3126 Truck Engine Caterpillar


Valve Rocker Arms and Lifters

Usage:

3126 1BW



Illustration 1g00438570



Illustration 2g00438574

View A-A

(1) Valve rocker arm assembly

Bore in the rocker arm for the shaft ( new) ... 24.808 ± .020 mm (0.9767 ± 0.0008 inch)
Diameter of the rocker arm shaft ( new) ... 24.755 ± .010 mm (0.9746 ± 0.0004 inch)

(2) Tighten the locknut to the following torque. ... 30 ± 7 N·m (22 ± 5 lb ft)

(3) Valve lash

Inlet valves ... 0.38 mm (0.015 inch)
Exhaust valves ... 0.64 mm (0.025 inch)

(4) Lifter assembly

Bore in the lifter arm for the shaft ( new) ... 15.670 ± 0.012 mm (0.6169 ± 0.0005 inch)
Diameter of shaft ( new) ... 15.620 ± 0.018 mm (0.6150 ± 0.0007 inch)

(5) Apply 9S-3263 Thread Lock Compound. Tighten the bolts that are shown above in a numerical sequence to the following torque. ... 13 ± 3 N·m (10 ± 2 lb ft)

(6) The lifter group must be installed with the oil holes in the shaft. The installation procedure is shown in illustration 2.

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