1, leakage
Leakage refers to the leakage of fuel, lubricating oil (or gear oil), brake fluid (or compressed air), and power steering fluid of an automobile engine. This is also an obvious symptom of failure and can be found by careful observation. For example, when the compressed air leaks, the sound of air leakage can be clearly heard.
2, excessive consumption of fuel and lubrication
Excessive consumption of fuel and lubricants indicates that the state of the automotive technology has deteriorated and has caused failure.
3, there are special odors
When the car is in operation, if there are brake delays, clutch slips and other faults, it will emit the burnt smell of the friction plates; when the engine overheats and the lubricating oil is burned, it will emit a special odor; the circuit will be short-circuited and grounded. When the wire burns, it will also have a burnt smell.
4, the appearance of the car is abnormal
The car is parked on a flat ground and checked for appearance conditions. If there is a phenomenon such as horizontal or vertical skew, it is an abnormal appearance. The reason is that the frame, body, suspension, tires, etc., have malfunctions, which may cause troubles such as unstable direction, deviation, shift of center of gravity, and “gesture†of the wheels.
5. Mutation of work situation
The so-called sudden change in job status means that the car's working condition has suddenly become abnormal. This is a relatively common fault symptom. For example, if the engine suddenly turns off and then it is difficult to start, it may not even start; the power of the engine suddenly decreases during driving, and the driving force is weak; sudden braking or running deviation during running, or even failure. The symptoms of this malfunction are obvious and it is easy to notice.
6, abnormal noise
The unusual sound that occurs during the driving of a car is an "alarm" for car breakdown. Sudden noise is given during driving. As the driver should be aware of the problem with the car, he should immediately stop and check and must not allow the vehicle to "sick up."
7, exhaust smoke is not normal
In the process of engine operation, the main components of normal combustion products should be carbon dioxide and a small amount of water vapor. If the engine is not properly burned, the exhaust gas will be incompletely burned with carbon particles, hydrocarbons, carbon monoxide and a lot of water vapor. In addition, there are nitrogen oxide compounds, etc. At this time, the color of the exhaust gas may become black, blue, or white, that is, the exhaust smoke is abnormal. For gasoline engines, there should be no obvious smoke in the normal exhaust gas. However, when the lubricating oil is hung on the cylinder, the exhaust gas is blue; when the combustion is not complete, the exhaust gas is black, and when the oil is mixed with water, the exhaust gas is white.
8, overheating
It usually appears on engines, transmissions, drive axle final drives, differentials and brakes. For example, if the engine is overheated, there is usually a problem with the cooling system. It is the lack of coolant or the pump is not working; the transmission and the transaxle are overheated, mostly due to lack of lubricating oil; the brakes are overheated and are mostly caused by the brake shoes not returning. The above phenomenon can sometimes be directly reflected by the warning light on the dashboard. It requires the driver to pay attention when he is driving, or he can test the appearance temperature by hand.
When using a sewer truck, if these conditions occur, we need to properly repair the sewer truck in order to achieve the best performance.
Suction truck maintenance
When raising a sewer truck, you need to pay attention to the following 15 points:
1, check the vacuum pump pipe and separation at the loose phenomenon. Turn the vacuum pump by hand to see if the vacuum pump is sensitive.
2. Into the bearing body to participate in bearing smooth oil, look at the oil level should be at the centerline of the oil standard, smooth oil should be promptly changed or added.
3. Unscrew the water diversion plug of the pump body of the vacuum pump and infuse diversion (or lead).
4. Close the gate valve, outlet pressure gauge and imported vacuum gauge of the outlet pipe.
5. Move the motor to see if the motor steering is correct.
6, start the motor, when the normal operation of the vacuum pump, open the outlet pressure gauge and import vacuum pump, depending on the emergence of the appropriate pressure, gradually open the gate valve, while checking the motor load conditions.
7. Try to control the flow rate and lift of the vacuum pump within the range indicated on the signboard to ensure that the vacuum pump operates at the highest efficiency point to achieve maximum energy savings.
8. The vacuum pump of Hubei Xigong Chusheng Sewage Suction Vehicle and suction truck is in operation, the bearing temperature cannot exceed the ambient temperature 35C, and the maximum temperature cannot exceed 80C.
9. If you find that the vacuum pump has abnormal sound, you should immediately stop to check the reason.
10, vacuum pump suction suction truck, suction truck to stop the use of the first closed gate valve, pressure gauge, and then stop the motor.
11. In the first month of the work, the vacuum pump of the sewage suction truck and suction truck shall change the smooth oil after 100 hours. After each 500 hours, change the oil once.
12. Regularly adjust the packing glands to ensure that the dripping conditions in the packing room are normal (in order to make a drip out).
13. Regularly inspect the wear condition of the bushings, and replace them promptly after the wear.
14. When the vacuum pump is used during the winter season, after parking, it is necessary to screw the plug of the lower part of the pump body to unscrew the medium. Avoid freezing cracks.
15. When the vacuum pump is deactivated for a long period of time, it is necessary to disassemble the pump completely, wipe off the moisture, and apply the grease to the rotating part and the separated part, and keep it properly.
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