Inspection
1. Measure the free height of the spring and, if it is smaller than the limit, replace. The standard value is 51.0 mm (2.01 inch) and the wear limit is 50.0 mm (1.97 inch)
2. Measure the squareness of the spring and, if the limit is exceeded, replace. The standard value is 2° or less and the wear limit Max. 4°.