Testing
1.
decks, stop engine, engage parking brake and remove
key from the ignition switch.
Park machine on a level surface, lower cutting
2.
45).
Locatehydraulicvalvesolenoidcoiltobetested(Fig.
Disconnect wire harness connector from coil.
3.
the coil diameter and coil height (Fig. 46).
Identify coil resistance specification by measuring
COIL
DIAMETER
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.
COIL
HEIGHT
4.
Using a multimeter (ohms setting), measure resis-
tance between the two (2) connector terminals on the
solenoid valve coil. The correct resistance for the sole-
noid coil is identified below:
COIL
DIAMETER
COIL
HEIGHT
COIL
RESISTANCE
Figure 46
1.84
in
1.96 in
7.1 ohm
8.8 ohm
(46.7
mm)
(49.9 mm)
1.41
in
1.43 in
(36.3 mm)
(35.8
mm)
NOTE: Solenoid coil resistance should be measured
with solenoid atapproximately 68oF(20oC).Resistance
may be slightly different than listed at different tempera-
tures. Typically, a failed solenoid coil will either be
shorted (very low or no resistance) or open (infinite re-
sistance).
5
ft--lb
(6.7 N--m)
2
3
5.
noid:
If solenoid coil resistance is incorrect, replace sole-
4
A. Remove nut securing solenoid to the cartridge
1
valve. Carefully slide solenoid off the valve.
TRACTION
B. Install new solenoid coil to the cartridge valve.
Install and torque nut 5 ft--lb (6.7 N--m). Over--tight-
ening may damage the solenoid coil or cause the
cartridge valve to malfunction.
MANIFOLD SHOWN
Figure 47
1.
2.
Hydraulic manifold
Cartridge valve
3.
4.
Solenoid coil
Nut
6.
After testing is completed, connect wire harness
connector to the solenoid.
Groundsmaster 4000--D/4010--D
Page 5 -- 37
Electrical System
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
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