Traction Circuit (Closed Loop) Component Failure - Toro Greensmaster 3120 Service Manual

Traction Circuit (Closed Loop) Component Failure

Hydraulic System: General Information
The traction circuit of the Greensmaster 3120 machine is a closed loop circuit
which includes the piston (traction) pump and two (2) wheel motors. If a
component in the traction circuit should fail, unwanted material and contamination
from the damaged component will circulate throughout the traction circuit. This
contamination can damage other components in the circuit. The contamination
must be removed as soon as possible to prevent additional component failure.
The recommended method of removing contamination from the traction circuit
is to temporarily install a Toro high flow hydraulic filter into the traction circuit;
refer to High Flow Hydraulic Filter Kit (page
suspect, the filter should be installed before connecting hydraulic test gauges
to test traction circuit components or after replacing a failed traction circuit
component. The filter will ensure that contaminates are removed from the closed
loop traction circuit and thus, prevent additional component damage.
Once the Toro high flow hydraulic filter kit has been placed in the traction circuit,
raise and support the machine with the front wheels off the ground. Then,
operate the traction circuit to allow fluid flow throughout the circuit. The filter will
remove contamination from the traction circuit during operation. Because the
Toro high flow filter is bidirectional, 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. Refer to
the Closed-Loop Traction Circuit (page 4–76)
the Toro high flow hydraulic filter.
Note: If traction circuit contamination exists, the traction pump case drain could
allow contaminates to enter other hydraulic circuits on the machine.
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 the
components, the hydraulic tubes and the hydraulic hoses in the traction circuit. If
any debris remains in the traction circuit and the machine is operated, the debris
can cause additional circuit component failures.
4–29). If a traction circuit failure is
for additional information on using
Page 4–6
Filtering
Greensmaster 3120
17230SL Rev C