TP-6137 5/03 25Section 5 Fuel System
5.7 Fuel Pump Adjustment Timing
To obtain the correct adjustment timing of the fuel pump,
use a ruler and measure the distance between the mark
on the flywheel and the mark on the crankcase when the
plunger is in the fuel starting delivery point. See
Figure 5-12.
Acceptable values are between
40±2 mm (1.5748±0.0394 in.) for 3000 RPM units and
50±1 mm (1.968±0.0394 in.) for 3600 RPM unit.
If this value is not obtained, readjust the fuel starting
delivery point by adding or removing shims between the
pump and the gear cover’s s urface.
Every thickness of ±1/10 mm (0.0040 in.) under the
injection pump increases or decreases the distance
between the marks on the flywheel and crankcase by
±2mm(±0.78 in.).
Adding or removing shims between the gear cover and
the fuel pump’s body decreases or increases the
distance between the fuel pump flange and the cam of
the camshaft. Adjust the starting delivery point so that
its value is within the above mentioned value.
Figure 5-12 Flywheel Mark
5.8 Fuel Pump and Gear Cover
Installation
1. If replacing one of these parts, check the distance
between the fuel pump surface on the gear cover
and the roller tappet cam follower edge.
2. Measure the distance between the parts and add
the shim thickness. Total distance should be
between 57.5--59.1 mm (2.263--2.327 in.). See
Figure 5-13.
Figure 5-13 Acceptable Distance
Note: The thickness of the fitted shims under the
injection pump is stamped on the front surface of
the pump in 1/10 mm (0.004 in.) (e.g. 15 indicates
1.5 mm (0.0600 in.) thickness).
Note: The value stamped on the pump is for factory
installed fuel pumps. Fuel pump or injection
timing modifications alter the thickness values.
Figure 5-14 Stamp
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