Traction Circuit Component Failure - Toro Groundsmaster 5900 Series Service Manual

Traction Circuit Component Failure

Groundsmaster ® 5900 & 5910
16227SL Rev B
The traction circuit on Groundsmaster 5900 and 5910 machines is a closed loop
system that includes the piston (traction) pump and four (4) wheel motors. If a
component in the traction circuit should fail, debris and contamination from the
failed component will circulate 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
(page 2–15)) into the traction circuit. This filter should be used when connecting
hydraulic test gauges in order to test traction circuit components or after
replacing a failed traction circuit component (e.g. traction (piston) pump or wheel
motor). The filter will ensure that contaminates are removed from the closed loop
and thus, do not cause additional component damage.
To prevent damage to the high flow hydraulic filter during use on a
Groundsmaster 5900 or 5910, keep engine speed below 2200 RPM.
Higher engine speeds may allow excessive hydraulic flow to the filter.
Once the Toro high flow hydraulic filter kit has been placed in the circuit, raise
and support the machine with all wheels off the ground (see
(page 1–6)). Then, operate the traction circuit to allow oil 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. See Filtering Closed−Loop Traction Circuit (page 5–81)
additional information on using 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
components, hydraulic tubes and 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 failure.
IMPORTANT
Page 5–5
Special Tools
Jacking Instructions
Hydraulic System: General Information
for