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 77
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
Daily, check hydraulic lines and hoses for leaks, kinked
lines, loose mounting supports, wear, loose fittings,
weather deterioration, and chemical deterioration.
Make all necessary repairs before operating.
Testing the Pressure in the
Hydraulic System
The test ports are used to test the pressure in the
hydraulic circuits. Contact your Toro Distributor for
assistance.
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.
g031625
Solenoid
PRV2
PRV1
PRV
S1
S2
g031621
N
FF
57
Function
Front mower circuit
Rear mower circuit
Lift/lower cutting decks
Lower cutting decks
Lower cutting decks