When the jaw crusher works, the following aspects should be checked:

1. The temperature of bearings cannot exceed 50-60℃;

2. Check whether the oil amount is sufficient or not in each lubrication point;

3. Check whether the oil pump and the oil ring work properly, check the oil pipe is blocked or not;

4. Check the operation condition (vibration and sound);

5. Check the bolts are loose or not;

6. Check whether the hopper is blocked or not, and the feeding amount is uniform or not;

7. Check the motor load, temperature rise and sound;

8. The friction between thrust plate and supporting pad is normal or not, whether it is deflect or shift.