Leak Detector Float Switch; Leak Detector Solenoid Valve - Toro Greensmaster 3150 Service Manual

Leak Detector Float Switch

The leak detector float switch closely monitors the hy-
draulic fluid level in the main hydraulic tank. The switch
contacts are open when the float is in the raised position,
and closed when the float is in the lowered position.
1. If the float switch is connected to the main harness,
remove hydraulic tank cap and screen from filler neck of
hydraulic tank. Turn ignition switch to On (do not start
the engine). Insert a clean rod or screw driver into filler
neck and gently push down on switch float. Alarm should
sound after a one second time delay.
2. If the float switch is removed or disconnected from
the main harness, connect a continuity tester across the
float switch wire terminals. Current should flow across
the terminals only when the float is pushed down. There
should be no current flow across the terminals when the
float is in the raised position.

Leak Detector Solenoid Valve

The leak detector solenoid valve is a normally open
valve that allows hydraulic fluid to flow from the auxiliary
tank to the main hydraulic tank while the ignition is Off.
This feature fills the main hydraulic tank with fluid from
the auxiliary tank prior to starting the unit. The valve
closes when the ignition is On and during unit operation.
1. Disconnect the wiring connector at the valve sole-
noid.
2. Connect 12 vdc power across the solenoid termi-
nals. The valve spool should retract completely.
3. If valve does not retract smoothly or does not retract
completely, replace or rebuild the valve (see Solenoid
Operated Cartridge Valves in this chapter of this manu-
al).
4. To check the valve supply power, set the ignition
switch to On (do not start the engine). Connect a DC
voltmeter across the main harness leads for the sole-
noid valve, 12 volts should be present.
Electrical System
1
1. Main hydraulic tank
1
1. Main hydraulic tank
2. Valve body
Page 5 – 16
2
Figure 20
2. Float switch
2
3
Figure 21
3. Valve spool
4. Solenoid
Greensmaster 3150
4