Section 9: ELECTRICAL COMPONENTS AND CICUITRY
Page 72
OM-ZR-May15
Hydraulic Clamp
Vibrator
With the diesel engine running, turning the clamp switch (OPEN-CLOSE) on the PENDANT to CLOSE energizes
the CLOSE-CLAMP SOLENOID (CS) on the hydraulic CLAMP CONTROL VALVE. The clamp closes.
When the pressure in the close-clamp hydraulic circuit reaches 4,500 psi (310 bar), the CLAMP PRESSURE
SWITCH (PS1) de-energizes the CLOSE-CLAMP SOLENOID and turns on the on the clamp CLOSED lights on the
PENDANT and CONTROL PANEL. If the close-clamp pressure falls below 4,500 psi, the CLAMP PRESSURE
SWITCH reenergizes the CLOSE-CLAMP SOLENOID to rebuild clamp pressure. The CLOSED lights are turned
out. When pressure returns to 4,500 psi (310 bar), the CLAMP PRESSURE SWITCH de-energizes the CLOSE-
CLAMP SOLENOID and turns on the CLOSED lights.
With the diesel engine running, holding the CLAMP SWITCH (OPEN-CLOSE) in the OPEN position energizes the
OPEN-CLAMP SOLENOID (OS). The clamp opens. The CLOSED lights are turned out.
With the diesel engine running, turning the MAIN (REV-OFF-FOR) switch on the PENDANT to FOR energizes the
FORWARD SOLENOID (FS) on the hydraulic MAIN CONTROL VALVE. The MAIN CONTROL VALVE directs
hydraulic oil to the vibrator hydraulic motors and the vibrator starts.
With the diesel engine running, turning the MAIN (REV-OFF-FOR) switch on the PENDANT to OFF de-energizes
the FORWARD SOLENOID on the MAIN CONTROL VALVE. The vibrator stops.
1. To increase eccentric moment, turn the Moment (DEC-INC) to INC. The eccentric moment will increase.
Full eccentric Moment should be achieved in about 3 seconds.
2. To decrease eccentric moment, turn the MOMENT (DEC-INC) switch to DEC. The eccentric moment will
decrease. Zero eccentric moment shall be achieved in about 3 seconds.
1. Turn the MOMENT (DEC - INC) to DEC, hold for 3 seconds and release.
Eccentric moment will go to zero.
2. Turn the MAIN (REV-OFF-FOR) switch to OFF position. Momentarily turning the
switch to the REV position has no effect and will not cause damage
or adverse operation.
ZR Function (Moment or Phase Control)
Other
An AUXILIARY CIRCUIT switch (AS) is mounted on the CONTROL PANEL and to control an optional AUXILIARY
CONTROL VALVE.
An HOUR METER records the time the MAIN (REV-OFF-FOR) switch is in the FOR or REV position.
The yellow light on the control panel illuminates when oil pressure from vibrator’s lube pump is normal. An
operating temperature of 100
°
F (38
°
C) is required for the pressure switch to turn on light. Check the pressure
gauge mounted on switch center of reservoir to verify pressure when vibrator is first started.
Eccentric Moment
Actuator
