Toro Groundsmaster 3280-D Service Manual page 110

Reverse Direction
Hydraulic System: Hydraulic Flow Diagrams
The traction circuit operates essentially the same in reverse as it does in the
forward direction. However, the flow through the circuit is reversed. Pushing
the bottom of the traction pedal rotates the variable displacement pump swash
plate in the hydraulic pump to create a flow of fluid. This fluid is directed to the
fixed displacement motor which turns the differential input shaft to drive the front
wheels in a reverse direction. The reverse traction pressure is limited to 32,495
kPa (4,713 psi) by the reverse traction relief valve located in the hydraulic pump.
The fluid flowing from the motor returns to the variable displacement pump and
is continuously pumped through the closed loop traction circuit as long as the
traction pedal is pushed.
The charge circuit functions the same in reverse as it does in the forward
direction.
Page 5–26 Groundsmaster ® 3280-D/3320
05138SL Rev B