assembly in the housing (32, fig.
verse order of the numerical
sequence as illustrated on figure 17E.
(7)
Reassemble the housing assembly
Note.
When reassembling the
and the throttle shaft and lever
injection
pump
and
governor
assembly in the reverse of the
assembly, assemble the rotor,
numerical sequence as illustrated on
plungers, cam roller shoes, rollers,
figure 17B and C.
and the hydraulic head under clean
(8)
Place the lever assembly (9, fig. 17B)
fuel oil to prevent any foreign matter
in the "run" position, and check the
from entering the pump.
clearance between the shutoff cam
Caution: Replace all gaskets in the
(8) and the vertical tab on the
fuel injection pump and governor
governor hook assembly (7, fig. 17C).
assembly
whenever
they
are
Correct clearance is 0.031 0.006 in.
disturbed. Do not overtorque the
(9)
Reassemble the cover assembly in
head locking and high pressure fuel
reverse order of the numerical
line screws; overtorquing the fuel
sequence as illustrated on figure 17A.
line screws will crush the copper
b.
Testing and Calibration.
gaskets allowing the screws to
bottom.
Overtorquing the head
(1)
Mount the fuel injection pump and
locking screws will cause rotor
governor assembly on a pump test
seizure and ultimately result in drive
stand.
shaft failure. Refer to tabulated data,
(2)
Provide for a 1-to-1 drive ratio.
paragraph 4 for proper torque.
(3)
Drive the fuel injection pump and
(2)
Apply air pressure (30 to 100 psi) to
governor assembly as 1,400 rpm and
any head outlet, and rotate the rotor in
test the transfer pump pressure
the head until air pressure forces the
(metering portion).
The correct
rollers to their extreme outward limit.
pressure is 62 to 67 psi.
Using a micrometer measure the
(4)
The electrical solenoid may be tested
dimension from the outside of one
for continuity and shorts by the use of
roller to the outside of the other. This
a multimeter set on the ohms scale.
must be 2.005 0.0005 inch. Set this
adjustment by turning the screw (25,
(5)
Measure the fuel delivery for each
fig. 17E) clockwise to increase and
cylinder. The correct delivery is 166
counterclockwise to decrease plunger
to 171 cubic millimeters. Turn the
travel.
torque adjusting screw (21, fig. 17C)
clockwise
to
decrease
and
(3)
Install the packing (23) and the
counterclockwise to increase fuel
hydraulic cam ring (22) on the
delivery.
hydraulic head (30).
The etched
arrow indicating proper direction of
(6)
Install a sealing wire through the
travel must face outward.
torque screw and head locking screw.
(4)
Install the retainer assembly (21) on
c.
Installation and Timing.
the rotor (24). Line up the assembly
Warning: Under no circumstances
marks on the retainer assembly and
should
the
Roosa-Master
fuel
the rotor and install the retaining ring
injection pump be timed while the
(20).
engine it ruining.
(5)
Reassemble the remaining items in
(1)
Remove the timing hole cover from
reverse order of the numerical
the flywheel housing.
sequence as illustrated on figure 17E.
(2)
Turn the engine clockwise until No. 1
(6)
Reassemble the end plate assembly
piston is on the compression stroke
in reverse order of the numerical
and the timing mark on the flywheel is
sequence as illustrated on figure 17B.
alined with the pointer on the flywheel
Note. Insert the assembled end plate
housing.
assembly and the hydraulic head
AGO 3456A
47
