Steering Circuit Problems - Toro Greensmaster 3120 Service Manual

Steering Circuit Problems

Hydraulic System: Troubleshooting
Problem
Steering wheel is hard to turn.
Driving in a straight line is difficult .
Steering wheel will not return to the neutral
position.
Steering wheel can turn on its own.
Backlash results when turning steering wheel.
Rear wheel shimmies when the steering wheel
is turned.
The steering wheel can be turned without the
rear wheel turning.
Steering response is too slow and heavy when
trying to turn quickly.
Turning steering wheel turns machine in the
opposite direction.
Steering force (possibly to one side only) is
insufficient.
Oil supply to the steering control valve is
insufficient (traction charge and lift circuits
affected as well).
Emergency steering ball in steering control
valve is missing or damaged.
Leaf springs in steering control valve are worn
or broken.
Gear wheel set in steering control valve is
worn.
Steering cylinder is seized or its piston seals
are worn.
Spool and sleeve are sticking to steering
control housing assembly.
Leaf springs in steering control valve are
broken or stuck.
Spool and sleeve are sticking to steering
control housing assembly.
Cardan shaft fork is worn or broken.
Leaf springs in steering control valve are worn
or broken.
Air is trapped in the steering cylinder.
Mechanical connections to the wheel or wheel
bearing are worn.
The steering cylinder is worn.
The gear set in the steering control valve is
worn.
Oil supply to the steering control valve is
insufficient (traction charge and lift circuits
affected as well).
Hoses to the steering cylinder are reversed.
Hydraulic flow to steering control valve is low
(traction charge and lift circuits affected as
well).
Relief valve in steering control valve is leaking
or damaged.
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Possible Causes
Greensmaster 3120
17230SL Rev C