Traction Circuit Problems (Greenspro 1260) - Toro GreensPro 1240 Service Manual

Traction Circuit Problems (GreensPro 1260)

Problem
The traction response is sluggish.
The traction system operates in one
direction only.
Troubleshooting: Traction Circuit Problems (GreensPro
1260)
Possible Cause
The hydraulic fluid is very cold.
The hydraulic fluid level in the hydraulic
tank is low.
The hydraulic pump tow (bypass) valve
is open or damaged.
The charge pressure is low.
One or more orifice or screen in the
hydraulic pump is partially obstructed
or damaged.
A hydraulic pump relief valve is leaking
or damaged.
The hydraulic pump is worn or
damaged.
The hydraulic drive motor 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.
The motion control linkage is incorrectly
adjusted, disconnected, binding, or
damaged.
The hydraulic pump relief valves are
leaking or damaged.
The hydraulic pump is worn or
damaged.
Page 3–6
Corrective Action
Allow the hydraulic fluid to warm by
safely operating the machine at rest.
Adjust the hydraulic fluid level.
Close or replace the hydraulic pump
bypass valve.
Verify charge pressure; refer to
Hydraulic Pump Charge Pressure Test
in Chapter 5 – Hydraulic System.
Clean or repair the hydraulic pump
passages.
Verify hydraulic pump relief valve
operation; refer to Hydraulic Pump
Flow and Relief Pressure Test in
Chapter 5 – Hydraulic System.
Verify hydraulic pump operation; refer
to Hydraulic Pump Flow and Relief
Pressure Test in Chapter 5 – Hydraulic
System.
Repair or replace the hydraulic drive
motor.
Verify motion control operation and
repair or adjust as necessary; refer
to Adjusting the Control Pedal Return
to Neutral Mechanism in Chapter 5 –
Hydraulic System.
Verify hydraulic pump relief valve
operation; refer to Hydraulic Pump
Flow and Relief Pressure Test in
Chapter 5 – Hydraulic System.
Verify hydraulic pump operation; refer
to Hydraulic Pump Flow and Relief
Pressure Test in Chapter 5 – Hydraulic
System.
GreensPro
14211SL Rev A
™ 1240/1260