Engine Tune-Up
DETROIT DIESEL
ADJUSTMENT OF MECHANICAL GOVERNORSHUTDOWN SOLENOID
2. With the stop lever in the run position, adjust the rod
When a governor shutdown solenoid is used on an
end eye or right angle clip for minimum engagement on
engine equipped with a mechanical governor, the
the solenoid plunger when the connecting bolt is
governor stop lever must be properly adjusted to match
installed. The oversize hole in the eye or clip will
the shutdown solenoid plunger travel.
thereby permit the solenoid to start closing the air gap,
with a resultant build-up of pull-in force prior to initiating
The solenoid plunger can be properly aligned to the
stop lever movement.
governor stop lever as follows:
3. The bolt through the rod end eye or the right angle
1. Remove the bolt connecting the rod end eye
clip should be locked to the stop lever and adjusted to a
(variable speed governor), or the right angle clip
height that will permit the eye or clip to float vertically.
(limiting speed governor) to the stop lever (Figs. 6 and
The clearance above and below the eye or clip and the
7). Align and clamp the lever to the shutdown shaft in
bolt head should be approximately 1/32" minimum.
such a way that, at its mid-travel position, it is
perpendicular to the solenoid plunger. This assures that
the linkage will travel as straight as possible. The
NOTE: The lock nut can be either on
solenoid plunger has available 1/2" travel which is more
top of or below the stop lever.
than adequate to move the injector control racks from
the full-fuel to the complete no-fuel position and
4. Move the lever to the stop position and observe the
shutdown will occur prior to attaining complete travel.
plunger for any possible bind. If necessary, loosen the
Fig. 6 - Typical Variable Speed Governor Lever Position
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