Toro Groundsmaster 5900 Series Service Manual page 213

Cartridge Valve Service
Groundsmaster ® 5900 & 5910
16227SL Rev B
The ports on the traction control manifold are marked for easy identification of
components. Example: P1 is the piston pump connection port for the forward
direction and SV is the location for the high/low speed solenoid valve (see
Hydraulic Schematic (page A–3)
cartridge valves at each port).
Although not recommended in most situations, relief valve RV1 and check valve
CV5 are adjustable (see
An orifice is placed beneath the plug in the control manifold OR4
port. If the plug is removed, make sure to remove the orifice and
label its position for assembly purposes.
Note: The traction control manifold includes several zero−leak plugs. These
plugs have a tapered sealing surface on the plug head that is designed to resist
vibration induced plug loosening. The zero−leak plugs also have an O−ring as a
secondary seal. If zero−leak plug removal is necessary, lightly rap the plug head
using a punch and hammer before using an allen wrench to remove the plug: the
impact will allow plug removal with less chance of damage to the socket head of
the plug. Tighten plugs to torque value provided
For cartridge valve service procedures, see
5–158).
to identify the function of the hydraulic lines and
Adjust Manifold Relief Valves (page
IMPORTANT
Cartridge Valve Service (page
Page 5–113
5–72)).
(Figure 100).
Hydraulic System: Service and Repairs
A