Toro Groundsmaster 360 Service Manual page 171

NOTE: The ports on the QAS control manifolds are
marked for easy identification of components. See Hy-
draulic Schematic for Groundsmaster 360 with 4WD in
Chapter 9 -- Foldout Drawings to identify the function of
the hydraulic lines and cartridge valves at each manifold
port.
QAS Control Manifold Cartridge Valve Service
CAUTION
Before opening hydraulic system, operate all hy-
draulic controls to relieve system pressure and
avoid injury from pressurized hydraulic oil. See
Relieving Hydraulic System Pressure in the Gen-
eral Information section of this chapter.
WARNING
If control manifold is attached to machine, make
sure that attachment and QAS frame are fully
lowered and supported before loosening hy-
draulic lines, cartridge valves or plugs from con-
trol manifold. If attachment is not supported as
manifold components are loosened, attachment
and QAS frame may drop unexpectedly.
IMPORTANT: The solenoid cartridge valves in the
QAS angle control manifold (Fig. 144) are different.
Label the valves before removal so the valves can
be correctly installed into the manifold.
IMPORTANT: An orifice is placed in ports C3 and C4
of the QAS angle control manifold (Fig. 144). If an
orifice is removed from this manifold, make sure to
label its position for assembly purposes. When
installing orifice in manifold port, make sure that
orifice is flat in the base of the manifold port. Man-
ifold damage is possible if the orifice is cocked in
the cavity.
For cartridge valve service procedures, see Control
Manifold Cartridge Valve Service in this section. Refer
to Figure 144 for QAS angle control manifold cartridge
valve installation torque. Refer to Figure 145 for QAS
poppet valve control manifold cartridge valve installa-
tion torque.
Groundsmaster 360
3
20 ft- -lb
(27 N- -m)
1
1. Poppet valve manifold
2. Solenoid valve
3
1. Poppet valve manifold
2. Angle manifold
Page 4 - - 137
4
60 in- -lb
(6.8 N- -m)
2
Figure 145
3. Solenoid coil
4. Coil nut
1
2
Figure 146
3. LH QAS lift cylinder
4. RH QAS lift cylinder
Hydraulic System
4