SECTION 4
DDFP
GOVERNOR SOLENOID-ADJUSTMENT
The mechanical governor is controlled by a DC solenoid. A
spring loaded yield link is included as part of the e xternal
linkage from the run/stop lever to governor solenoid.
IMPORTANT:
To insure the engine will produce rated
nameplate horsepo wer, the g ap be-
tween the yield link and the solenoid
plunger must be properly adjusted.
(Refer to Figure 3.)
YIELD LINK GAP CHECK
Position the mode selector switch on the instrument panel
(Fig. 3, Page 32), to the MANUAL position. Manually push
the solenoid plunger into the solenoid. When the plunger is
at full tra vel, the hold coil magnetic f ield will hold the
plunger, linkage and the run/stop le ver in the run position.
Push on the plunger spring bolt, not the linkage or the lever.
Check the gap at the narrowest point and adjust if necessary,
(Refer to Fig. 3). After the check is completed return the
mode selector switch to the AUTOMATIC position.
WARNING:
DO NOT lea ve the MODE SELECT OR
switch in the MANU AL R UN position
during AUTOMATIC operation. (The
controller will be una ble to stop the
engine and O VERHEAT D AMAGE
WILL RESULT)
Page 46-A
53 SERIES ENGINES
Adjust the Gap by loosening the Lever Clamping Bolt (Fig.
3), and rotating the Run/Stop Lever on the governor shaft to
the desired position and re-torque the clamping bolt. Re-
check the gap and repeat adjustments if necessary. After the
check is completed return the mode selector switch to the
AUTOMATIC position.
After the gap has been properly adjusted, and with the gov-
ernor solenoid de-ener gized, in the ST OP position, adjust
the Plunger Stop Bolt. Set at zero clearance with the Plunger
Spring Bolt, then turn one full turn clockwise and lock with
the Jam Nut.
WARNING:
DO NOT lea ve the MODE SELECT OR
switch in the MANU AL R UN position
during AUTOMATIC operation. (The
controller will be unable to stop the
engine and O VERHEAT D AMAGE
WILL RESULT)
When the adjustments have been completed, start the engine
from the ENGINE CONTROLLER (AEC), using the MAN-
UAL mode. Verify the Gap Dimension again, then stop the
engine. Return all controls to the AUTOMATIC mode.
Figure 3 - Shown in the Energized/Run Position
Figure 2 - Speed Adjustment 71 & 92 Series
