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Maintenance and maintenance of automobile hoses

Information Sources:Hong Jing Auto Parts | Release Date: 2017-04-18 | Browser:
Key words:
1. coolant hose
 
As a flexible pipe connection, the coolant hose is widely used in automotive pressure accumulators and auxiliary heat exchangers. In order to ensure that the coolant flows smoothly through the manifold and valve body needs, coolant hose with a bizarre tree-like multi-branch sub-channel structure. Coolant hose not only to meet the functional, structural size and performance requirements, but also must ensure that the layout is extremely complex, compact engine fully fit.
 
The engine's high temperature radiation and oil immersion and other working conditions, so that the outside of the coolant hose gradually aging, but the most common form of aging is carried out by the outside. Therefore, when the external appearance of a small pinhole, it shows that the hose has been a serious internal corrosion.
 
Once the coolant has a substantial leak, the fault is natural at a glance. However, the key to the problem is not to dismantle the hose under the premise of how to diagnose its internal corrosion situation. The following method can help you quickly and accurately find the coolant hose that will come to an end:
 
Hand kneading the hose, especially the upper part of the radiator, bypass, manifold, valve body and heater hose, and its connecting end is the most important. If the kneading has a soft or inelastic feel (relative to other parts), it indicates that the hose has undergone severe corrosion. How the car at this time the mileage is low, it is recommended to test the cooling system voltage. When tested, the negative pole of the voltmeter is connected to the ground of the battery; the positive electrode is inserted into the coolant (not accessible to any metal parts). If the voltage reading in 0.3V or more, you need to complete the vehicle ground electrode for a comprehensive system of inspection. Also, make sure that no auxiliary ground is connected to the radiator bracket.
 
For the hose channel, even if only one branch of the leak, it should also replace the entire coolant hose, otherwise it will only make you less effective, because of small loss.
 
While most hoses can be flexibly mounted without kinks, almost all hoses are molded because of the need for molded molded hoses to be more suitable for compact installation space.
 
The coolant hose of the OEM clamp is usually made of elastic snap ring. The elastic snap ring creates a permanent compression deformation inside the hose, thereby achieving a more tight connection with uniform and continuous pressure. However, when the hose connection end of the groove or deformation occurs, OEM elastic clasp seal is not as good as the maintenance of high-quality clamp. The maintenance clamps are mainly plastic retractable snap rings that can continuously adjust the clamping force and the turbine clamps with a permanent tension of the collar or leaf spring. Wherein the turbine chuck is capable of producing a uniform pressure in the circumferential direction of 360 ° and compressing the permanent deformation caused by compression to ensure the reliability of the fastening connection. The superior performance of the hose clamp can not only prevent the leakage of coolant, but also greatly reduce the amount of air inhaled during engine cooling.

2. Vacuum tube
 
Current emission control technology can monitor and compensate for the concentration of the mixture in real time, and even when the vacuum tube leaks, it is possible to maintain the normal operation of the discharge test system. But if the vacuum tube failure, will certainly lead to driving comfort problems
 
The vacuum tube is located between the complex and compact powertrain components, making it very difficult to carry out the inspection is very simple, not to mention the hinterland of the field study. As the vacuum tube approaches (or rests) the exhaust manifold and the top of the cylinder, the working environment is harsh. In addition, the vacuum tube passes from the vicinity of the input signal tube of the exhaust gas recirculation device EGR and passes along the hood below the battery pack, both of which are sharp, thin iron corners, and the possibility of battery acid leakage, Dangerous, easily injured disabled.
 
3. Automatic transmission coolant hose
 
Many automatic transmission cooling lines contain a portion of the rubber hose. Its flow is quite complex, dazzling, difficult to distinguish. Once they leak, it will inevitably lead to failure of the transmission assembly, and during this period, the vehicle early warning system will not make any prompt that the automatic transmission is not installed coolant leakage sensor.

4. Power steering machine hose
 
Power steering machine accumulator leakage, but also a more common system failure phenomenon. The fault has sweat more potential leaks, where the oil return hose is one of the vulnerable components.
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