Service Manual

Groundsmaster 360Hydraulic System Page 4 − 4

Traction Circuit Component Failure

The traction circuit on Groundsmaster 360 machines is

a closed loop system that includes the dual piston (trac-

tion) pump and either two (2) or four (4) wheel motors.

If a component in the traction circuit should fail, debris

and contamination from the failed component will circu-

late throughout the traction circuit. This contamination

can damage other components in the circuit so it must

be removed to prevent additional component failure.

The recommended method of removing traction circuit

contamination would be to temporarily install the Toro

high flow hydraulic filter (see Special Tools in this chap-

ter) into the circuit. This filter should be used when con-

necting hydraulic test gauges in order to test traction

circuit components or after replacing a failed traction cir-

cuit component (e.g. traction (piston) pump or wheel

motor). The filter will ensure that contaminates are re-

moved from the closed loop and thus, do not cause addi-

tional component damage.

Once the Toro high flow hydraulic filter kit has been

placed in the circuit, raise and support the machine with

all drive wheels off the ground. Then, operate the trac-

tion circuit to allow oil flow throughout the circuit. The fil-

ter will remove contamination from the traction circuit

during operation. Because the Toro high flow filter is bi−

directional, the traction circuit can be operated in both

the forward and reverse direction. The filter should be

removed from the machine after contamination has

been removed from the traction circuit. See Filtering

Closed−Loop Traction Circuit in the Service and Repairs

section of this chapter for additional information on us-

ing the Toro high flow hydraulic filter.

The alternative to using the Toro high flow hydraulic filter

kit after a traction circuit component failure would be to

disassemble, drain and thoroughly clean all compo-

nents, tubes and hoses in the traction circuit. If any de-

bris remains in the traction circuit and the machine is

operated, the debris can cause additional circuit compo-

nent failure.