Solenoid Valve Coil
The hydraulic system on the Topdresser 2500 uses a
solenoid valve coil on the hydraulic control manifold at
port S1 (Fig. 8 and 9). The coil is energized when the
control handle switch is in the ON position.
HYDRAULIC MANIFOLD FROM MACHINE
WITH SERIAL NUMBER BELOW 240000000
2
1
NOTE: If the Topdresser 2500 is equipped with the op-
tional brake kit, a second solenoid valve coil will be in-
cluded on the hydraulic control manifold at port S2.
Testing
NOTE: The solenoid does not have to be removed from
the cartridge valve for testing.
FRONT
1.
Make sure the Topdresser trailer wire harness is un-
plugged from battery harness.
Figure 8
2.
wire harness connector.
Unplug solenoid valve coil electrical connector from
1.
Hydraulic manifold
2. Solenoid coil (S1)
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the test leads together. The me-
ter will display a small resistance value (usually 0.5
ohms or less). This resistance is due to the internal re-
sistance of the meter and test leads. Subtract this value
from from the measured value of the component you are
testing.
HYDRAULIC MANIFOLD FROM MACHINE
WITH SERIAL NUMBER ABOVE 240000000
1
2
3.
terminals. Resistance of the solenoid coil should be
Measure resistance between the two coil connector
approximately 10.4 ohms.
4.
Valve Coil in the Service and Repairs section of this
chapter.
If solenoid coil needs replacement, see Solenoid
FRONT
5.
noid valve coil.
Reconnect harness electrical connector to the sole-
Figure 9
2.
1.
Hydraulic manifold
Solenoid coil (S1)
6.
Connect trailer wire harness to battery harness.
Topdresser 1800 & 2500
Page 4 – 7
Electrical System
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