1457275 Truck Solenoid Valve

  Common failure cases and solutions:

  Fault one: Solenoid valve coil short circuit or open circuit detection method: first use a multimeter to measure its on-off, the resistance value is close to zero or infinity, that indicates that the coil short circuit or open circuit. If the measurement of its resistance is normal (probably tens of ohms), it does not mean that the coil must be good (I once measured a Solenoid Valve coil resistance of about 50 ohms, but the solenoid valve can not operate, everything is normal after replacing the coil), please carry out the following final test: find a small screwdriver and place it near the metal rod worn in the solenoid valve coil, and then energize the solenoid valve, if it feels magnetic, then the solenoid valve coil is good, otherwise it is bad. Fault solution: replace the solenoid valve coil. Fault two: There is a problem with the solenoid valve plug/socket If the solenoid valve is the kind with a plug/socket, there may be a problem with the metal reed of the socket, a problem with the wiring on the plug (such as connecting the power cord to the grounding wire) and other reasons that cannot send the power to the coil. It is best to make a habit of screwing the fixing screw after inserting the plug into the socket, and screwing on the fixing nut on the coil after the spool stem. If the plug of the solenoid coil is equipped with a light-emitting diode power indicator, then the DC power supply must be connected when the solenoid valve is driven, otherwise the indicator will not light up. In addition, do not swap power plugs with light-emitting diode power indications of different voltage levels, as this will cause the LEDs to be burned out/the power supply (replace with a plug with a lower voltage level) to be short-circuited or the LEDs emit very weakly. Fault resolution: correct wiring errors, repair or replace plugs and sockets. Fault three: solenoid valve spool problem In the case of normal pressure of the medium passed by the solenoid valve, press the red manual button of the solenoid valve, and the solenoid valve has no reaction (the pressure medium does not change on and off), indicating that the spool must be bad. Fault solution: check whether there is a problem with the medium, such as whether there is a lot of water in the compressed air (sometimes the oil-water separator does not play a very large role, especially when the pipeline design is poor, the compressed air leading to the solenoid valve will have a lot of water), whether there are many impurities in the liquid medium. Then remove water or impurities from the solenoid valve and piping. If it doesn't work, repair it (if you have time, patience and need it, you can replace the spool, or simply replace the entire solenoid valve.