Traction Circuit Problems - Toro Groundsmaster 3280-D Service Manual

Traction Circuit Problems

Problem
Traction jerky when starting.
The traction response is sluggish.
Neutral is difficult to find or unit operates in 1 direction only.
No traction exists in either direction and the engine speed
remains constant.
Groundsmaster ® 3280-D/3320
05138SL Rev B
• Friction wheel on traction pedal out of adjustment or worn
(except 3280-D Models 30344 and 30345).
• The traction control linkage is incorrectly adjusted,
disconnected, binding, or damaged.
• The hydrostat/hydraulic pump check valve is not seating or
is damaged.
• The hydraulic pump bypass valve is open or damaged
(3280-D Models 30344 and 30345).
• The brake is dragging or binding.
• The brakes are not released.
• The charge pressure is low.
• The hydraulic fluid is very cold.
• The hydrostat/hydraulic pump check valve is not seating or
is damaged.
• The hydrostat/hydraulic pump is worn or damaged.
Note: If 1 traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
• The traction control linkage is incorrectly adjusted,
disconnected, binding, or damaged.
• The hydrostat/hydraulic pump check valve is not seating or
is damaged.
• The hydrostat/hydraulic pump is worn or damaged.
• The brakes are not released.
• The hydraulic-fluid level in the reservoir (front axle) is low.
• The hydraulic pump bypass valve is open (3280-D Models
30344 and 30345).
• The hydrostat/hydraulic pump check valve is not seating or
is damaged.
• The charge pressure is low.
• The transmission/hydraulic pump driveshaft or key
damaged (the steering and lift circuits affected as well).
• The hydrostat/hydraulic pump is worn or damaged.
• The front axle is damaged.
Note: If 1 traction circuit component has internal wear or
damage, it is possible that the other traction components
are also damaged.
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Possible Causes
Hydraulic System: Troubleshooting