TM 9-2330-356-14
(4) Apply a thin coat of petrolatum (item 23,
(6) Rotate lever (41) while holding sleeve of
control unit assembly (4). Shaft must turn freely. If a
binding condition exists, wash assembly in a cleaning
assemble it to the hub on the face gear (28).
agent, and repeat procedure. If binding condition is still
present, injection pump must be replaced. Also ensure
(5) Carefully center spring ring (27) on hydraulic
head assembly.
that weld holding lever to shaft is intact.
(6) Position the face gear (28) and thrust washer
(7) The flat end of plunger sleeve pin (5) must be
(29) over the end of the plunger (35), and aline the head of
checked for clearance in the mating slot of the plunger
the plunger sleeve pin (5) with its mating slot located on
sleeve. If the clearance is greater than 0.0015-inch, the
the inside of the face gear (28).
injection pump must be replaced.
c.
Reassembly (Fig. 7-46).
CAUTION
Do not use extreme pressure. If gear will not
snap Into place easily, remove gear and
CAUTION
check to see that spring ring (27) Is centered,
and that plunger drive pin (1, fig. 7-50) is
Be careful not to damage O-ring gaskets.
properly alined.
(7) Press the face gear (28, fig. 7-46) onto the
(1) After all parts have been thoroughly cleaned
hydraulic head (17). Ensure that the spring ring (27) snaps
and inspected, dip the individual parts in clean diesel fuel
into its mating groove in the face gear (28). Manually
(item 14, Appendix E).
operate the plunger up and down. Free movement of the
plunger indicates that the face gear has been correctly
(2) Invert the hydraulic head (17, fig. 7-46) and
assembled to the hydraulic head.
place it on a clean bench so that the head locating slot is
forward.
(8) With head still in an inverted position, raise
plunger (35) to its highest position.
(3) Aline the plunger drive pin (1, fig. 7-50) into
the plunger (2) so that the head of the plunger drive pin is
(9) Apply grease (item 17, Appendix E) to
in line with the distributor slot. Turn the plunger drive pin
exposed portion of plunger to keep it in its highest
until its long side is parallel to the length of the plunger
position.
with long end up.
(10) Install spring (26) and spring retaining washer
(24). Snap spring seat (25) into place on the head of
LONG SIDE OF HEAD PIN
1. Plunger drive pin
2. Plunger
plunger (35).
MUST BE PARALLEL TO
3. Hydraulic head
LENGTH OF PLUNGER
4. Plunger sleeve
AND UPWARD
(11) Install the plunger button (23) onto the end of
the plunger and secure it by snapping the spring ring (22)
into its mating groove in the lower spring seat (25).
(12) Ensure that the button spring ring (22) fits
tightly into its groove in the lower spring seat (25). Loose
spring rings (22) must be replaced.
(13) Apply thin coat of petrolatum (item 23,
into the face gear (28).
(14) Apply a thin coat of petrolatum (item 23,
Insert O-ring into the head bore of the pump housing (6).
Install the O-ring into its groove on the upper portion of
the hydraulic head. Ensure that O-rings seat properly.
TA100121
(15) Clamp pump mounting fixture in a vise,
install pump housing fixture, then carefully insert the
7-44
