Toro Groundmaster 31900, Service Manual, Page: 54 / 355

Traction System Problems (continued)
Problem Possible Cause Corrective Action
The hydraulic fluid level in the hydraulic
tank is low (other hydraulic circuit
performance is affected as well). Adjust the hydraulic fluid level.
The traction pump bypass valve is open
or damaged. Close or replace the traction pump
bypass valve.
The traction pump charge relief valve is
leaking or damaged. Clean or repair the charge relief valve.
The traction pump relief valves are
leaking or damaged. Clean or repair the piston (traction)
pump relief valves.
The charge pressure is low (steering
and lift circuit performance is also
affected). Verify charge pressure; refer to Testing
the Traction Circuit – Charge Pressure
in the Hydraulic System chapter of this
manual.
The traction pump is worn or damaged. 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.
The wheel motor(s) is worn or
damaged. Verify wheel motor operation; refer to
Testing the Traction Circuit – Wheel
Motor Efficiency in the Hydraulic
System chapter of this manual.
No traction exists in either direction.
Note: If a traction circuit component
has internal wear or damage, it
is possible that the other traction
components are also damaged.
Troubleshooting: Traction System Problems Page 3–18 Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A