Toro 4100-D service manual Hydraulic Valve Solenoids

Hydraulic Valve Solenoids

	3	1
RIGHT	5
FRONT
		2
	4

Figure 32

1.	4WD manifold	3.	RH deck manifold	5. Fan drive manifold
2.	LH deck manifold	4.	Front deck manifold

There are several hydraulic valve solenoids on the Groundsmaster 4100--D (Fig. 32). Testing of these sole- noids can be done with the solenoid on the hydraulic valve.

Testing

NOTE: Prior to taking small resistance readings with a digital multimeter, short the meter test leads together. The meter will display a small resistance value (usually

0.5ohms or less). This resistance is due to the internal resistance of the meter and test leads. Subtract this val- ue from from the measured value of the component you are testing.

1.Make sure engine is off. Disconnect wire harness connector from the solenoid (Fig. 33).

2.Measure resistance between the two (2) solenoid connector terminals. The resistance for any solenoid coil used on the Groundsmaster 4100--D should be approximately 8.7 ohms.

3.Install new solenoid if necessary. Torque solenoid nut to 5 ft--lb (6.7 N--m). Over--tightening may damage the solenoid or cause the cartridge valve to malfunction.

4.When testing is complete, connect wire harness con- nector to the solenoid.

1

2

3

Figure 33

1.Manifold (RH deck manifold shown)

2.Valve solenoid

3.Solenoid connector

Electrical System Page 5 -- 22 Groundsmaster 4100--D