Injection Pump Timing

NOTE: Before starting timing procedure, check valve timing and drive belt tension.

Set crankshaft to TDC on No. 1 cylinder and align marks on flywheel and clutch housing. Check marks on injection pump sprocket and mounting plate.
If timing adjustment is necessary, remove plug from injection pump cover and install adapter and dial indicator in place of plug. Loosen cold start device cable by loosening screw No. 1 and turning clamp 90°. See Fig 1 .

Fig 1: Loosening Cold Start Device Screw No. 1

CAUTION: Do not loosen screw No. 2 or pump recalibration will be necessary.
Preload dial indicator (2066) to .097" (2.5 mm). See Fig 2 . Slowly turn engine counterclockwise until dial indicator needle stops moving. Zero indicator.

Fig 2: Adjusting Injection Pump Timing

Turn engine clockwise until TDC mark on flywheel lines up with reference mark. Check dial indicator reading. See Injection Pump Timing Specifications table.

INJECTION PUMP TIMING SPECIFICATIONS

Application		In. (mm)
4000
Check Specification		.035-.037 (.88-.93)
Adjusting Specification		.033-.035 (.84-.88)
5000
Check Specification		.035-.039 (.88-.98)
Adjusting Specification		.036-.037 (.91-.95)

If necessary, loosen bolts on mounting plate and support. Turn pump to adjust timing and tighten bolts. Recheck dial indicator readings. Turn clamp on cold start device back 90° to original position and tighten screw No. 1.