Hydraulic Flow Diagrams
Steering Circuit
A single section, belt driven gear pump supplies hydrau-
lic flow to the steering control valve and steering cylin-
der. The gear pump takes its suction from the transaxle.
Steering circuit pressure is limited by a relief valve lo-
cated in the gear pump.
inder is proportional to the amount of the turning on the
steering wheel. Fluid leaving the cylinder flows back
through the steering control spool valve, then to the oil
filter, and returns to the transaxle.
The steering control valve returns to the neutral position
when turning is completed.
Hydraulic flow and pressure to the steering control valve
can be monitored at the outlet of the gear pump.
Right Turn
With the steering wheel in the neutral position and the
engine running, flow enters the steering control valve
and goes through the steering control spool valve, by–
passing the rotary meter (V1) and steering cylinder.
Flow leaves the control valve, to the oil filter, and returns
to the transaxle.
When a right turn is made with the engine running, the
turning of the steering wheel positions the spool valve so
that flow goes through the bottom of the spool. Flow en-
tering the steering control valve from the pump goes
through the spool, to the rotary meter (V1), and out the
R port. Pressure extends the steering cylinder piston for
a right turn. The rotary meter ensures that the oil flow to
the cylinder is proportional to the amount of the turning
on the steering wheel. Fluid leaving the cylinder flows
back through the steering control spool valve, then to
the oil filter, and returns to the transaxle.
Left Turn
When a left turn is made with the engine running, the
turning of the steering wheel positions the spool valve so
that flow goes through the top of the spool. Flow entering
the steering control valve from the pump goes through
the spool, to the rotary meter (V1), and out the L port.
Pressure contracts the steering cylinder piston for a left
turn. The rotary meter ensures that the oil flow to the cyl-
The steering control valve returns to the neutral position
when turning is completed.
STEERING CYLINDER
PISTON MOVEMENT
STEERING CYLINDER
NO PISTON MOVEMENT
STEERING CYLINDER
PISTON MOVEMENT
R
L
L
R
L
R
T
P
STEERING
CONTROL
T
P STEERING
CONTROL
T
P
STEERING
CONTROL
NEUTRAL POSITION
LEFT TURN
RIGHT TURN
Figure 6
Multi Pro 1200/1250
Page 4 – 7
Hydraulic System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Multi Pro 1200, Toro Multi Pro 1250 |
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| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
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| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
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