3508, 3512 and 3516 Engines Caterpillar

Crankshaft Position for Unit Injector Adjustment and Valve Lash Setting

Usage:

3508 5PW

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Table 1
Standard Rotation (Counterclockwise) As Viewed From Flywheel End
Cylinders To Check/Adjust
Engine	Correct Stroke For No. 1 Piston At Top Center Position ⁽¹⁾	Inlet Valves	Exhaust Valves	Injectors
3508	Compression	1-2-6-8	1-2-3-7	3-4-5-7
3508	Exhaust	3-4-5-7	4-5-6-8	1-2-6-8
3512	Compression	1-3-6-7-10-12	1-4-5-6-9-12	2-4-5-8-9-11
3512	Exhaust	2-4-5-8-9-11	2-3-7-8-10-11	1-3-6-7-10-12
3516	Compression	1-2-5-7-8-12-13-14	1-2-3-4-5-6-8-9	3-4-6-9-10-11-15-16
3516	Exhaust	3-4-6-9-10-11-15-16	7-10-11-12-13-14-15-16	1-2-5-7-8-12-13-14

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Put the No. 1 Piston at the top center (TC) position and identify the correct stroke. Make reference to Testing And Adjusting, "Finding Top Center Position For No 1 Piston". Find the top center position for a particular stroke and make the adjustment for the correct cylinders. Remove the timing bolt. Turn the flywheel by 360 degrees in the direction of normal engine rotation. This will put the No. 1 piston at the top center (TC) position on the other stroke. Install the timing bolt in the flywheel and complete the adjustments for the cylinders that remain.