Engine Tune-Up
alternately tighten both the inner and outer adjusting
screws.
NOTE: Overtightening of the injector rack
control lever adjusting screws during installa-
tion or adjustment can result in damage to the
injector control tube. The recommended torque
of the adjusting screws is 24 56 in-lbs (3-4
Nm).
IMPORTANT: The above step should result in
placing the governor linkage and control tube
assembly in the same position that they will
attain while the engine is running at full-load.
5. To be sure of the 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
the "rotating" movement of the injector control rack
(Fig. 5). 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. 6)
Fig. 6 - Checking Injector Control Rack
and when the pressure of the screw driver is released,
"Spring"
the control rack should "spring" back upward.
6. Remove the fuel rod-to-control tube lever clevis pin
If the rack does not return to its original position, it is
from the right front bank fuel rod and install it on the
too loose. To correct this condition, back off the outer
r i g h t rear bank fuel rod and adjust the No. 5R
adjusting screw slightly and tighten the inner adjusting
injector rack as outlined in Steps 4 and 5.
screw slightly.
7. Repeat Step 6 for adjustment of the No. 4L and 5L
The setting is too tight if, when moving the stop lever
injector racks. When the settings are correct, the
from the stop to the run position, the injector rack
No 4R 5R. 4L and 5L injector racks will he snug on
becomes tight before the stop lever reaches the end of
the hall end of the control levers when the injectors
its travel. This will result in a step-up in effort
are in the full fuel position.
required to move the stop lever to the end of its travel.
To correct this condition, back off the inner adjusting
8. With the fuel rod disconnected from the injector
screw slightly and tighten the outer adjusting screw
control tube lever, adjust the remaining injector rack
slightly.
c o n t r o l levers on the right front bank. Hold the
No. 4R injector rack in the full-fuel position by
means of the control tube lever and turn the inner
adjusting screw of the No. 3R injector rack control
lever until the injector rack has moved into 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.
NOTE: Overtightening of the injector rack
control lever adjusting screws during installa-
tion 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).
9. Recheck the No. 4R injector rack to be sure it has
remained snug on the ball end of the injector rack
control lever. If the rack of the No. 4R injector has
Fig. 5 - Checking Rotating Movement of
become loose, back off the inner adjusting screw
Injector Control Rack
slightly on the No. 3R injector rack control lever and
Page 114
