C 20 3/4 Ton Pickup 2WD V8-379 6.2L DSL VIN J FI (1982)
FIGURE 1
Since service pumps may be of a different vintage than the removed pump, the following must be adhered to for correct timing setting whenever
installing a replacement injection pump:
1.
All injection pumps have a model identification plate which is attached to the pump housing just below the throttle linkage. The plate includes the
(1) model number, (2) serial number and (3) the part number (Figure 1).
2.
Remove and install injection pump per service manual procedure.
FIGURE 2
3.
Refer to Figure 2 which displays the location of the timing marks which are stamped into the injection pump flange and the front housing.
4.
Remove any timing tape that is over the stamped marks.
5.
Refer to the model identification plate on the pump that is being installed. Use the following chart to determine the timing mark alignment setting:
Model
Timing Mark
Number
Engine/RPO
Pump P/H
Offset
DB2-4090
Light Duty (LH6)
14050587
1.5 mm
DB2-4091
Heavy Duty (LL4)
14050588
2.5 mm
DB2-4126
Light Duty (LH6)
14050587
Aligned
DB2-4153
Heavy Duty (LL4)
14050588
Aligned