SUPPLEMENT FOR UPRATED 3500 ENGINES Caterpillar


Valve Rocker Arms, Lifters, And Bridges

Usage:

(1) Torque for valve adjustment screw locknut ... 70 ± 15 N·m (50 ± 11 lb.ft.)

(2) Clearance for valves:

Intake valves ... 0.38 mm (.015 in.)

Exhaust valves ... 0.76 mm (.030 in.)

(3) Torque for bridge adjustment screw locknut ... 30 ± 4 N·m (22 ± 3 lb.ft.)

(4) Diameter of dowel (new) ... 11.008 ± 0.003 mm (.4334 ± .0001 in.)

Bore in bridge for dowel (new) ... 12.00 ± 0.25 mm (.472 ± .010 in.)

Bore in head for dowel ... 10.968 ± 0.020 mm (.4318 ± .0008 in.)

(5) Diameter of rocker arm shaft ... 37.084 ± 0.013 mm (1.4600 ± .0005 in.)

Bore in bearings for rocker arm shaft ... 37.140 ± 0.015 mm (1.4622 ± .0006 in.)

(6) Height to top of dowel ... 66.5 ± 0.5 mm (2.62 ± .02 in.)

(7) Guide springs must not be used again. Always install new guide springs.

(8) Diameter of valve lifter (new) ... 29.937 ± 0.010 mm (1.1786 ± .0004 in.)

Bore in head for valve lifter ... 30.000 ± 0.025 mm (1.1811 ± .0010 in.)

(9) Torque for rocker shaft mounting bolt ... 109 ± 14 N·m (80 ± 10 lb. ft.)

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