General Information; Operator's Manual; Relieving Hydraulic System Pressure; Towing Traction Unit - Toro Groundsmaster 5900 Series Service Manual

General Information

Operator's Manual

Relieving Hydraulic System Pressure

Towing Traction Unit

Groundsmaster ® 5900 & 5910
16227SL Rev B
The Operator's Manual provides information regarding the operation, general
maintenance and maintenance intervals for your Groundsmaster machine. Refer
to that publication for additional information when servicing the machine.
Before disconnecting or performing any work on the hydraulic system, all
pressure in the hydraulic system must be relieved. Park machine on a level
surface, lower cutting decks fully, disengage PTO and stop engine. Remove key
from key switch.
System pressure in mow circuit is relieved when the cutting decks are
disengaged.
To relieve hydraulic pressure in steering circuit with engine not running, rotate
steering wheel in both directions.
To relieve hydraulic pressure in lift circuit, make sure that engine is not running
and have operator seat occupied. Turn key switch to RUN, depress each of the
deck lift switches to the deck lower position and then release switch. Return key
switch to the OFF position after all lift switches have been depressed.
To relieve hydraulic pressure in traction circuit, turn key switch to ON (engine not
running) and depress traction pedal to both forward and reverse directions. Turn
key switch to OFF after relieving traction circuit pressure.
After all hydraulic system pressures have been relieved, remove key from key
switch.
g287711
1. Piston pump
2. Forward relief valve
If towing limits are exceeded, severe damage to the piston (traction)
pump may occur.
Figure 30
3. Reverse relief valve
IMPORTANT
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Hydraulic System: General Information