One is the leakage of the oil switch. The reason is that the joint between the valve body and the valve seat is worn, rusted, and there is debris, resulting in poor sealing. The solution is: to clear the debris between the valve body and the valve seat, the valve body steel ball wear should be replaced. Tapered body wear and rust can be ground and cleaned with abrasive paste to improve its tightness. The second is thread leakage. The reason is that the nut is loose and the thread slides. Replace the nut or bolt. If the threaded hole is slipped, the hole should be tapped and replaced by a larger bolt. A few turns of polyethylene plastic tape can also be wound on the bolt. The third is self-tightening oil seal leakage. The reason is that the oil seal lip wear, oil seal skeleton deformation, self-tightening spring degreasing, journal severe wear and so on. The solution is: replace the new oil seal, press it flatly during installation, prevent the self-tightening spring from degreasing, the oil seal lip can not be twisted, and apply a small amount of butter. Severe wear of the journal should be replaced. Fourth, the plane joint leakage. The reason is loose joints, damaged seals or uneven thickness. The solution is: use fine sandpaper, rub stone to grind the joint surface, replace the seal. When installing, make sure that the contact surface is clean. Apply grease on both sides of the paper seal and press evenly.
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