(20) Place pump in horizontal position with control
unit bore (36 ) facing up.
(21 ) Center the plunger sleeve (34) in the control
unit bore (36 ). Position plunger sleeve pin (5) so that
the flats align with the groove in the control sleeve (34)
and the electric pencil mark (dot ) faces the top of the
(22 ) Insert control unit assembly (4) into housing
(6), pressing gently until control unit seats.
Do not use force. If flange is not seated on
pump housing, rotate arm both ways with
finger pressure pushing control unit in.
Rotate the control unit lever through a 360°
arc to make certain that the control unit as-
sembly is correctly installed. Failure to ro-
tate 360 indicates that the plunger sleeve pin
(5) is not engaging the plunger sleeve slot.
(23) Install control unit assembly retaining plate,
as shown in figure 7-39 using two tab washers and two
screws. Torque screws to 20-25 inch-pounds and bend
locking tabs over screws.
If control unit will not seat, pull it out and re-
peat steps (20) through (22 ).
Figure 7-40. Checking Plunger Sleeve Alignment
Figure 7-41. Pressure Testing Injection Pump
(1) Turn pump upside down and depress tappet
with thumb. Tappet should recede 1/16 into face gear
(figure 7-40). If tappet cannot be depressed 1/16 into
face gear, plunger sleeve pin (5, figure 7-34 ) is improp-
erly aligned. Disassembly pump and re-align pin.
(2) Remove the overflow valve assembly from the
fuel outlet hole in the pump housing. Install a 1/4 pipe
plug into the fuel outlet hole.
(3) Secure the pump close to a Nozzle Test Stand.
(4) Cap outlet ports (see figure 7-41 ).
(5) Install C-clamp on injection pumps as shown
in figure 7-41 to retain face gear.
(6) Align holes in face gear and housing (see fig-
(7) Connect the Nozzle Test Stand to the fuel in-
let hole in the pump housing.