In order to protect the wheel box of the twin screw extruder, you must obey the followings:

1. The lubrication used in the twin screw extruder must be original No.150 Medium Pressure gear oil;
2. The normal operation oil leveler may not under the center oil leveler. Please supplement when it’s under the center oil leveler;
3. After the first 500 hours’ using, please change the lubrication;
4. Then, change the lubrication after every 3000 hours using;
5. Please clean the box and oil filter when changing the oil. First settle the new oil, put the upper layer of oil into the box to clean it and spill the oil. Then pour the new oil in;
6. Please lean the oil filter of the twin screw extruder per month during normal using period, and per week during running-in period. The way of cleaning: first find the oil filter and open it, then take out the dunghill in it.