Used crusher parts should not be bought, buy need to be careful

Many different kinds of crusher, the secondary crusher also include jaw crusher, counterattack crusher, hammer crusher, cone crusher, for these crusher, what are the basic fittings, fittings is not complete, factory don't produce, we suggest that carefully when the choose and buy. 
Type of crusher (jaw crusher, counterattack crusher, hammer crusher, etc.) there are many kinds of, the common several kinds of crusher spare parts, for reference only. 
Jaw crusher accessories: jaw plate, side plate, bracket, etc.; 
Counterattack crusher accessories: hammer, back boards, etc.; 
Hammer crusher accessories: hammer, liner board, sieve plate, etc. 
Cone crusher accessories: broken wall, rolling mortar wall, etc. 
The choose and buy of the secondary crusher to maximize the value of the accessory factor is also part of the main.