1. Put a piece of ා 600 sandpaper in ATF oil and soak for about 30 minutes. Carefully tap the valve body to remove the stuck stem from the bore. It may be necessary to lever it out with a small screwdriver.
2.使用螺絲刀時，小心不要刮傷閥孔。檢查單向閥杆上是否有摩擦痕跡。用浸有ATF油的#600砂紙打磨氣門杆上的毛刺，然後用溶劑清洗氣門杆並用壓縮空氣吹幹。
2. When using the screw driver, be careful not to scratch the valve hole. Check for friction marks on the one-way stem. Grind the burrs on the valve stem with ා 600 sandpaper soaked in ATF oil, then clean the valve stem with solvent and dry it with compressed air.
3.卷起浸透ATF油的#600砂紙的一半，並將其插入卡住的氣門杆的氣門孔中。輕輕擰鬆砂紙並將其緊緊地貼在閥孔表麵上，然後邊推邊拉邊擰砂紙研磨閥孔。拔出600砂紙。
3. Roll up half of the ා 600 sandpaper soaked in ATF oil and insert it into the valve hole of the stuck valve stem. Gently loosen the sandpaper and stick it tightly on the surface of the valve hole, and then screw the sandpaper to grind the valve hole while pushing and pulling. Pull out 600 sandpaper.
4.用溶劑清洗整個閥體，然後用壓縮空氣吹幹。在氣門杆表麵塗抹ATF油並將其滴入氣門孔。閥杆應能以自身重量落入閥孔底部。否則，重複步驟4並重新測試。如果閥杆仍然卡住，則更換閥體。
4. Clean the whole valve body with solvent and then dry it with compressed air. Coat the surface of the valve stem with ATF oil and drip it into the valve bore. The valve stem shall be able to fall into the bottom of the valve bore with its own weight. Otherwise, repeat step 4 and retest. If the stem is still stuck, replace the valve body.
5.取出小型混凝土攪拌機的閥杆，用溶劑清洗閥杆和閥體。用壓縮空氣吹幹所有零件，然後用ATF油作為潤滑劑重新裝配。
5. Take out the valve rod of small concrete mixer and clean the valve stem and valve body with solvent. Dry all parts with compressed air and reassemble with ATF oil as lubricant.
6.建議對混凝土儲罐及進出口周圍進行清洗，確保混凝土不結塊。
6. It is suggested to clean the concrete storage tank and the surrounding of the inlet and outlet to ensure that the concrete does not agglomerate.
