SP000069
Page 7
Remote Control Valve (Work Lever / Joystick)
GENERAL DESCRIPTION
Theory of Operation
Structure
The remote control valve contains four push rods, spring
holders, spools and return springs, which are in the valve
casing. The valve works as a pressure reduction valve.
The housing has six ports, which include input port P, tank port
T, and four secondary pressure ports.
The electric horn button is installed in the valve handle.
Gear pump pressure is used for operating control spools.
Function
1. Neutral Position
When the lever is in neutral mode, the spool is pushed
upward by return spring. The force of balancing spring,
which determines the secondary discharge pressure, is not
transmitted to the spool. The input port is closed and the
pressure of the output port is the same as the pressure of
the tank port T.
2. Control Switch
Pressing of the push rod starts to press the balance spring,
whose force is transferred to the spool to connect the P
and T ports, transferring the pilot pressure. Output
pressure acts on the bottom of the spool and press the
spool upwards until it is balanced with the force of the
balance spring.
In short, the second pressure (output pressure) changes in
proportion to the pressing force of the balance spring.
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