Engine Tune-Up
4. Injector fuel control racks in the full-fuel position.
The letters R and L indicate the injector location in
the right or left cylinder bank, viewed from the rear of
the engine. Cylinders are numbered starting at the
front of the engine on each cylinder bank. Adjust the
No. 4R injector rack control lever first to establish a
guide for adjusting the remaining injector rack control
levers.
1. Remove the clevis pins which attach the right rear
bank and both left bank fuel rods to the injector
control tube levers.
2. Loosen all of the inner and outer injector rack
control lever adjusting screws on both cylinder banks.
Be sure all of the levers are free on the injector control
tubes.
Fig. 3 - Adjusting Governor Gap
3. Move the speed control lever to the maximum speed
position.
3. Place the speed control lever in the maximum speed
position.
4. Move the stop lever in the RUN position and hold
it in that position with a light finger pressure. Turn the
4 . Insert a .006" feeler gage between the spring
inner adjusting screw of the No. 4R injector rack
plunger and the plunger guide as shown in Fig. 3. If
control lever down until a slight movement of the stop
required, loosen the lock nut and turn the adjusting
lever is noted (Fig. 4). Turn down the outer adjusting
screw until a slight drag is noted on the feeler gage.
screw until it bottoms lightly on the control tube. Then
5. Hold the adjusting screw and tighten the lock nut.
Check the gap and readjust if necessary.
6. Use a new gasket and install the governor cover.
Position Injector Rock 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.
Certain engines use spring-loaded injector control
tube assemblies which have a yield spring at each
injector rack control lever and only one screw and lock
nut to keep each injector rack properly positioned.
Adjust the single screw and lock nut on each injector
rack control lever the same as for the two screw rack
control lever.
Properly positioned injector rack control 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.
Fig. 4 - Positioning No. 4R injector Rack
Control Lever
3 . High speed spring plunger is within .005" to
.007" of its seat in the governor control housing.
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