Toro Reelmaster 5510 Series, Service Manual

Page: 127 / 662

Traction Circuit Component Failure
The traction circuit of the Reelsmaster 5010 series machines is a closed loop
system that includes the piston (traction) pump and 2 front wheel motors (4
wheel motors on machines equipped with CrossTrax AWD). If a component
failure occurs in the traction circuit (e.g., traction (piston) pump or wheel motor),
unwanted material and contamination from the damaged component will
circulate throughout the traction circuit. This contamination can damage other
components in the circuit, so remove the contamination to prevent additional
component failure.
The recommended method to remove contamination from the traction circuit is
to temporarily install a Toro high flow hydraulic-fluid filter into the circuit; refer
to
Special Tools (page 6–44) . Use a high flow hydraulic-fluid filter when you
connect hydraulic test gauges in order to test the traction circuit components or
after you replace a failed traction circuit component (e.g., traction (piston) pump
or wheel motor). Using a high flow hydraulic-fluid filter will remove contaminates
from the hydraulic fluid in the traction circuit, thereby preventing additional
component damage.
After you have installed the Toro high flow hydraulic-fluid filter in the traction
circuit, raise and support the machine with all the drive wheels off the ground.
Then, operate the traction circuit to allow the hydraulic fluid to flow through the
circuit. The filter removes contamination from the traction circuit during the circuit
operation. Because the Toro high flow filter is bi-directional, the traction circuit
can be operated in both the forward and reverse direction. When you are certain
that the filter has removed the contaminates from the hydraulic fluid of the traction
circuit, remove the filter. Refer to
Filtering the Closed-Loop Traction Circuit (page
6–149) for additional information on using the Toro high flow hydraulic-fluid filter.
The alternative method to remove contamination from the traction circuit is to
disassemble the entire traction circuit, drain the hydraulic fluid, and clean all the
components, tubes, and hoses in the traction circuit. Operating the machine
with contaminants in the traction circuit could cause additional damage to
components of the traction circuit.
Note: The traction pump case drain could allow traction circuit contamination to
contaminate other hydraulic circuits on the machine.
Reelmaster ® 5410/5510/5610 Series Page 6–9 Hydraulic System: General Information
15216SL Rev C