Engine Tune-Up
pin in the throttle shaft assembly entering the slot in the differential lever.
b.
Install the four cover screws and lock washers finger tight.
c.
Pull the cover assembly in a direction away from the engine, to take up the slack, and tighten the cover
screws.
NOTE: This step is required since no dowels are used to locate the cover on the housing.
Position Injector Rack Control Levers
The position of the injector control rack levers must be correctly set in relation to the governor. Their position determines
the amount of fuel injected into each cylinder and ensures equal distribution of the load. Properly positioned injector
control rack levers with the engine at full-load will result in the following:
1.
Speed control lever at the maximum speed position.
2.
Stop lever in the RUN position.
3.
Injector fuel control racks in the full-fuel position.
Adjust the rear injector rack control lever first to establish a guide for adjusting
the remaining levers.
1.
Loosen all of the inner and outer injector rack control lever adjusting screws
(Fig. 2). Be sure all of the levers are free on the injector control tube.
2. Move the speed control lever to the maximum speed position.
Fig. 3 - Checking Rotating Movement of Injector Control Rack.
3. Move the stop lever to the RUN position and hold it in that position with light
finger pressure. Turn the inner adjusting screw of the rear injector rack
control lever down until a slight movement of the control tube is observed or
a step-up in effort to turn the screw driver is noted. This will place the rear
injector rack in the full-fuel position. Turn the outer adjusting screw down
until it bottoms lightly on the injector control tube. Then alternately tighten
both the inner and outer adjusting screws. This should result in placing the
governor linkage and control tube in the respective positions that they will
attain while the engine is running at full load.
NOTE: Overtightening of the injector rack control lever adjusting screws
during installation or adjustment can result in damage to the injector
control tube. The recommended torque of the adjusting screws is 24-36
in-lbs (3-4 Nm).
Fig. 4 - Checking Injector Control Rack "Spring"
4.
To be sure of proper rack adjustment, hold the stop lever in the RUN position and press down on the injector rack
with a screw driver or finger tip and note "rotating" movement of the injector control rack (Fig. 3). Hold the stop lever in
the RUN position and, using a screw driver, press downward on the injector control rack. The rack should tilt downward
(Fig. 4) and, when the pressure of the screw driver is released, the control rack should "spring" back upward.
If the rack does not return to its original position, it is too loose. To correct this condition, back off the outer adjusting
screw slightly and tighten the inner adjusting screw. The setting is too tight if, when moving the stop lever from the
STOP to the RUN position, the injector rack becomes tight before the stop lever reaches the end of its travel. This will
result in a step-up in effort
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