ELECTRICAL HIGH PRESSURE FUEL PUMP
Electric Motor Reassembly. (cont)
Remove retaining ring (18) from rear
Place rear end bell (4) over armature
and seat rim in housing. Aline match marks. Put drop of
threadlock compound (MIL-S-46163) on screws (3).
Install and tighten to 11 inch pounds (1.2 Nm).
Place spring shim (5), solid shim set
(6), and bearing cover (7) on top of bearing (15) and
secure with retaining ring (18). Sharp edges of retaining
ring should be toward motor.
Insert contract brush (2). Ensure that
the brush is alined properly with commutator.
(10) Install plug (1) and tighten gently.
Place drop of staking enamel on each cap.
Electric Motor Test.
Apply positive voltage to red lead and
negative voltage to black lead. Ensure that motor runs
clockwise when looking into shaft end.
If new brushes have been installed,
motor must run in at 27Vdc for at least 4 hours.
After completion of test, connect pump
to front end bell. Aline match marks and install screws.
Torque screws to 32 inch lbs (3.6 Nm).
Installation. Install electrical high pressure fuel pump in
fuel housing in accordance with paragraph 4-39b, TM 5-
SOLENOID VALVE. Maintenance of the
solenoid valve consist of testing and repair. See Figure
6-3 for location.
Remove solenoid valve in accordance
with paragraph 4-42a, TM 5-6115 612-12.
Install solenoid valve in test setup as
shown in Figure 6-7.
Ensure valves (4 and 6) are closed.
Actuate pump (1) to provide reading of
300psi + one gage (4).
Open valve (4 and 6). No fuel should
leak from drain or outlet ports. Gage (4) should still read
Apply 18Vdc to solenoid valve (5).
Fuel should flow from outlet port. No fuel should flow
from drain port.
Turn off power to solenoid valve. No
fuel should flow from drain or outlet ports.
Repeat steps (6) and (7) with 28Vdc.
(10) Apply air at 25-30 psi to outlet port.
There should be no air flow from either inlet or drain port.
(11) Apply 18Vdc to solenoid valve. Air
should flow from drain port.
(12) If solenoid valve fails to operate
properly, repair in accordance with paragraph 6-4c.
6-10 Change 4