A Series Diesel Engine Fuel System 77
Injection Pump Timing
Pump to engine timing is extremely critical. Pump timing that is off by only a few crankshaft degrees will cause:
1. Poor performance – starting and power
2. Excessive smoke and emission
3. Poor fuel economy
Engine pump timing begins with the timing of the
injection pump drive gear to the camshaft gear.
The first step is the location of TDC for cylinder
Number 1.
After installing each gear, make sure that aligning
marks A, B and C of the idle gear are aligned with
those of the fuel injection pump drive gear, cam shaft
gear and crank shaft gear.
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