G3306 TRUCK ENGINE Caterpillar


Valve Rocker Arms And Lifters

Usage:

(1) 4B4910 Spring (new):

Length under test force ... 69.85 mm (2.750 in)

Test force ... 62.3 to 71.2 N (14 to 16 lb)

Free length after test ... 101.6 mm (4.00 in)

Outside diameter ... 24.6 mm (.97 in)

(2) 7N0550 Spring washer.

(3) 9M9886 Washer.

(4) Valve lash:

Intake valves ... 0.38 ± 0.08 mm (0.015 ± 0.003 in)

Exhaust valves ... 0.75 ± 0.08 mm (0.030 ± 0.003 in)

(5) Tighten locknut on valve adjustment screw to a torque of ... 29 ± 7 N·m (22 ± 5 lb ft)

(6) Bore in bearing for shaft (new) ... 18.448 ± 0.013 mm (0.7263 ± 0.0005 in)

Diameter of shaft (new) ... 18.71 ± 0.05 mm (0.737 ± 0.002 in)

Maximum permissible clearance between bearing and shaft (worn) ... 0.20 mm (.008 in)

(7) Diameter of valve lifter (new) ... 33.287 ± 0.013 mm (1.3105 ± .0005 in)

Bore in block for valve lifter (new) ... 33.388 ± 0.050 mm (1.3145 ± .0020 in)

Maximum permissible clearance between lifter and bore for valve lifter (worn) ... 0.30 mm (.012 in)

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