3. Forklift shift solenoid valve is stuck. The clearance between the slide sleeve and the spool of the solenoid valve is very small (less than 0.008mm), and is generally a single piece Assembly, when there are mechanical impurities brought in or too little lubricant, it is easy to jam. The treatment method can be used steel wire from the head of the small hole stabbed into, so that it pop back. The fundamental solution is to remove the solenoid valve, take out the spool and spool sleeve, and clean it with CCI4 to make the spool move flexibly in the sleeve. The disassembly should pay attention to the assembly order of each part and the external wiring position so that the reassembly and wiring is correct, also check whether the oil mist spray hole is blocked and the lubricant is is sufficient.
4. The forklift shift solenoid valve is leaking. External leakage: The cause of external leakage may be loose screws or broken valve parts, the exclusion method is to tighten the screws or replace the leaking components. Internal leakage: solenoid valve can not be closed after cutting off the power supply, the scene observed that the preset quantitative arrival, the oil gun open still have the flow of manifestation, the reason is that the diaphragm is broken or valve parts have foreign matter so that the main valve can not be closed, the exclusion method is that the diaphragm should be replaced or cleaning valve parts. Air leakage can cause air Insufficient pressure, making it difficult to open and close the forced valve, due to damage to the gasket or wear of the slide valve and cause several cavities to escape air. In dealing with the switching system of the solenoid valve failure, should choose the appropriate time, and so the solenoid valve is in the loss of power to deal with, if the processing is not completed within a switching gap, the switching can be Switching system is suspended, from the processing.
5. Forklift shift solenoid valve action is sluggish:The response is sluggish after energized and cannot reach the requirement. The reason is that there is a foreign body at the valve or pilot valve, so that it can not can not move flexibly. The method of elimination is to clean the valve or pilot valve.
6. Forklift shift solenoid valve without small valve role: no small flow embodiment when pre-set refueling. The reason is that the small and large flow coils are connected backwards or the large valve pilot valve is closed is not tight. The way to eliminate is to first confirm the wiring method, ensure the coil is correctly connected, and then clean the valve parts or diaphragm.
7. Forklift shift solenoid valve large valve flow is small or no oil: the cause of this failure is that the diaphragm does not open the whole, large valve pilot valve does not open the whole or no stroke. The solution is to clean or replace the valve pilot valve to ensure full travel, and clean the valve cover channel to ensure the diaphragm opens freely.
8. Slow opening speed of forklift shift solenoid valve. Cause of failure: 1) poor sensor sensitivity, slow response; 2) the solenoid valve spool and valve seat produced Adhesion, resistance is too large; 3) pilot solenoid valve (also called jet solenoid valve) pilot hole blockage; 4) AC voltage is low or battery power is insufficient.