Hydraulic Valve Solenoids
1
6
5
RIGHT
FRONT
2
4
3
Figure 30
1.
2.
4WD manifold
LH PTO manifold
3.
4.
Traction manifold
Front PTO manifold
5.
6.
Fan drive manifold
RH PTO manifold
There are several hydraulic valve solenoids on the
Groundsmaster 4000--D (Fig.30). Testingofthesesole-
noids can be done with the solenoid on the hydraulic
valve.
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 tomalfunction.
4.
Whentestingiscomplete,connectwireharnesscon-
Testing
nector to the solenoid.
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
1
2
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.
3
2.
Measure resistance between the two (2) solenoid
connectorterminals.Theresistanceforallsolenoidcoils
usedontheGroundsmaster 4000--Dshould beapproxi-
mately 8.7 ohms.
Figure 31
1.
2.
3.
Manifold (RH PTO manifold shown)
Valve solenoid
Solenoid connector
Electrical System
Page 5 -- 20
Groundsmaster 4000--D
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