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Groundsmaster 4000--DPage 5 -- 20Electrical System
Hydraulic Valve Solenoids
Figure 30
1. 4WD manifold
2. LH PTO manifold
3. Traction manifold
4. Front PTO manifold
5. Fan drive manifold
6. RH PTO manifold
FRONT
RIGHT
1
2
3
4
5
6
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
connectorterminals.Theresistancefor allsolenoid coils
used on the Groundsmaster 4000--D should be approxi-
mately 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. Whentesting iscomplete,connectwireharness con-
nector to the solenoid.
Figure 31
1. Manifold (RH PTO manifold shown)
2. Valve solenoid
3. Solenoid connector
2
1
3