3-1. ENGINE MAINTENANCE (CONT)
a. Engine Tune-up (SHEET 14 OF 21).
(7) Fuel Injection Governor Adjustments (Cont).
(b) Full Load Governed Speed Adjustment.
Start engine and operate at idle speed until normal operating tempera-
ture is obtained.
Tell assistant to operate vehicle at full load and watch exhaust. If
light brown exhaust haze is visible, full load governed speed adjust-
ment is okay. If black smoke is visible , or if there is a lack of
power and no haze or smoke is visible, shut down engine and go to step
Cut and remove two wire
seals from cover plate
capscrews. Discard wire
Remove four capscrews and
The following adjustment is sensi-
tive. Adjust full load delivery
screw no more than 5 degrees at a
If you turn full load de-
livery screw too far, fuel in-
jection pump will require removal
and calibration on factory test
Loosen nut and turn full
load delivery screw no more
than 5 degrees using
screwdriver. Turn full load
delivery screw clockwise if
engine lacks power and no
exhaust haze or smoke was
visible; turn counter-
clockwise if black smoke was
Hold full load delivery screw using screwdriver and tighten nut.
Repeat steps 1 and 2 above. If necessary, readjust full load delivery
screw until light brown exhaust haze is visible during full load oper-