ACCESSORIES MLC165-1 SERVICE/MAINTENANCE MANUAL
10-8
Published 05-26-17, Control # 238-02
Node 5 then sends a 24Vdc signal to the left or right
counterweight down solenoid, energizing it.
The valve spool moves to the reversing position. Fluid flows
from the pressure port, through the valve, and on to the
holding valve. At the holding valve, fluid flows through the
check valve at the rod end of the valve and into the rod end
of the cylinder. At the same time, fluid opens the valve at the
barrel end of the cylinder. As fluid fills the rod end of the
cylinder, the rod retracts and the movement forces fluid out
of the barrel end, through the open holding valve, through
the open valve, and back to tank.
Counterweight Pin Pullers
Neutral
Node 5 sends 24Vdc to the counterweight pins disengage
switch pole in the remote setup. The switch is momentary
and normally open, so node 5 reads back 0Vdc back when
the switch is not being pressed.Node 5 then sends a 24Vdc
signal to the counterweight pins in solenoid, energizing it.
The valve spool moves to the open position. Fluid flows from
the pressure port, through the valve, and on to the cylinder.
As fluid fills the barrel end of the cylinder, the rod extends
and the movement forces fluid out of the rod end, through the
open valve, and back to tank.
Disengage
When the counterweight pins disengage switch in the remote
set up controller is toggled to the disengage position, the
disengage contact closes and sends the 24Vdc supply signal
back to the corresponding node. Node 5 then sends a 24Vdc
signal to the counterweight pins out solenoid, energizing it.
The valve spool moves to the reversing position. Fluid flows
from the pressure port, through the valve, and on to the
cylinder. As fluid fills the rod end of the cylinder, the rod
retracts and the movement forces fluid out of the barrel end,
through the open holding valve, through the open valve, and
back to tank.
M100842
Figure 10-10. Counterweight Pin Puller Control
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