Relieving Hydraulic System Pressure; Traction Circuit Component Failure - Toro Reelmaster 5210 Service Manual

Relieving Hydraulic System Pressure

Before disconnecting or performing any work on the hy-
draulic system, all pressure in the hydraulic system
must be relieved. Park machine on a level surface, lower
cutting units fully, stop engine and engage parking
brake.
To relieve hydraulic pressure in traction circuit, move
traction pedal to both forward and reverse directions. To
relieve hydraulic pressure in steering circuit, rotate
steering wheel in both directions.

Traction Circuit Component Failure

The traction circuit on Reelmaster 5010 series ma-
chines is a closed loop system that includes the piston
(traction) pump and two (2) wheel motors (4 wheel mo-
tors on machines equipped with optional CrossTrax
AWD kit). If a component in the traction circuit should
fail, debris and contamination from the failed component
will circulate throughout the traction circuit. This con-
tamination can damage other components in the circuit
so it must be removed to prevent additional component
failure.
If a component failure occurs in the traction circuit, it is
recommended that the entire traction circuit be disas-
sembled, drained and thoroughly cleaned to ensure that
all contamination is removed from the circuit. If any de-
bris remains in the traction circuit and the machine is op-
erated, the debris can cause additional component
failure.
An alternative method of removing traction circuit con-
tamination would be to temporarily install a high pres-
sure hydraulic oil filter (see Special Tools) into the circuit.
The filter should be used when connecting hydraulic test
gauges in order to test traction circuit components or af-
ter replacing a failed traction circuit component (e.g.
traction (piston) pump or wheel motor). The filter will en-
sure that contaminates are removed from the closed
loop and thus, do not cause additional component dam-
age.
Hydraulic System (Rev. C)
To relieve hydraulic pressure in lift circuit, start engine
and fully lower the cutting units. Turn key switch to OFF
and remove key from the ignition switch.
System pressure in cutting circuit is relieved when the
cutting units are disengaged.
Once the filter has been placed in the circuit, operate the
traction circuit to allow oil flow through the circuit. The fil-
ter will remove contamination from the traction circuit
during circuit operation. The filter can be removed from
TM
the machine after contamination has been removed
from the traction circuit.
IMPORTANT: When operating the traction system with
the high pressure filter installed, make sure that flow is
always directed through the filter before entering a re-
placed component (e.g. do not press the traction pedal
in the reverse direction if the filter is placed for forward
direction flow). If flow is reversed, debris from the filter
will re--enter the traction circuit.
NOTE: The traction pump case drain could allow trac-
tion circuit contamination to contaminate other hydraulic
circuits on the machine.
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