BODY 1373638 - Caterpillar

Illustration 1 g03141143
Table 1
Specification for 255-8001 Fuel Pump and Valve Mechanism and 417-0080 Fuel Pump and Valve Mechanism
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 injector 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 g03141145
Left side view of engine
Illustration 3 g03141146
Tightening sequence
Table 2
Item Qty Part Specification Description
4 18 304-9553 Stud Use the following procedure in order to tighten the stud for the rocker arm:
Before assembly, apply black 4C-5592 Anti-Seize Compound to the threads and the under head of studs.
Refer Illustration 3 for stud tightening sequence.
1. Tighten the studs in a numerical sequence to 55 5 N m (41 4 lb ft).
2. Retighten the studs in a numerical sequence to 55 5 N m (41 4 lb ft).
3. Again, tighten all the studs to an additional angle in the numerical sequence to 60 5 degrees.