Toro Outcross 9060 Service Manual page 120

Raise
Hold
Lower
Hydraulic System: Hydraulic Flow Diagrams
(SP1). Fluid is also sent to one end of the flow regulator valve (EC2) spool. As
long as circuit flow is blocked at solenoid valve (SP1), the flow regulator valve
(EC2) spool is shifted to direct flow to the traction charge, 2 speed drive motor
control, brake release, differential lock and PTO clutch circuits.
Note: Depending on the programmable attachment settings, raising and
lowering the hitch may also disengage or engage the PTO.
When the hitch paddle is pulled upward, solenoid valve (SP1) is energized and
fluid flow is directed to the cap end of the hitch cylinders to raise the hitch arms.
As the cylinders extend, fluid from the rod end of the cylinders is allowed to
return to the hydraulic tank. If the hitch arms or the attachment being connected
are restricted, or the attachment being connected is above the 3-point hitch
capacity, relief valve (RV2) opens to prevent circuit pressure from exceeding
20,684 kPa (3000 psi).
Note: The maximum height the hitch arms can raise may be limited by the
programmable attachment settings, or by the bed active switch when an optional
cargo box is installed.
When the hitch paddle is released, solenoid valve (SP1) is de-energized and
the hydraulic fluid behind the cylinder piston is trapped to hold the cylinders in
position. The fluid is trapped by a check valve inside solenoid valve (SP1), a
check valve inside solenoid valve (SP2) and by check valve (CV2).
When the hitch paddle is pushed downward, solenoid valve (SP2) is energized
and the hydraulic fluid trapped behind the cylinder piston is allowed to return to
the hydraulic tank. The weight of the hitch arms and/or the attachment lowers
the hitch arms when the hydraulic fluid behind the cylinder piston is released.
Note: The minimum height the hitch arms can lower may be limited by the
programmable attachment settings.
Page 5–24 Outcross 9060
18234SL Rev B