paladin JRB SMART-LOC, Руководство оператора

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20
OM90A
HYDRAULIC SCHEMATIC - LOW PRESSURE SYSTEM
HYDRAULIC
RESERVOIR
SWITCH
MAIN
PUMP
CT4
CT1
CT2
CT3
+V
RET
EXT
R
E
COUPLER
CYLINDER
SOLENOID
VALVE
SYSTEM SHOWN IN “LOCKED” POSITION
SOLENOID IS NOT ACTIVEATED.
The schematic shown is in the LOCKED position (no electrical power to solenoid). System pressure is
applied to the valve by the main hydraulic pump of the prime mover, the bucket circuit is also pressurized
through the main control valve. System pressure is transferred through valve port “P” to sequence valve
CT1. CT1 remains closed until the bucket cylinder pressure reaches 4000 PSI or over. At 4000 PSI CT1
opens and allows a maximum of 3250 PSI to be transferred through sequence valve CT2, valve CT3
and charges the head end of the coupler cylinder. The system maintains a positive force on the locking
plate at all times while the bucket cylinder is pressurized.
With the switch in the UNLOCK position (electrical power applied CT3). Pressure is transferred through
CT1, CT2, CT3 and energizes the rod-end of the coupler cylinder to retract the coupler locking plate.
Hydraulic fluid from the head end of the coupler cylinder moves through the “EXT” port back through
CT3 and drains into the hydraulic reservoir.
Note: The JRB Excavator Coupler is designed to be locked when there is no electrical power. In
other words, the coupler is locked by default. Electrical power is required to unlock the coupler.
OPERATION