If your tractor clutch is not disengaging effectively, follow these steps to diagnose the problem:

• Adjust clutch link rod by instruction to make free distance clearance meet the request.
• Detach clutch house side plate, and adjust 3 release levers'clearance 2-2.5mm. Make uneven degrees of 3 levers are not less than 0.2mm.

• Take apart the clutch, replace the clutch plate.
  

If the generator of your tractor clutch is not generating electricity, follow these steps to diagnose the problem:

1. Turn on the key and observe whether the ammeter or charging indicator light indicates discharge or illuminates. If not, check the circuit and the ammeter or indicator light to correct the problem.
2. If normal, with the engine stopped, disconnect and reconnect the wires from the "+" and "F" terminals on the regulator. Start the engine and maintain idle speed (below medium speed). If the charging or indicator light is off, the regulator is faulty and should be replaced.
3. If the generator is not charging, stop the engine and remove the wire connected to the "+" terminal. Use a small bulb from the vehicle as a test light, connecting one end to the generator's "+" terminal and the other to the outer casing (with the wire from the generator's "F" terminal still connected to the regulator's "F" terminal). Start the engine again until it idles. If the test light illuminates, the generator is functioning properly and there is a break in the charging circuit. Locate and correct the problem. If the test light does not illuminate, there is an internal fault in the generator and it should be disassembled and inspected.
   

If lifter of your tractor fails to lift, follow these steps to diagnose the issue:

1. Use the fault diagnosis method for lifting light loads but not heavy loads to determine if there is a lack of oil, poor oil quality, or oil leakage.
2. Check for malfunctioning safety valves, including dirt stuck in the valve, low pressure, or valve opening. In this case, remove and clean the valve. If the pressure is low, add a flat washer to the valve plug to increase the pressure.
3. The 5 mm diameter steel ball of the descent valve assembly is blocked by dirt, or the descent valve body is stuck, or the push pin is stuck and not returning to its original position. Remove the descent valve assembly, clean all parts, and check if the descent valve body or push pin is stuck.
4. The cylinder safety valve fails to return to its original position after opening. Remove the cylinder safety valve assembly, check for dirt blocking the valve body, clean it, and reassemble it.
5. The oil return valve is stuck, preventing it from operating. Remove the oil return valve assembly, clean it, and reassemble it. The handwheel has been fully screwed into the cylinder head, cutting off the hydraulic oil from entering the cylinder. At this time, the handwheel should be turned out, but not too long, until the farm implement reaches the appropriate lowering speed.