2012/12/21 Caterpillar

Generator Set:

3516B (S/N: ZAP1-UP)

3516C (S/N: SBK1-UP)

Engine:

3516 (S/N: CMD1-UP; PTD1-UP; 4XF1-UP; 9KF1-UP; 4MJ1-UP; 5MJ1-UP; 5SJ1-UP; CAL1-UP; YAL1-UP; ZAL1-UP; ZBL1-UP; 7KM1-UP; GZR1-UP; YAS1-UP; YBS1-UP; 2TS1-UP; 3JS1-UP; 3NS1-UP; 3SS1-UP; 3XS1-UP; RKT1-UP; 8TW1-UP; GZX1-UP; 25Z1-UP; 27Z1-UP; 29Z1-UP; 71Z1-UP; 72Z1-UP; 73Z1-UP)

3516B (S/N: CPA1-UP; GSA1-UP; BMB1-UP; CDE1-UP; TRE1-UP; 9WF1-UP; B5G1-UP; BPJ1-UP; BCK1-UP; LEK1-UP; TAK1-UP; CAN1-UP; CBN1-UP; FDN1-UP; 6HN1-UP; 7RN1-UP; 8CN1-UP; 8KN1-UP; 9AN1-UP; S2P1-UP; YAP1-UP; ZBP1-UP; GAR1-UP; PBR1-UP; PDR1-UP; S2R1-UP; YAR1-UP; ZAR1-UP; ZBR1-UP; GZS1-UP; S2S1-UP; GZT1-UP; S2T1-UP; YAT1-UP; YBT1-UP; S2W1-UP; YAW1-UP; YBW1-UP; 1NW1-UP; 2FW1-UP; 2JW1-UP; 3CW1-UP; 4BW1-UP; 8NW1-UP; FDX1-UP; S2X1-UP; GZY1-UP; S2Y1-UP; S2Z1-UP; 6HZ1-UP; 25Z1-UP)

3516C (S/N: PRC1-UP; SKC1-UP; TTD1-UP; PAF1-UP; PAG1-UP; TTH1-UP; SBJ1-UP; SCJ1-UP; SFJ1-UP; TTJ1-UP; SCK1-UP; SEK1-UP; SFK1-UP; SBM1-UP; TKR1-UP; JTS1-UP; TKS1-UP; TKT1-UP; TKX1-UP; T2X1-UP; TKY1-UP; E3Z1-UP; GS21-UP)

Petroleum Engine:

3516C (S/N: PES1-UP)

Power Module:

PM3516 (S/N: CAC1-UP; BPD1-UP; NAM1-UP; KEN1-UP; NBR1-UP)

PP3516 (S/N: PPS1-UP)

Engine News, SEBD9837, 21 December 2012, "New Sequence for Adjusting the Fuel Injectors in 3516, 3516B, and 3516C Engines". The original article was revised to remove serial number prefixes S/N:8RB
and S/N:6MC
. This article only applies to 3516 Diesel Engines.

Analysis has determined that switching the stroke for adjusting the cylinder numbers 5 and 11 injectors provides optimum contact between the lifter rollers and the base circles on the camshaft.

For the new sequence, the cylinder number 5 injector is adjusted on the compression stroke and the cylinder number 11 injector is adjusted on the exhaust stroke.

Note: There is no need to adjust the injectors in engines that are now in service. There is no evidence of a performance issue with the current adjustment sequence.

Current Adjustment Sequence

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
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
	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

( 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
3516	Compression	1-2-5-6-7-8-13-14	1-2-3-4-5-6-9-10	3-4-9-10-11-12-15-16
	Exhaust	3-4-9-10-11-12-15-16	7-8-11-12-13-14-15-16	1-2-5-6-7-8-13-14

( 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.

New Adjustment Sequence

Table 3

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
3516	Compression	1-2-5-7-8-12-13-14	1-2-3-4-5-6-8-9	3-4-6-9-10-5-15-16
	Exhaust	3-4-6-9-10-11-15-16	7-10-11-12-13-14-15-16	1-2-11-7-8-12-13-14

( 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 4

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
3516	Compression	1-2-5-6-7-8-13-14	1-2-3-4-5-6-9-10	3-4-9-10-5-12-15-16
	Exhaust	3-4-9-10-11-12-15-16	7-8-11-12-13-14-15-16	1-2-11-6-7-8-13-14

( 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.