一辆解放牌8t吊车(由一汽CA1040汽车改装而成),在吊装货物时油门太大,发动机转速超常。根据故障现象,对吊车的整个油门机构进行了检查,发现此故障是因转台油门主缸(采用BJ130车上的离合器主缸)的皮碗涨死所致。换上了新的皮碗后试车,故障消失。一周后,这辆吊车又出现了与上次相同的故障。于是又重新检查了一遍,发现问题还是出在油门主缸 A liberation of 8t crane (modified by FAW CA1040 car), the throttle is too large when lifting the cargo, the engine speed abnormalities. According to the phenomenon of failure, the entire throttle body of the crane was inspected and found that the failure was due to the turntable throttle master cylinder (using the clutch master cylinder BJ130) rose up the bowl. Put on a new cup after the test, the fault disappears. A week later, the crane again appeared the same fault as last time. Then again check again and found that the problem is still out of the main throttle