Troubleshooting - Toro Reelmaster 5500-D Service Manual

Troubleshooting

The charts that follow contain information to assist in
troubleshooting. There may possibly be more than one
cause for a machine malfunction.
Problem
Steering wander
Poor or no return (recovery)
Shimmy
High steering effort in one direction
High steering effort in both directions
Steering wheel lash (free movement)
Excessive heat in hydraulic system
Reelmaster 5500-D
Refer to the Testing section of this Chapter for precau-
tions and specific test procedures.
Possible Cause
Tire pressure incorrect or unequal left to right.
Loose or worn steering linkage.
Improperly adjusted or worn rear wheel bearings.
Rear wheels out of alignment; toe−in/toe−out.
Low hydraulic system pressure (steering circuit).
Internal leakage of steering cylinder.
Improper rear wheel alignment; toe−in.
Steering linkage binding.
Low tire pressure.
Steering column binding or out of alignment.
Low hydraulic system pressure (steering circuit).
Steering linkage loose, worn or out of adjustment.
Wheel bearings out of adjustment.
Air in hydraulic system.
Internal leakage of steering cylinder.
Low hydraulic system pressure.
Excessive heat causing steering valve plate valve to stick
(See Excessive Heat in this section).
Low hydraulic fluid level.
Low flow or pressure from hydraulic pump.
Steering linkage binding.
Restriction in hydraulic return line.
Steering wheel loose on column.
Steering linkage loose or worn.
Steering valve loose at mounting.
Air in hydraulic system.
Internal leakage in hydraulic cylinder.
Undersized replacement hose or tube line.
Kinked or severely bent hose or tube line.
Restricted oil cooler.
Restricted re-centering of steering valve control valve plate.
Page 7 - 5 Steering and Brakes