TM 5-3820-245-14&P
rack becomes tight before the stop lever reaches the
10. Use a new gasket and replace the valve rocker
end of its travel. This will result in a step-up in effort
cover.
required to move the stop lever to the RUN position and
Adjust Maximum No-Load Speed
a deflection in the fuel rod (fuel rod deflection can be
seen at the bend). If the rack is found to be too tight,
back off the inner adjusting screw slightly and tighten
All governors are properly adjusted before leaving the
the outer adjusting screw.
factory.
However, if the governor has been
reconditioned or replaced, and to ensure the engine
5. To adjust the remaining injector rack control levers,
speed will not exceed the recommended no-load speed
remove the clevis pin from the fuel rod and the injector
as given on the option plate, the maximum no-load
control tube lever, hold the injector control racks in the
speed may be set as follows:
full-fuel position by means of the lever on the end of the
control tube. Turn down the inner adjusting screw on
Start the engine and after it reaches normal operating
the injector rack control lever of the adjacent injector
temperature, determine the maximum no-load speed of
until the injector rack has moved into the full-fuel
the engine with an accurate tachometer. Then stop the
position and the inner adjusting screw is bottomed on
engine and make the following adjustments, if required.
the injector control tube. Turn the outer adjusting screw
down until it bottoms lightly on the injector control tube.
1. Refer to Fig. 8 and disconnect the booster spring and
Then alternately tighten both the inner and outer
the stop lever retracting spring.
adjusting screws.
2. Remove the variable speed spring housing and the
6. Recheck the rear injector rack to be sure that it has
variable speed spring retainer located inside of the
remained snug on the ball end of the rack control lever
housing.
while adjusting the adjacent injector rack. If the rack of
the rear injector has become loose, back off the inner
3. Refer to Table 1 and determine the stops or shims
adjusting screw slightly on the adjacent injector rack
required for the desired full-load speed. Do not use
control lever and tighten the outer adjusting screw.
more than four thick and one thin shim. A split stop can
When the settings are correct, the racks of both injectors
only be used with a solid stop (Fig. 5).
must be snug on the ball end of their respective control
Full Load Speed
STOPS
SHIMS
levers.
RPM
Solid Ring
Split Ring
7. Position the remaining injector rack control levers as
2575-2800
0
0
As Required
outlined in Steps 4, 5 and 6.
2101-2575
1
0
As Required
1701-2100
1
1
As Required
8. When all of the injector rack control levers are
1200-1700
1
2
As Required
adjusted, recheck their settings. With the control tube
TABLE 1
lever in the full-fuel position, check each control rack as
in Step 4. All of the control racks must have the same
4. Install the variable speed spring retainer and housing
"spring" condition with the control tube lever in the full-
and tighten the two bolts.
fuel position.
5. Connect the booster spring and stop lever spring.
9. Insert the clevis pin in the fuel rod and the injector
Start the engine and recheck the maximum no-load
control tube levers.
speed.
6. If required, add shims to obtain the necessary
operating speed. For each .001" in shims added, the
operating speed will increase approximately 2 rpm. If
the maximum no-load speed is raised or lowered more
than 50 rpm by the installation or removal of shims,
recheck the governor gap. If readjustment of the
Fig. 5 - Locating of Shims and Stops
PAGE 174
TM 5-3820-245-14&P
