Chrysler 1991 - INJECTION TIMING; INJECTION PUMP TIMING

14 26 FUEL SYSTEM
Fig. 18 Installing Lockscrew Washer
• Tighten throttle support bracket mounting screws.
(12) Tighten injection pump drive shaft gear re-
taining nut to 65 N-m (48 ft. lbs.) torque.
(13) Install oil filler assembly to gear housing.
Tighten clamp screw to 43 N-m (32 ft. lbs.) torque.
(14) Install high pressure fuel lines. Refer to "High
Pressure Lines" in the Diesel Fuel Injection section
of Group 14, Fuel Systems, in the 1991 Rear Wheel
Drive Truck Service Manual. Tighten high pressure
fuel lines to 24 N-m (18 ft. lbs.) torque.
(15) Install fuel injection pump supply line. Refer
to "Fuel Injection Pump Supply Line" in the Diesel
Fuel Injection section of Group 14, Fuel Systems, in
the 1991 Rear Wheel Drive Truck Service Manual.
(16) Connect electrical connector to fuel solenoid.
(17) Connect electrical connector to KSB solenoid.
(18) Install fuel pump vent line and capscrew.
(19) Install air fuel control tube.
(20) Install throttle bracket (Fig. 7). Tighten
mounting bolts to 24 N-m (18 ft. lbs.) torque.
(21) Install throttle linkage. When connecting the
cable to the control lever, adjust the length so the le-
ver has stop-to-stop movement. Refer to Accelerator
Pedal and Throttle Controls section of Group 14,
Fuel Systems, in the 1991 Rear Wheel Drive Truck
Service Manual.
(22) Install and adjust throttle position sensor. Re-
fer to Service Adjustments.
(23) Bleed air from fuel system. Refer to "High
Pressure Fuel Lines" in the "Air Bleeding" portion of
the Diesel Fuel Injection section of Group 14, Fuel
Systems, in the 1991 Rear Wheel Drive Truck Ser-
vice Manual.
(24) Adjust the low idle speed if required. Refer to
"Service Adjustments" in this group.
(25) Inspect throttle linkage to ensure that the con-
trol lever breaks over the full throttle position. Ad-
just as necessary. Refer to Accelerator Pedal and
Throttle Cable section of Group 14, Fuel Systems, in
the 1991 Rear Wheel Drive Truck Service Manual.
INJECTION TIMING
If incorrect injection timing is suspected, injection
pump to engine timing or injection pump timing may
be the cause. Check injection pump timing before
checking injection pump to engine timing.
INJECTION PUMP TIMING
CAUTION: When setting injection pump timing, re-
fer to the engine identification plate attached to the
timing case flange for the correct specification (Fig.
19).
Fig. 19 Engine Identification Plate
The engine can be rotated with a barring tool such
as Snap-On No. SP371, MTE No. 3377462 (Cummins
Tool Division), or an equivalent.
The engine has a timing pin (Fig. 13). The pin en-
gages a hole in the camshaft gear when cylinder No.
1 is at TDC on the compression stroke.
CAUTION: During engine assembly by the manufac-
turer, the timing pin is positioned to correspond
with the compression stroke TDC position of cylin-
der number one. If the timing pin or gear housing is
removed, the timing pin location will not be correct
when reinstalled.
(1) Locate TDC position (compression stroke) for
cylinder number one by slowly rotating the engine
with the barring tool while lightly pushing in on the
timing pin. Stop when the timing pin engages the in-
dex hole in the camshaft gear.
(2) Once TDC has been located, pull the timing
pin out of the camshaft gear to the normal run
position.
(3) Remove plug and copper washer from the rear
of the injection pump (Fig. 20).
Dial gauges and dial gauge holders used to check
injection pump timing are commercially available.