Hydraulic Solenoid Valve Coils
Numerous hydraulic solenoid valve coils are used on
the hydraulic control manifolds of Groundsmaster
5. If solenoid coil resistance is incorrect, replace sole-
noid (see Hydraulic Solenoid Valve Coil Removal and
Installation in the Service and Repairs section of this
chapter).
4500--D
and 4700--D machines. When energized by the
TEC controller, these coils provide hydraulic circuit con-
trol.
6.
After testing is completed, connect wire harness
Two (2) different solenoid valve coils are used on the
connector to the solenoid.
4500--D
and4700--D.Acoilcanbeidentifiedbymeasur-
ing it’s height and diameter (Fig. 38). Testing of the coils
can be done with the coil remaining on the hydraulic
valve.
NOTE: To assist in troubleshooting, identical solenoid
coils can be exchanged. If the problem follows the ex-
changed coil, a problem with the coil likely exists. If the
problem remains unchanged, something other than the
solenoid coil is the problem source (e.g. switch, circuit
wiring, hydraulic problem).
COIL
DIAMETER
Testing
1.
decks, stop engine, engage parking brake and remove
key from the ignition switch.
Park machine on a level surface, lower cutting
2.
Identify coil by measuring the coil diameter and coil
height (Fig. 38).
Locate hydraulic valve solenoid coil to be tested.
COIL
HEIGHT
3.
Disconnect wire harness connector from coil.
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
Figure 38
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
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
1.84
in
1.96 in
(49.9 mm)
7.1 ohm
(46.7
mm)
1.41
in
1.43 in
(35.8 mm)
8.8 ohm
(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).
Electrical System
Page 5 -- 28
Groundsmaster 4500--D/4700--D
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30857, Toro Groundsmaster 30858, Toro Groundsmaster 4500 D, Toro Groundsmaster 4700 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)