1, shackles should be smooth and smooth, do not allow cracks and other defects, sharp edges, burning.

2, prohibit the use of cast iron or cast steel yoke. Buckle can be used steel forgings, forging after the processing of the shaft pin.

3, should not be bound by any drilling or welding repair. Button and needle should not be able to repair the permanent deformation.

4, when used, should check the buckle and latch, but excessive wear, deformation and fatigue cracks.

5, the needle must be inserted when the horizontal spacing must be used.

6, the correct installation, the buckle width axis should not reduce the body, the thread connection is very good.

7, the use of not more than the safety load of the yoke