MODEL 66-80 VIBRATORY DRIVER/EXTRACTOR
VI. ELECTRICAL CIRCUITRY
F.STARTING THE VIBRATOR
With the diesel engine running, pressing the START button on the control pendant
energizes the start relay coil (R1). Start relay contacts (R1-A) close and keep the
relay coil energized until the STOP button is depressed. A second set of start
relay contacts (R1-B) close and energizes the FORWARD SOLENOID on the
Control Valve. The Control Valve sends hydraulic oil to the vibrator motors. The
motors start. A third set of contacts (R1-C) opens to prevent the OPEN
SOLENOID being energized to open the hydraulic clamp while the vibrator is
running.
G. STOPPING THE VIBRATOR
With the diesel engine running, pressing the STOP button on the control pendant
de-energizes the start relay coil (R1). The start relay contacts (R1-B) open and
de-energize the FORWARD SOLENOID. The Control Valve stops the flow of
hydraulic oil to the vibrator motors. The motors stop. The start relay contacts (R1-
C) close to allow the OPEN SOLENOID to be energized when the OPEN clamp
button is turned to the OPEN position.
H. OTHER
The ammeter (AM) indicates charging amperes. The tachometer generator
(TACH GEN) powers the tachometer (TACH) to indicate engine speed. The Hour
meter (M1) indicates the engine operating hours.
Duplicate vibrator and clamp switches are located on the control pendant and on
the control panel. Turning the LOCAL-REMOTE switch to LOCAL activates only
the clamp and vibrator switches located on the control panel. Turning the LOCAL-
REMOTE switch to REMOTE only permits operation of the clamp and vibrator
from the control pendant. The EMERGENCY STOP button on the pendant is
functional at all times.
Turning the Throttle switch to the FAST position will retract the electric throttle
actuator (M) and increase engine speed (RPM). Turning the Throttle switch to the
SLOW position will extend the electric throttle actuator (M) and decrease engine
speed.
Stopping the vibrator may be done by pressing either of the STOP buttons on the
Control Panel or the Control Pendant at any time, no matter which position the
LOCAL-REMOTE switch is in.
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