Engine Tune-Up
control lever while positioning the No. 2L injector
CAUTION: Care should be taken to avoid
rack. If the rack of the No. 1L injector has become
setting the racks too tight and causing the fuel
loose, back off the inner adjusting screw slightly on the
rod to bend.
No. 2L injector rack control lever. Tighten the outer
7 . To be sure the rack control lever is properly
adjusting screw. When the settings are correct, both
adjusted, press down on the injector rack with a screw
injector racks must respond in the same manner on the
driver or finger tip (Fig. 3). A. light pressure should
hall end of their respective rack control levers as
cause the rack to rotate. The rack is sufficiently tight if
previously outlined in Step 7.
the rack returns or springs back to its original position
when the pressure is removed. The rack is too tight if
12. Position the remaining injector rack control levers
a heavy pressure is required to rotate the rack.
on the left and right cylinder heads as outlined in
Steps 10 and 11 When the settings are correct, all of
8. Adjust the No. 1L injector rack control lever as
the injector racks will be snug on the ball end of the
outlined in Steps 6 and 7.
control levers when the injector control tube lever is
held in the full-fuel position.
9. Check the adjustment on the 1R and 1L injector
rack control levers. If the setting is correct, the injector
13. Remove the bolt from the recessed hole in the
racks will be in the full-fuel position and snug on the
drive housing a n d install linkage gage J 21304
ball end of the control levers.
(Fig. 4).
10. To adjust the remaining injector rack control
14. Replace the governor operating lever on the
levers, hold the No. IL injector rack in the full-fuel
serrated shaft so that the bolt hole is lined up within
position by means of the lever on the end of the
the proper lines on the gage (Fig. 5). The type of
control tube assembly. Turn down the inner adjusting
governor (SGX or PSG) will determine the proper
screw of the No. 2L injector rack control lever until
position of the lever.
the injector rack has moved into the full--fuel position.
Turn the outer adjusting screw down until it bottoms
15. Remove the gage.
lightly on the injector control tube. Then alternately
tighten both the inner and outer adjusting screws.
16. Move the bell crank lever to the no-fuel position.
NOTE: Overtightening of the injector rack
17. Adjust the length of the vertical link so that the
control lever adjusting screws during installa-
bolt holes of the levers and the centers of the rod end
tion or adjustment can result in damage to the
bearings are lined up (Fig. 6).
injector control tube. The recommended torque
of the adjusting screws is 24-36 in-lbs (3-4
Nm).
11. Recheck the No. 1L injector rack to be sure that it
has remained snug on the ball end of-the injector rack
Fig. 5 - Governor Operating Lever in Position
Fig. 4 - Linkage Gage in Position
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