Injection Timing Adjustment

Fig. 26 Dial gauge installation:

Injection timing is checked by determining injection pump plunger movement at piston TDC with a dial gauge, Fig. 26.
1. Check that the drive belt tension is OK. Loosen the setscrew on the cold start cable slip collar. Rotate the collar 1/4 turn so the color slips over the cable stop.
2. Remove hex plug from injection pump cover and install adapter 2066 and suitable dial indicator, Fig. 26. Preload indicator to read approximately 2.5 mm.
3. Rotate engine counterclockwise slowly until gauge needle stops moving, then zero indicator with approx. 1mm preload. Do not rotate engine in opposite direction of normal rotation by turning crankshaft center bolt. Torque setting of bolt may be disturbed, allowing sprocket to loosen.
4. Rotate engine clockwise (normal rotation) slowly until TDC mark on flywheel is aligned with pointer. Dial indicator should read within specification.
a. Non-Turbo:
1. Checking value: 0.80 - 0.90 mm
2. Adjusting value: 0.85 ± 0.02 mm
b. Turbo:
1. Checking value: 0.88 - 0.98 mm
2. Adjusting value: 0.93 ± 0.02 mm
5. If reading is not within specifications, loosen pump mounting bolts and rotate pump until indicator reading is correct.
6. Tighten pump mounting bolts and repeat steps 3 and 4 to check adjustment. Tighten all bolts securely. Pump looseness will cause engine surge and poor performance.
7. With injection pump properly installed and timing within specifications, marks on sprocket, pump and bracket should be aligned with No. 1 cylinder at TDC on compression stroke. If pump position must be altered to reset injection timing, scribe a new mark on pump. Some models have two timing marks on the injection pump sprocket. The mark crossed out with yellow paint should be disregarded.
8. Remove the dial indicator, install the timing check plug with a new gasket, and torque the plug to 11 ft. lbs. (15 Nm). Slide the slip collar back, rotate 1/4 turn and tighten the setscrew.
9. Run the engine and check for leaks. If the timing check plug is leaking, it may be torqued to 18 ft. lbs (25 Nm).