Traction Circuit Component Failure - Toro Field Pro 6040 Service Manual

Traction Circuit Component Failure

Hydraulic System: General Information
The traction circuit for Field Pro 6040 machines consists of 2 closed loop circuits
(one for each rear wheel) with a shared charge circuit. Each closed loop circuit
includes its own hydraulic pump and hydraulic wheel motor. If a component
in the traction circuit should fail, unwanted material and contamination from
the damaged component will circulate throughout that traction circuit. This
contamination can damage other components in that circuit. The contamination
must be removed as soon as possible to prevent additional component failure.
The recommended method to remove contamination from the traction circuit
is to temporarily install a Toro bidirectional high flow hydraulic-fluid filter into
the circuit; refer to Bidirectional High Flow Hydraulic Filter Kit (page
traction circuit failure is 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. Refer to Filtering the Closed-loop Traction Circuit (page 5–51)
additional information on using the Toro high flow hydraulic filter.
Note: If traction circuit contamination exists, the traction pump case drains could
allow contaminates to enter the hydraulic reservoir.
The alternative to using the Toro bidirectional high flow hydraulic filter kit after a
traction circuit component failure would be to disassemble, drain and thoroughly
clean all the components, the hydraulic reservoir, and the hydraulic tubes and
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.
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2–16). If a
for
Field Pro® 6040
22267SL Rev A