Traction System Problems - Toro Groundmaster Series Service Manual

Traction System Problems

Problem
The traction response is sluggish.
The machine travels too far before
stopping when the traction pedal is
released.
Neutral is difficult to find or unit
operates in one direction only (forward
or reverse).
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
Possible Cause
The hydraulic fluid is very cold.
The hydraulic fluid level in the hydraulic
tank is low.
The traction control linkage is
incorrectly adjusted, binding, or
damaged.
The traction pump bypass valve is open
or damaged.
Engine speed is low.
The traction pump relief valves are
leaking or damaged.
The charge pressure is low (steering
and lift circuit performance is also
affected).
The traction pump is worn or damaged.
The wheel motor(s) is worn or
damaged.
Note: If a traction circuit component
has internal wear or damage, it
is possible that the other traction
components are also damaged.
Traction pedal linkage out of
adjustment, restricted, or damaged.
The traction pump bypass valve is open
or damaged.
The traction pump relief valves are
leaking or damaged.
The traction pump is worn or damaged.
Page 3–17
Corrective Action
Allow the hydraulic fluid to warm by
safely operating the machine at rest.
Adjust the hydraulic fluid level.
Inspect traction linkage operation and
service or adjust if necessary.
Close or replace the traction pump
bypass valve.
Increase the engine speed.
Clean or repair the piston (traction)
pump relief valves.
Verify charge pressure; refer to Testing
the Traction Circuit – Charge Pressure
in the Hydraulic System chapter of this
manual.
Verify traction pump operation; refer
to Testing the Traction Circuit – Piston
(traction) Pump (P1) Flow and Relief
Pressure Test in the Hydraulic System
chapter of this manual.
Verify wheel motor operation; refer to
Testing the Traction Circuit – Wheel
Motor Efficiency in the Hydraulic
System chapter of this manual.
Inspect traction linkage operation and
service or adjust if necessary.
Close or replace the traction pump
bypass valve.
Clean or repair the piston (traction)
pump relief valves.
Verify traction pump operation; refer
to Testing the Traction Circuit – Piston
(traction) Pump (P1) Flow and Relief
Pressure Test in the Hydraulic System
chapter of this manual.
Troubleshooting: Traction System Problems