1. The body appears strange, the bearing is rotten, worn, and lack of oil. Maintenance method: Disassemble the large pulley, the front discharge port, and hammer the spindle forward or backward. According to the original, the rear axle bearing is first inserted, the rear cover screw is fixed, and the front bearing is added. The oil seal should be replaced, and the base lubricant should be added. Do not add oil.
2. The screw (propeller) can generally produce about 100,000 jins, it will wear out, the output will drop, and it will not puff. Treatment: Replace the new screw (propeller) sleeve with a durable thruster. In general, the new propellers are equipped with old ones and the new ones are equipped with old shafts (pushers).
3. When the discharge hole is too large, the other holes should be exchanged.
4. For other reasons, the discharge nut can not be opened, and the sleeve can be disassembled with a tool hook, clamped with a vise, and disassembled with oxygen.