Service manual

FUEL INJECTION PUMP
Hydraulic Head and Valve(s)
Reassembly
1. Set the camshaft to the correct angle as used
during the gear alignment.
2. Lubricate the distribution shaft.
3. Align the drive lugs on the bottom of the
distribution shaft and install to engage the
distribution shaft coupler.
Note: The flat on the distribution shaft
(Figure 5-70, (1)) should face toward the
engine side of the pump (or away from
the accumulator piston side).
4. Install the distribution shaft plug
(Figure 5-70, (3)) and O-ring (Figure 5-70, (2))
and tighten to 11 ft-lb. (15 N-m).
Install new delivery valve seat seal(s)
(Figure 5-71, (1)).
M01274
Figure 5-71
Assemble and install each delivery valve
(Figure 5-72).Tighten each delivery valve
housing to
30 - 33 ft-lb. (40 - 45 N.m).
Figure 5-70 1. Valve Seat
Note: Some old style hydraulic heads have a
distribution shaft plug with a flat bottom.
The replacement will require a new plug
to allow clearance for the taller
distribution shaft. The parts catalog lists
the new plug with a machined recess on
the bottom.
2. Return Spring
3. Secondary Check Ball Spring Seat
4. Secondary Check Ball
5. Delivery Valve
6. Primary Spring
7. Delivery Valve Housing
Figure 5-72
7. Install the charge pump fuel outlet strainer
gasket
(Figure 5-73, (2)) and tighten the plug
(Figure 5-73, (1)) to
16 - 21 ft-lb. (25 - 29 N.m).
5-32 MP series service Manual VANMAR.