Traction Circuit Problems - Toro Groundsmaster 360 Service Manual

Traction Circuit Problems

Problem
Traction response is sluggish.
Neutral is difficult to find.
No traction exists in either direction
and engine speed remains constant.
Wheel motor will not turn and engine
speed reduces when traction pedal is
pressed..
Wheel motor will not hold load in
neutral.
NOTE: Machine may not be
completely stationary if parked on an
incline without the parking brake
engaged.
Hydraulic System
Possible Causes
Transmission bypass valve(s) is open or defective.
Brake is dragging or binding.
Hydraulic oil is very cold.
Transmission check valve, relief valve and/or flushing valve is leaking.
Charge pressure is low.
Transmission or wheel motor(s) is worn or damaged.
(NOTE: If one traction circuit component has internal wear or damage,
it is possible that other traction components are also damaged.)
External control linkage is misadjusted, disconnected, binding or
damaged.
Orifice in transmission check valve(s) is plugged.
Transmission is worn or damaged.
Oil level in hydraulic tank is low.
Transmission bypass valves are both open.
Charge pressure is low.
Engine flywheel coupling is damaged.
Transmission or wheel motor(s) is worn or damaged.
(NOTE: If one traction circuit component has internal wear or damage,
it is possible that other traction components are also damaged.)
Transmission bypass valve(s) is open.
Transmission or wheel motor is worn or damaged.
(NOTE: If one traction circuit component has internal wear or damage,
it is possible that other traction components are also damaged.)
Make up fluid from charge pump is not available.
Check valves in transmission are damaged.
On 4WD machine, PD1 or PD2 cartridge in CrossTrax
manifold is leaking or is damaged.
Valve plate(s) in transmission is worn or damaged.
Cylinder block assembly in transmission is worn or damaged.
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TM
AWD control
Groundsmaster 360