The medium-small type of jaw crusher usually recovered to the original performance by repairing or minor repairs, don't need to make an overhaul. The large type of jaw crusher could be recovered to the operational performance by overhauling if necessary.
The repair contents of jaw crusher are as follows:
(1) Clean and inspect the eccentric shaft and bearings, usually the eccentric shaft and bearings should be cleaned once every 6-8 months and be replaced when the clearance of rolling bearings exceed the limit value.
(2) Replace the jaw plates. The old jaw plates can be repaired with minor repairs methods as the spare parts for next repair. The side liners wear is small, no need to be replaced in every repairing.
(3) Check or replace the toggle plates, toggle seats and tension springs, etc. The springs must be replaced when break. Replacing the adjustable bolts fixed on the adjustable slide rails which should be adjusted frequently. The threaded part wear faster and its service life is short. Other parts should be repaired same as minor repairs.
The repairing interval time of jaw crushers should be decided according to the working conditions, commonly 12 to 16 months.