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AUTO PILOT
AUTO PILOT (AP-2 MODELS)
Description
The auto-pilot is a driver operated voluntary speed
control. It can be used either as a warning signal to
indicate that a pre-set speed has been reached, or as
a fully automatic vehicle speed regulator.
SERVICE PROCEDURES
SPEED WARNING OPERATION
The auto-pilot instrument panel control is used to
set the auto-pilot to a desired speed for existing driv-
ing conditions. When the pre-set speed is reached,
the auto-pilot provides a reaction pressure to the ac-
celerator pedal pressure. Since the reaction pressure
is low, five to seven pounds, the driver can over-ride
the setting by pressing the accelerator through the
reaction pressure.
AUTOMATIC OPERATION (Self Latching)
The auto-pilot is self engaging when the pre-set
vehicle speed is reached. Set the instrument panel
control to the desired speed and pull the button in the
center of the control "OUT." When the desired ve-
hicle speed is reached the reaction pressure is felt in
the accelerator pedal. At the point of reaction pressure
the driver's accelerator pedal pressure is relaxed and
the accelerator is in the auto-pilot automatic regula-
tion. The auto-pilot will automatically advance the ac-
celerator on uphill operation and retard on down
grade operation. Auto-pilot automatic control ceases
instantly with the slightest brake pedal movement and
the accelerator will revert to manual control. Disen-
gagement of the automatic control may also be ac-
complished
by
pushing "IN" the button in the center
of the instrument panel control or turning the igni-
tion switch to "OFF."
LUBRICATION
All internal working parts of the auto-pilot are
equipped with self-lubricated bearings, which have
been factory lubricated for the service life of the unit.
TESTS
The following mechanical and electrical tests will
aid in isolating and correcting malfunction conditions
for the auto-pilot. Service Diagnosis procedures must
be followed to make certain the malfunction is in the
auto-pilot unit and not in some other component of
the system.
If the malfunction cannot be definitely isolated, it
is recommended that the tests and adjustments be
w - .
Fig. I-Accelerator
Linkage Adjustment
performed in the following sequence:
Accelerator Linkage Adjustment
Control Cable Adjustment
Electrical Tests
ACCELERATOR LINKAGE ADJUSTMENT (Fig. 1)
(1) Make certain the automatic choke is
"OFF"
and
that the carburetor is at the normal idle position.
Op-
erate the linkage by moving the auto-pilot exterior
arm several times and allow the linkage to ease into
its normal position. Do not force the linkage to close
the throttle.
(2)
Loosen the lock nut on the auto-pilot linkage
rod and insert the locking arm gauge Tool C-3844 over
the stop stud on the auto-pilot.
(3) Hold the exterior arm against the gauge pin
and tighten the lock nut on the clearance between the
6 4 x 142
Fig. 2-Auto
Pilot Dust Shield
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