold the Arm adjustment screw in position and tighten the nut to 6 3 N.m (53 27 lb in).
6 1 274-4491 Arm Adjustment Screw Free running torque of Arm adjustment screw must not exceed 0.4 N.m (3.5 lb in).
Illustration 5 g06248456
Typical example
489-8223 Rocker Arm
Table 4
Item Qty Part Specification Description
7 1 274-4492 Arm Adjustment Screw Free running torque of Arm adjustment screw must not exceed 0.4 N.m (3.5 lb in).
8 1 196-5070 Jam Nut Hold the Arm adjustment screw in position and tighten the nut to 6 3 N.m (53 27 lb in).