How to maintain auto parts? Comprehensive maintenance methods for auto parts
1. Fear of “dirty”
If parts such as fuel filters, oil filters, air filters, hydraulic oil filters and various filters are too dirty, the filtration effect will deteriorate and too many impurities will enter the oil circuit cylinder. Inside, it will aggravate the wear and tear of machine parts and increase the possibility of malfunction; if it is seriously blocked, it will also cause the vehicle to not work properly. If the water tank radiator, air-cooled engine block and cylinder head radiator, cooler radiator and other parts are too dirty, it will lead to poor heat dissipation and excessive temperature. Therefore, such “dirty” parts must be cleaned and maintained in time.
2. Fear of “heat”
The engine piston temperature is too high, which can easily lead to overheating and melting and cylinder locking; rubber seals, triangular tapes, If tires are overheated, they are prone to premature aging, performance degradation, and shortened service life; if the coils of electrical equipment such as starters, generators, and regulators are overheated, they are easily burned out and scrapped; vehicle bearings should be maintained at an appropriate temperature. If overheated, the lubrication will be reduced. The oil quickly deteriorates, eventually leading to burned bearings and vehicle damage.
3. Fear of “crossing”
Various parts in the diesel engine fuel system, the main and driven gears in the drive axle main reducer, hydraulic The control valve block and valve stem, the valve core and valve sleeve in the fully hydraulic steering gear, etc., these matching parts are specially processed during manufacturing and ground in pairs. The fit is very precise and will always be in pairs during the service life. Use and must not be interchanged. Some mating parts, such as piston and cylinder liner, bearing bush and journal, valve and valve seat, connecting rod head cover and rod body, etc., after a period of running-in, the fit is relatively good. During maintenance, attention should also be paid to Assemble in pairs and do not visit each other.
4. Fear of “reverse”
The engine cylinder gasket cannot be installed backwards during installation, otherwise it will cause premature ablation and damage of the cylinder gasket; for some Specially shaped piston rings cannot be installed backwards and should be assembled according to the requirements of different models; there are also direction requirements when installing engine fan blades. Fans are generally divided into two types: exhaust and suction. They cannot be installed backwards, otherwise it will cause poor engine heat dissipation. , The temperature is too high; for tires with directional patterns, such as herringbone pattern tires, the ground imprint after installation should make the herringbone tip point to the rear to ensure maximum driving force. Different models have different requirements for the two tires installed side by side, and they cannot be installed at will.
5. Fear of “lack”
When repairing vehicles, some small parts may be missed due to negligence, and some people even think that they are not installed properly. Pretending to be indifferent is very dangerous and harmful. Engine valve locking plates should be installed in pairs. If they are missing or missing, it will cause the valve to lose control and damage the piston and other parts; startOnce the anti-loosening devices such as cotter pins, locking screws, safety sheets or spring washers installed on the connecting rod bolts, flywheel bolts and drive shaft bolts are missing, they may cause serious malfunctions during use; engine timing Once the oil nozzle used to lubricate the gears in the gear chamber is missing, it will cause serious oil leakage there and make the engine oil pressure too low; the loss of the water tank cover, oil port cover, and fuel tank cover will cause the intrusion of sand, gravel, dust, etc., aggravating the situation. All parts are worn.
6. Afraid of “oil”
The paper filter element of the engine dry air filter is highly hygroscopic. If it is stained with oil, it will easily The mixture with a higher concentration is sucked into the cylinder, resulting in insufficient air volume, increased fuel consumption, reduced engine power, and the diesel engine may also cause “speeding”; if the triangular tape is stained with oil, it will accelerate its corrosion and aging, and it is prone to slipping. , leading to a reduction in transmission efficiency; if the brake shoes, dry clutch friction plates, brake belts, etc. are stained with oil, they are prone to slipping and malfunctioning, thus threatening driving safety; starter motors and generator carbon brushes, etc. , oil stains will cause insufficient starter motor power and low generator voltage due to poor contact. Tire rubber is very sensitive to corrosion by oil. Contact with oil will cause the rubber to soften or peel. Short-term contact can cause abnormal damage or even serious damage to the tire.
7. Afraid of “washing”
Some first-time drivers or repairmen may think that all spare parts need to be cleaned. In fact, this understanding It’s one-sided. For the engine’s paper air filter, when removing dust on it, you cannot use any oil to clean it. You only need to gently tap it with your hands or blow high-pressure air from the inside of the filter element to the outside; it is also not suitable for leather parts. To clean with oil, just wipe it clean with a clean rag.
8. Fear of “pressure”
If the tire casing is stored under pressure for a long time and is not turned over in time, it will be deformed due to extrusion, affecting its use. Life span; if the paper filter elements of air filters and fuel filters are squeezed, they will be greatly deformed and cannot reliably perform filtering; rubber oil seals, triangular tapes, oil pipes, etc. cannot be squeezed either. Otherwise, it will also deform and affect normal use.
9. Afraid of being “close to fire”
Rubber products such as tires, triangular tapes, cylinder liner water rings, rubber oil seals, etc., if they are close to a fire source, It will easily age, deteriorate or be damaged. On the other hand, it may also cause fire accidents. Especially for some diesel vehicles, it is difficult to start in the severe cold in winter. Some drivers often use blowtorches to heat them. Be sure to prevent burning of the lines, oil lines, etc.
10. Fear of “repetition”
Some parts should be used once, but some drivers or repairmen do so in order to save or because they do not understand the “taboos” Repeated use can easily lead to accidents. Generally speaking, startConnecting rod bolts, nuts, imported diesel engine injector fixing bolts, cylinder liner water blocking rings, sealing copper pads, various oil seals and sealing rings of the hydraulic system, and pins, cotter pins and other parts in important parts must be replaced after disassembly. New product; for the engine cylinder gasket, although no damage is found during maintenance, it is best to replace it with a new one, because the old product has poor elasticity, poor sealing, and is prone to ablation damage. It needs to be replaced after a short period of use, which is time-consuming and labor-intensive. Therefore, if there is a new product, It is better to replace it if possible.
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