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[Ring] related maintenance (2015.3.5)
     Prevent premature starter power is turned on. Sided ring gear teeth when worn, the ring gear can be used upside down; when individual tooth is damaged, can continue to use, but not into the ring gear, it can be hand-crank crank crank down, dirty trick with the ring gear starter gear shifted; if both sides of the ring badly worn parts should be renewed or welding repair. If there is severe wear ring gear and the engine is not running smoothly, it is a loss of balance caused by the wear ring should be corrected balance.

Links:
Pinion jyzdl.com
Hardened carburizing grinding gears http://jyzdl.com/products-detail.asp?cpid=426