Toro Reelmaster 5200-D Service Manual

Reelmaster 5200-D/5400-D Hydraulic SystemPage 4 - 13
Lower Cuttings Units
A three section, gear pump is driven off the PTO output
shaft of the hydrostatic transmission. Pump section (P3)
provides oil flow through the steering control valve and
hydraulic manifolds to all five cutting unit lift cylinders.
Maximum circuit pressure (1250 PSI) is limited by a re-
lief valve in the gear pump.
When the cutting units are in the raised position, flow
from the gear pump (P3) is by-passed through the steer-
ing control valve, hydraulic manifold, 250 PSI relief
valve, and to the hydraulic reservoir.
To lower the cutting units, solenoid valves (S3), (S4),
and (S5) energize along with solenoid valve (S6). Valve
(S6) is a load holding poppet-type valve. Solenoid valve
(S7) is in its normally de-energized position, and allows
oil from the rod end of the cylinders to return to the hy-
draulic reservoir. Hydraulic pressure against the piston
side of the cylinder causes the shafts to extend, and low-
er the cutting units. When the solenoids are deener-
gized, the lift cylinders are locked in the lowered
position.
The 250 PSI relief valve maintains a back pressure on
the lift cylinders as they dump oil to the hydraulic reser-
voir.
Hydraulic
Systems

Toro Reelmaster 5200-D Specifications

General

Brand	Toro
Model	Reelmaster 5200-D
Category	Lawn Mower
Language	English