Chrysler 1991 Service Manual Supplement page 122

FUEL S Y S T E I
14 - 25
Fig. 15 injection Pump Shaft LockScrew and
Washer
Fig. 16 Separating Pump Gear from injection Pump
Shaft
INSTALLATION
Before installing the injection pump, ensure that.
No. 1 cylinder is at No. 1 position.
(1) Locate TDC position (compression stroke) for
"No. 1 cylinder by slowly rotating the engine with the
barring tool while lightly pushing in on the timing
pin. Stop when the timing pin engages the index hole
in the camshaft gear.
(2) Disengage the timing pin from the camshaft
gear.
(3) Install a new injection pump gasket.
The shaft of a new or reconditioned pump is locked
in place. The key is positioned to align with the drive
gear slot when cylinder No. 1 is at TDC on the com-
pression stroke.
CAUTION; Ensure that the infection pump shaft key-
way does not fall into the gear housing when in-
stalling the injection pump. The key-way must be
removed if it falls into the gear housing.
(4) Install the injection pump. Finger tighten the
mounting nuts. The pump must be able to move in
the slot.
(5) Remove the T-bar from the injection pump gear.
' (6) Install pump drive shaft gear retaining nut and
spring washer. The injection pump will rotate
slightly i f the pump mounting nuts were in-
stalled finger tight and the crankshaft does not
move. ,
(7) Tighten injection pump drive shaft gear retain-
ing nut to 15 - 20 N-m (11 to 15 ft. lbs.) torque. Do
not over tighten. This is not the final tightening
torque. . . •
(8) I f installing , original injection pump rotate
pump to align timing marks. If installing a new or
rebuilt pump without a timing mark, take up gear
lash by rotating pump counterclockwise towards cyl-
inder head.
(9) Tighten injection pump mounting nuts to 24
N-m (18 ft. lbs.) torque. -'
If installing a new or rebuilt pump, permanently
mark the injection pump flange in line with the
mark on the gear housing (Fig. 17).
. Ig. 17 Marking New or Rebuilt Injection Pump
New and rebuilt injection pumps should be re-
ceived with the shaft locked in place by the
lockscrew.
(10) Loosen injection pump lockscrew and install
washer under lockscrew (Fig. 18). Tighten lockscrew
to 13 N-m (10 ft. lbs.) torque.
(11) Install injection pump support bracket with
mounting screws finger tight. Using following the
sequence, tighten mounting screws to 24 N-m (18 ft.
lbs.) torque.
® Tighten bracket to vacuum pump screw.
• Tighten bracket to block mounting screws.
• Tighten bracket to injection pump mounting
screws.