Traction Circuit Problems - Toro Reelmaster 5010- H Service Manual

Traction Circuit Problems

Problem
Neutral is difficult to find or unit oper-
ates in one direction only
Traction response is sluggish
No traction in either direction
Single wheel motor turns while un-
loaded, but slows down or stops
when load is applied
Hydraulic System
Possible Cause
Traction control linkage is misadjusted, disconnected, binding or
damaged.
Piston (traction) pump check relief valve is not seating or is dam-
aged (NOTE: Piston (traction) pump check relief valves for forward
and reverse are identical and can be reversed for testing pur-
poses).
Piston (traction) pump is worn or damaged.
Charge pressure is low.
Hydraulic oil is very cold.
Parking brake is dragging or binding.
Piston (traction) pump bypass valve is not seated.
Flushing valve in piston (traction) pump is not seating or is dam-
aged.
Piston (traction) pump charge relief valve is not seating or is dam-
aged.
Piston (traction) pump check relief valve is not seating or is dam-
aged (NOTE: Check relief valves for forward and reverse are iden-
tical and can be reversed for testing purposes).
Piston (traction) pump is worn or damaged.
Parking brake is dragging or binding.
Traction control linkage is misadjusted, disconnected, binding or
damaged.
Oil level in hydraulic reservoir is low (other hydraulic systems af-
fected as well).
Piston (traction) pump bypass valve is loosened.
Flushing valve in piston (traction) pump is not seating or is dam-
aged.
Piston (traction) pump check valve is not seating or is damaged.
Charge pressure is low.
Wheel motor(s) and/or piston (traction) pump are worn or damaged
(NOTE: If a traction circuit component has internal wear or dam-
age, it is possible that other traction components are also dam-
aged).
Wheel motor is worn or damaged.
(NOTE: If a traction circuit component has internal wear or dam-
age, it is possible that other traction components are also dam-
aged)
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