Engine Tune-Up
7. Loosen the nut which locks the ball joint on the fuel
determines the amount of fuel injected into each
rod. Hold the fuel rod in the full-fuel position and adjust
cylinder and ensures equal distribution of the load.
the ball joint until it is aligned and will slide on the ball
Adjust the rear injector rack control lever first to
stud on the stop lever (Fig. 4). Position the shutdown
establish a guide for adjusting the remaining levers.
cable clip and tighten the fuel rod lock nut to retain the
1. Clean and remove the valve rocker cover. Discard
adjustment.
the gasket.
8. Check the adjustment by pushing the fuel rod toward
2. Disconnect the fuel rod at the stop lever.
the engine and make sure the injector control rack is in
the full-fuel position. If necessary, readjust the fuel rod.
3. Loosen all of the inner and outer injector rack control
lever adjusting screws. Be sure all of the injector rack
9. Manually hold the rear injector rack in the full-fuel
control levers are free on the injector control tube.
position, with the lever on the injector control tube, and
turn the inner adjusting screw of the adjacent injector
4. Move the speed control lever to the maximum speed
rack control lever down until the injector rack moves into
position.
the full-fuel position. Turn the outer adjusting screw
5. Adjust the rear cylinder injector rack control lever
down until it bottoms lightly on the injector control tube.
adjusting screws (Fig. 3) until both screws are equal in
Then alternately tighten both the inner and outer
height and tight on the injector control tube.
adjusting screws.
6. Move the rear injector control rack into the full-fuel
NOTE: Overtightening of the injector rack control
position and note the clearance between the fuel rod
lever adjusting screws during installation or
and the cylinder head bolt. The clearance should be
adjustment can result in damage to the injector
1/32 " or more. If necessary, readjust the injector rack
control tube. The recommended torque of the
adjusting screws until a clearance of at least 1/32" to
adjusting screws is 24-36 in-lbs (3-4 Nm).
1/16" exists. Tighten the adjustment screws.
10. Recheck the rear injector rack to be sure that it has
remained snug on the ball end of the rack control lever
while adjusting the adjacent injector rack. If the rack of
the rear injector has become loose, back off the inner
adjusting screw slightly on the adjacent injector rack
control lever and tighten the outer adjusting screw.
When the settings are correct, the racks of both injectors
must be snug on the ball end of their respective control
levers.
Fig. 3 - Adjusting Injector Rack Control Lever
Adjusting Screws
Fig. 4 - Adjusting Fuel Rod Length
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