Checking The Hydraulic Lines And Hoses; Testing The Pressure In The Hydraulic System; Hydraulic Valve Solenoid Functions - Toro Groundsmaster 4300-D Operator's Manual

Figure 91
3. Turn the key in the ignition switch to the O
position, start the engine, and let it run for about
2 minutes to purge air from the system.
4. Turn the key in the ignition switch to the O
position and check for leaks.
Checking the Hydraulic
Lines and Hoses
Service Interval: Before each use or daily
Make all necessary repairs before operating.
g194208
WARNING
Hydraulic fluid escaping under pressure can
penetrate skin and cause injury.
• Make sure that all hydraulic-fluid hoses
and lines are in good condition and all
hydraulic connections and fittings are tight
before applying pressure to the hydraulic
system.
• Keep your body and hands away from
pinhole leaks or nozzles that eject
high-pressure hydraulic fluid.
• Use cardboard or paper to find hydraulic
leaks.
• Safely relieve all pressure in the hydraulic
system before performing any work on the
hydraulic system.
• Get immediate medical help if fluid is
injected into skin.
g031621
Testing the Pressure in the
Hydraulic System
N
The test ports are used to test the pressure in the
hydraulic circuits. Contact your authorized Toro
distributor for assistance.
FF
Hydraulic Valve Solenoid
Functions
Use the list below to identify and describe the different
functions of the solenoids in the hydraulic manifold.
Each solenoid must be energized to allow function
to occur.
Solenoid
PRV2
PRV1
PRV
S1
S2
63
Function
Front mower circuit
Rear mower circuit
Lift/lower cutting decks
Lower cutting decks
Lower cutting decks