DETROIT DIESEL
Engine Tune-Up
retaining nut on the speed control lever. Loosen the
lock nuts on the eye bolt at the opposite end of the
booster spring.
3. Move the spring retaining bolt in the slot of the
speed control lever until the center of the bolt is on or
slightly over center (toward the idle speed position) of
an imaginary line through the bolt, lever shaft and eye
bolt. Hold the bolt and tighten the lock nut.
4. Start the engine and move the speed control lever to
the maximum speed position and release it. The speed
control lever should return to the idle position. If it
does not, reduce the tension on the booster spring. If
the lever does return to the idle position, continue to
increase the spring tension until the point is reached
that it will not return to idle. Then reduce the tension
until it does return to idle and tighten the lock nut on
the eye bolt. This setting will result in the minimum
force required to operate the speed control lever.
Fig. 9 Adjusting Booster Spring
5. Connect the linkage to the governor levers.
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