Toro Greensmaster 3250-D 04383 Service Manual page 68

Problem
Cutting units will not lift or lift slowly.
Cutting units raise, but will not stay
up.
Steering wheel is hard to turn.
Regular adjustments to steering
wheel are necessary because of dif-
ficulty of driving in a straight line.
Steering wheel will not return to the
neutral position.
Steering wheel can turn on its own.
Backlash results when turning steer-
ing wheel.
Rear wheel shimmies when the
steering wheel is turned.
Hydraulic System (Rev. I)
Possible Cause
Engine speed is too low.
Reservoir oil level is low.
Lift cylinder linkage is binding or broken.
Lift cylinder bushings bind.
Charge circuit pressure is low (see Charge Relief Valve (R4) Pres-
sure Test).
Implement relief valve (R5) is leaking or damaged (see Implement
Relief Valve (R5) Pressure Test).
Solenoid valve (S2) in hydraulic manifold is leaking or damaged.
Relief valve (R2) is stuck leaking or damaged (see Lower Cutting
Units Relief Valve (R2) Pressure Test).
Lift cylinders leak internally.
Spool in steering control valve is hung up (see Steering Control
Valve Test).
Gear pump (P2) is damaged (see Gear Pump (P2) Flow Test).
Hydraulic manifold solenoid valve (S4) leaks.
Lift cylinders leak internally.
Steering control valve has insufficient oil flow.
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 (see Steer-
ing Control Valve Test).
Spool and sleeve are sticking to steering control housing assembly
(see Steering Control Valve Test).
Leaf springs in steering control valve are broken or stuck.
Spool and sleeve are sticking to steering control housing assembly
(see Steering Control Valve Test).
Cardan shaft fork in steering control valve is worn or broken.
Leaf springs in steering control valve are worn or broken.
Splines on the steering column are worn.
Air is in the steering cylinder.
Mechanical connections to the wheel or wheel bearing are worn.
Page 4 - - 30 Greensmaster 3250--D