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| Faults | Reasons | Solutions |
| Mandrel stops running | â‘ Feed lots of materials before grinding the pressing chamber hot. â‘¡ The cakes are too dry when grinds. â‘¢ The cake is too thin and the pressing chamber pressure increases. â‘£ Solid materials jam the pressing chamber. |
â‘ Feed materials after the oil cake coming out. â‘¡ Increase the cake moisture. â‘¢ Adjust the bolt to increase the cake thickness. â‘£ Switch off the electricity and clean the pressing chamber. |
| The materials can’t be charged in or the oil can’t outflow | ①The pressing screw is not smooth. ② The pressing chamber has oil in it, the oil material and oil mixes. ③ The oil grooves of pressing strip and pressing ring are jammed. ④ The oil material moisture is too low when choosing hot squeezing. |
â‘ Grind the pressing screw with oil cakes. â‘¡ Squeeze oil materials by adding some cakes. Refeed materials gradually. â‘¢ Take down the pressing strips and rings, soak them for ten minutes with hot water, then clean them. â‘£ Ensure suitable oil material moisture. |
| Abnormal cake outlet | â‘ Squeezing-in moisture is too low. â‘¡ Squeezing-in moisture is too high. |
â‘ Add water. â‘¡ Dry the materials. |
| Locknut exudes oil | ①The pressing screw end faces have residues, and there forms a gap. ② The locknut doesn’t compress the pressing screw tightly. |
â‘ Stop the oil press machine and clean the pressing screw end faces. â‘¡ Tighten the locknut. |
| Locknut exudes oil | ①The pressing screw end faces have residues, and there forms a gap. ② The locknut doesn’t compress the pressing screw tightly. |
â‘ Install the pressing rings correctly. â‘¡ Thicken the cake thickness. â‘¢ Change the machine parts, choose pressing strips and rings that fit for pressing high oil content oil materials. â‘£ Clean the oil groove. |
|  Low oil yield | ①The pressing screw and pressing rings are not smooth. ② Oil materials contain too much moisture. ③ The cake is too thin. ④ The pressing screw is worn down. ⑤ Squeeze too many times. |
①Grind the pressing screw and pressing rings smooth with oil cakes. ② Decrease the oil material moisture. ③ Increase the thickness of cakes. ④ Replace new pressing screw. ⑤ Adopt hot squeezing. |
|  Residue overflows seriously | ①Oil grooves of pressing strip and pressing ring are too deep. ② The cake is too thin and the pressing chamber pressure is too big. ③ The pressing rings were not compressed tightly. ④ Squeeze too many times. ⑤ The machine parts wore down. ⑥ Oil materials are too dry. |
①Adjust the position of pressing strip and ring. ② Increase the thickness of cakes. ③ Compress the pressing rings tightly. ④ Decrease the squeezing times. ⑤ Change the parts. ⑥ Improve the oil material moisture. |
|  Pressing cage fractures | ①Feed too many raw materials suddenly when the machine starts running. ② Metal object enters the pressing chamber. ③ The oil cake is too dry when the machine does grinding-in. ④ Feed forcibly when the gap between the adjustable cake head and the cake-out ring is too small. ⑤ Squeeze too many times and don’t add water to the materials. ⑥ Feed abundant materials without clean the residual cakes. |
①You should feed slowly first, then add more materials after the oil cake coming out. ② Choose and clean the raw oi material carefully. ③ Add proper water to the oil cakes. ④ Increase the gap. ⑤ Add some water to the materials to low the pressing chamber pressure. ⑥ Start the machine after cleaning the residual cakes. |
| Â Pressing cage fractures | â‘ Reverse the mandrel forcibly when the mandrel locks. â‘¡ Reverse the big v-belt pulley forcibly when the mandrel locks. |
â‘ It is strictly prohibited to reverse the mandrel. â‘¡ It is prohibited to reverse the big v-belt pulley. |
| Â Mandrel breaks off | â‘ The bearing elastic ring is reversed. â‘¡ Overwind the nut and lead to crushing of the bearing. |
①Install the elastic ring correctly. ② There should be a certain gap between end faces of nut and bearing. |
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