Toro Sand Pro 2040Z - Removing and Installing the Battery

Sand Pro 2040Z Page 4 - 13 Hydraulic System
Groomer Lift Circuit
In addition to replenishing the right side closed loop trac-
tion circuit with hydraulic oil, the charge pump in the right
side transmission supplies flow for the groomer (rear at-
tachment) lift circuit on Sand Pro 2040Z machines. Lift
circuit pressure is limited to 650 PSI (45 bar) by the im-
plement relief valve located in the right side transmis-
sion.
The charge pump is a fixed displacement gerotor pump
that is driven directly off the traction pump input shaft.
The pump has suff icient output to operate the rear at-
tachment lift cylinder under load.
When the rear attachment switch is in the neutral posi-
tion, neither of the control manifold solenoid coils is en-
ergized. Charge pump flow is directed back to the right
side transmission as fluid flow from the pump is routed
through the manifold and bypasses the groomer lift
cylinder. Fluid returns through the hydraulic oil filter and
then returns to the transmission as a normal part of the
charge circuit.
Raise Rear Attachment
When the rear attachment switch is pressed and held in
the raise position, the upper coil for solenoid valve (S)
in the hydraulic control manifold is energized. The
shifted valve allows a path for oil flow to the barrel end
of the lift cylinder.
Oil flow through shifted (S) is directed through the mani-
fold check valve (PC) and then out manifold port C1 to
the barrel end of the lift cylinder. The lift cylinder will ex-
tend to cause the rear attachment to raise. Oil from the
rod end of the lift cylinder returns to the right side trans-
mission through manifold port C2, shifted (S), manifold
port T and the hydraulic oil filter. Returning oil to the
transmission supplies the charge circuit.
When the rear attachment switch is released to the neu-
tral position, the upper solenoid coil will de- energize
and oil flow to the lift cylinder will cease. The rear attach-
ment will remain in position.
Lower Rear Attachment (Fig. 12)
When the rear attachment switch is pressed and held in
the lower position, the lower coil for solenoid valve (S)
in the hydraulic control manifold will be energized. The
shifted valve allows a path for oil flow to the rod end of
the lift cylinder.
Oil flow through shifted (S) is directed out manifold port
C2 to the rod end of the lift cylinder. The lift cylinder will
retract to cause the rear attachment to lower. As circuit
pressure increases, a m anifold sensing line unseats the
manifold check valve (PC) to allow a return path for oil
from the barrel end of the lift cylinder. Oil from the barrel
end of the lift cylinder returns to the right side transmis-
sion through manifold port C1, shifted (S), manifold port
T and the hydraulic oil filter. Returning oil to the transmis-
sion supplies the charge circuit.
When the rear attachment switch is released to the neu-
tral position, the lower solenoid coil will de- energize and
oil flow to the lift cylinder will cease. The rear attachment
will remain in position.
Figure 12
25 PSI
TP
C1 C2
2.2 GPM
PC
S
TOP
COIL
BOTTOM
COIL
(RETRACTING)
LOWER POSITION
OUTBOARD
PORT
INBOARD
PORT
Hydraulic
System