The way to judge the clutch pump is broken: 1, see whether the appearance of the total pump and the sub-pump has oil stains, oil stains indicate leakage; 2, by stepping on the clutch pedal to observe the length of the ejector rod of the pump, too little indicates that there is pressure relief, or the pump rod when the ejector rod is back indicates that there is pressure relief. The clutch master pump refers to the part connected to the clutch foot pedal and connected to the clutch booster through the tubing, its role is to collect the pedal travel information through the role of the booster to achieve clutch separation, when the driver steps down the clutch pedal, the push rod to push the total pump piston, so that the oil pressure increases, through the hose into the sub-pump, forcing the sub-pump pull rod to push the separation, the separation bearing forward; When the driver releases the clutch pedal, the hydraulic pressure is lifted, the separation fork gradually returns to the original position under the action of the return spring, and the clutch is in the engaged state.