Yueqing Hualong Mechanical Accessories Factory

Exhibition Show Current Location: Home » NEWS > Exhibition Show >

What's wrong with the poor service life of the gasoline pump?

Life of gasoline pump. (a) In theory, this thing should have the same life as the car, so there is no certain limit of kilometers and time. Some performances after the gasoline pump is damaged are as follows: 1. When the pump core is damaged, when the fuel supply system works, when the key door is opened at this time, there is no sound of the gasoline pump running; 2. When the pump body is damaged, the fuel pressure cannot reach the specified fuel pressure value due to pressure relief, so that the engine cannot start. (II) Trouble of gasoline pump: The check valve of gasoline pump is damaged: no residual pressure, which makes it difficult to start; the impeller of centrifugal pump is worn: the oil supply pressure is reduced, and the acceleration is weak; the carbon brush is worn: the gasoline pump stops running and cannot be started; in this case, the bottom of the oil tank can be knocked, the oil pump can still run, the rotor is stuck, and other mechanical faults: the working current of the oil pump is increased, which causes damage to the relay or insurance. Suggestions for truck oil pump maintenance. 1. Most existing electric fuel pumps are installed in the fuel tank. Some vehicles can access the panel and delete the replacement pump without disassembling the fuel tank. 2. The fuel pump in the tank is submerged in fuel to help them keep cool. The gas will damage the fuel pump. 3. The fuel filter should be replaced when replacing the fuel pump. 4. The fuel filter is blocked or the problem of driving the fuel pump by the electrical system may cause symptoms similar to a failed fuel pump. Confirm that the pump is a problem before replacement. If it is definitely determined that the electric gasoline pump is faulty, the first thing is to replace it. If there are no spare parts and the owner has some repair knowledge, he can give first aid according to the following methods. If the owner has no knowledge of car maintenance, he can only wait for the rescue to tow the car to the repair station. When the electric gasoline pump breaks down during driving, and suddenly does not supply oil or the oil supply is insufficient, the cause of the failure should be judged first, and then eliminated according to the situation, and the following steps can be taken:. (1) First, remove the live wire of the external circuit, and test whether there is a fire with the ground wire. If there is a fire, the power supply is normal for the cab oil pump. If there is no fire, check the circuit faults on the vehicle and eliminate them. (2) Connect an ammeter in series in the circuit. If the hands point to about 1.2A and shake back and forth obviously, the control part of the transistor is in good condition and oscillates normally. The fault comes from the mechanical part. If the hands have no indication or the indication exceeds 2A, or the hands point to 1.2A but do not swing, the fault lies in the control part of the transistor. (3) Turn off the power supply and observe whether the plunger returns. If not, the plunger is stuck or the spring is broken. Open the glass for maintenance. If the plunger is stuck by sundries, remove the oil pump for cleaning. If the spring is broken, just change another spring. Turn off the power supply and the plunger returns. If the plunger is stuck again after turning on the power supply, it means that the tertiary tube is broken and should be replaced. (4) When the power is turned on and there is vibration but no oil comes, the oil inlet valve or oil outlet valve is damaged or stuck, which should be taken out for maintenance. (5) If there is fire when the live wire is removed and there is no fire when the live wire is touched to the bottom cover, the ground between the electric gasoline pump and the car body is false, so that the ground can be normal. Our company specializes in producing various truck accessories, mainly including cab lifting oil pump, cab lifting oil cylinder, forklift tilting oil cylinder and steering oil cylinder. At present, our company mainly focuses on European truck accessories, such as VLVO Volvo truck, BENZ Mercedes-Benz truck, SCANIA Caina truck, Manman truck, RENAULT truck, IVECO Iveco truck, DAF Duff truck and other http://www.hualongjx.cn/.

PREV: How to test the automobile fuel pump in the maintenance of oil pump.
NEXT: The reason why the gasoline pump is always broken is that the shell is overhauled.