A.26.5MPaB.34.3MPaC.35.5MPaD.51.9MPa
A.0.6MPa~0.8MPaB.0.6MPa~0.9MPaC.0.7MPa~0.9MPaD.0.8MPa~1MPa
A.彈簧折斷B.制動銷變形C.滑塊或撥塊變形D.缺油或者是油臟