Toro Groundmaster Series Service Manual page 54

Traction System Problems (continued)
Problem
No traction exists in either direction.
Troubleshooting: Traction System Problems
Possible Cause
The hydraulic fluid level in the hydraulic
tank is low (other hydraulic circuit
performance is affected as well).
The traction pump bypass valve is open
or damaged.
The traction pump charge relief valve is
leaking or damaged.
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.
Page 3–18
Corrective Action
Adjust the hydraulic fluid level.
Close or replace the traction pump
bypass valve.
Clean or repair the charge relief valve.
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.
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A