Hydraulic Valve Solenoids - Toro Groundsmaster 4000-D Service Manual

Hydraulic Valve Solenoids

RIGHT
FRONT
4
1. 4WD manifold
2. LH PTO manifold
There are several hydraulic valve solenoids on the
Groundsmaster 4000--D (Fig. 30). Testing of these sole-
noids can be done with the solenoid on the hydraulic
valve.
Testing
1. Make sure engine is off. Disconnect wire harness
connector from the solenoid (Fig. 31).
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
0.5 ohms 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.
2. Measure resistance between the two (2) solenoid
connector terminals. The resistance for all solenoid coils
used on the Groundsmaster 4000--D should be approxi-
mately 8.7 ohms.
Electrical System
5
Figure 30
3. Traction manifold
4. Front PTO manifold
Page 5 - - 20
6
5. Fan drive manifold
6. RH PTO manifold
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.
2
Figure 31
1. Manifold (RH PTO manifold shown)
2. Valve solenoid
3. Solenoid connector
1
2
3
1
3
Groundsmaster 4000--D