3306C Truck Engine Caterpillar

Illustration 1	g00342692

(1) 4B-4910 Spring (new spring)

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

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

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

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

(2) 7N-0550 Spring Washer

(3) 9M-9886 Washer

(4) Valve lash

Inlet valves ... 0.38 ± 0.08 mm (.015 ± .003 inch)

Exhaust valves ... 0.64 ± 0.08 mm (.025 ± .003 inch)

(5) Torque for the locknut on the valve adjustment screw ... 29 ± 7 N·m (22 ± 5 lb ft)

(6) Bore in the bearing for the new shaft ... 18.448 ± 0.013 mm (.7263 ± .0005 inch)

Diameter of the new shaft ... 18.402 ± 0.013 mm (.7245 ± .0005 inch)

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

(7) Diameter of the new valve lifter ... 33.285 ± 0.015 mm (1.3105 ± .0005 inch)

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

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