MOTOR GP-PISTON 2478978 - Caterpillar

Table 1
Counterclockwise Rotation (Standard) from the Flywheel End of the Engine
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 2-3-4-7
Exhaust 3-4-5-7 4-5-6-8 1-5-6-8
3512 Compression 1-3-6-7-10-12 1-4-5-6-9-12 2-4-5-8-9-11
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 3-4-5-6-9-10-15-16
Exhaust 3-4-6-9-10-11-15-16 7-10-11-12-13-14-15-16 1-2-7-8-11-12-13-14
(1) Put the No. 1 Piston at the top center (TC) position and identify the correct stroke. Refer to Testing and Adjusting, "Finding the Top Center Position for the 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. Turning the flywheel 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.
Table 2
Clockwise Rotation (Reverse) from the Flywheel End of the Engine
Cylinders To Check/Adjust
Engine Correct Stroke For No. 1 Piston At Top Center Position(1) Inlet Valves Exhaust Valves Injectors
3508 Compression 1-3-4-8 1-2-7-8 2-6-7-8
Exhaust 2-5-6-7 3-4-5-6 1-3-4-5
3512 Compression 1-3-4-6-7-12 1-4-5-8-9-12 2-5-8-9-10-11
Exhaust 2-5-8-9-10-11 2-3-6-7-10-11 1-3-4-6-7-12
3516 Compression 1-2-5-6-7-8-13-14 1-2-3-4-5-6-9-10 3-4-5-9-10-12-15-16
Exhaust 3-4-9-10-11-12-15-16 7-8-11-12-13-14-15-16 1-2-6-7-8-11-13-14
(1) Put the No. 1 Piston at the top center (TC) position and identify the correct stroke. Refer to Testing and Adjusting, "Finding the Top Center Position for the 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. Turning the flywheel 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.