Toro Multi Pro 1750 Service Manual page 65

Problem
Steering inoperative or sluggish
One of the spray booms does not raise or lower.
Multi Pro 1750
Possible Cause
Engine speed is too low.
Oil level in transaxle is incorrect.
Steering pitman arm pivot is not greased and binding.
Steering cylinder is binding.
Steering relief valve is stuck open.
Steering control valve is worn or damaged.
Pulley key (either on engine or gear pump) is sheared.
Steering cylinder leaks internally.
Hydraulic pump is worn or damaged (boom lift affected
as well).
Affected spray boom pivot is worn, binding or
damaged.
Boom lift control manifold solenoid coil (S2 or S3) or
circuit wiring for affected boom has electrical problem
(see Chapter 5 − Electrical System in this manual).
Boom lift control manifold solenoid valve for affected
boom (S2 or S3) is sticking or damaged.
Boom lift control manifold check valve for affected
boom (PC1 or PC2) is sticking or damaged.
Boom lift control manifold orifice for affected boom is
plugged or damaged.
Affected lift cylinder is worn or damaged.
Page 4 − 17 Hydraulic System