LOAD KING 35-127 M, Руководство оператора

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UNLOADER PARTS GROUP
The unloader valve solenoid manifold is located on top of the console assembly, under the swing drive
cover� The valve contains two electrically operated solenoids which operate to either contain or unload
a pilot signal� (Note: One solenoid is exclusively for the 2-speed winch�) When the solenoid is energized,
it is closed and no oil is permitted to pass through the valve� There are three check cartridges in the top
of the valve to prevent interfeed between the other functions incorporated into the block (boom extend,
winch up, and boom down�) The 2-speed winch solenoid is also isolated to prevent interference with the
boom functions�
The function of “unloading” oil is done by a pilot operated cartridge referred to as a ported anti-void� The
anti-void valves are located on the boom and winch control valves� The anti-void separates the work oil
from the tank passage in the boom control valve� By adding an orifice in the anti-void, it becomes
pressure balanced� When the solenoid on the ATB unloader is opened, oil starts to flow across the orifice
in the anti-void and the oil can get out faster than it can get in� This creates a pressure drop and allows
the anti-void to open, routing the function oil to tank� See this page for the console components location
chart�