Service and Repair Manual
July 2019
Manifolds
74
S-
40 XC • S
-
45 XC • S
-
40 TraX •
S-45 TraX
Part No. 1286829GT
7-10
Valve Coils
How to Test a Coil
A properly functioning coil provides an
electromotive force which operates the solenoid
valve. Critical to normal operation is continuity
within the coil that provides this force field.
Since coil resistance is sensitive to temperature,
resistance values outside specification can
produce erratic operation. When coil resistance
decreases below specification, amperage
increases. As resistance rises above specification,
voltage increases.
While valves may operate when coil resistance is
outside specification, maintaining coils within
specification will help ensure proper valve function
over a wide range of operating temperatures.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
1 Tag and disconnect the wiring from the coil to
be tested.
2 Test the coil resistance.
Result: The resistance should be within
specification, plus or minus 30%.
Result: If the resistance is not within
specification, plus or minus 30%, replace the
coil.
Valve Coil Resistance
Specification
Note: The following coil resistance specifications
are at an ambient temperature of 68°F / 20°C. As
valve coil resistance is sensitive to changes in air
temperature, the coil resistance will typically
increase or decrease by 4% for each 18°F / 10°C
that your air temperature increases or decreases
from 68°F / 20°C.
Valve Coil Resistance Specification
Solenoid valve, 3 position 4 way, 10V DC
4Ω
schematic item ( BT)
Solenoid Valve, 2 position 3 way, 10V DC
4Ω
schematic items ( BU, BV, BX, and BZ)
Solenoid valve, 3 position 4 way, 10V DC
5Ω
schematic items (CD and CF)
Proportional solenoid valve, 12V DC
5Ω
schematic items( BI and CH)
Solenoid Valve, 2 position 3 way, 10V DC
6.8Ω
schematic item ( CC)
Solenoid Valve, 2 position 3 way, 12V DC
4.8Ω
(schematic item CE)
Summary of Contents for S-40 TRAX
Page 144: ...Service and Repair Manual July 2019 134 Electrical Schematic TCON ...
Page 147: ...July 2019 Service and Repair Manual 137 Electrical Schematic PCON ...
Page 148: ...Service and Repair Manual July 2019 138 Electrical Schematic Deutz 2 9 Models ...
Page 150: ...Service and Repair Manual July 2019 140 S 40 XC S 45 XC S 40 TraX S 45 TraX Part No 1286829GT ...
Page 152: ...Service and Repair Manual July 2019 142 Electrical Schematic Deutz 2011 Models ...
Page 153: ...July 2019 Service and Repair Manual 143 Electrical Schematic Perkins 404F Models ...
Page 156: ...Service and Repair Manual July 2019 146 Electrical Schematics Ford MSG425 Models ...
Page 159: ......