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Figure 1-7. Mini-Valve Left Port Activated
• Spool Valve-Pushed to the right by electric
solenoid. This opens the internal oil pressure gal-
ley allowing the fluid to go through the check valve
and on to the cylinder. Also, the spool valve opens
the oil return line providing an oil path through the
internal oil galley back to the reservoir.
• Pilot Plunger Valve - Right pilot plunger valve
is pushed up by the incoming oil pressure mechani-
cally opening the check valve located above it in
the return circuit. This action allows the oil from the
return side of the slave cylinder to go back into the
reservoir. The left pilot plunger valve is not affected
in this operation mode.
• Check Valves - Both check valves are opened
in this operation mode. The left check valve is
pushed open by the oil pressure created by the
pump. The oil then continues to go through the
lines and supplies the inlet pressure to move the
slave cylinder piston. The right check valve is held
open mechanically by the pilot plunger and allows
the oil from the return side of the slave cylinder to
go through the mini-valve back to the reservoir.
• Speed Control - The left speed control (out-
put side) does not have any effect in this operation
mode because the oil is routed around the speed
control through a by-pass valve to the output port.
The right speed control controls the speed of the
table function by restricting the flow of oil going
back into the reservoir.
Mini-Valve Right Port Activated
(See figure 1-6)
Right Mini-Valve Port is Supply Line
Left Mini-Valve Port is Return Line
Mini-Valve Left Port Activated
(See figure 1-7.)
Left Mini-Valve Port is Supply Line
Right Mini-Valve Port is Return Line
Figure 1-6. Mini-Valve Right Port Activated
• Spool Valve-Pushed to the left by electric
solenoid. This opens the internal oil pressure gal-
ley allowing the fluid to go through the check valve
and on to the cylinder. Also, the spool valve opens
the oil return line providing an oil path through the
internal oil galley back to the reservoir.
• Pilot Plunger Valve - Left pilot plunger valve is
pushed up by the incoming oil pressure mechani-
cally opening the check valve located above it in
the return circuit. This action allows the oil from
the return side of the slave cylinder to go back into
the reservoir. The right pilot plunger valve is not
affected in this operation mode.
• Check Valves - Both check valves are opened
in this operation mode. The right check valve is
pushed open by the oil pressure created by the
pump. The oil then continues through the lines
and supplies the inlet pressure to move the slave
cylinder piston. The left check valve is held open
mechanically by the pilot plunger and allows the
oil from the return side of the slave cylinder to go
through the mini-valve back to the reservoir.
• Speed Control - The right speed control (out-
put side) does not have any effect in this operation
mode because the oil is routed around the speed
control through a by-pass valve to the output port.
The left speed control controls the speed of the table
function by restricting the flow of oil going back into
the reservoir.
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