Traction Circuit (Closed Loop) Component Failure - Toro Groundsmaster 360 Service Manual

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
Hydraulic System
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.
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