How should trucks be maintained? Avoid truck maintenance traps

Car maintenance has always been a topic that card friends are very concerned about and have been hot, and the old drivers must have their own method theory, but the following points you do right? Core: to maintain repair, develop good driving habits, not overload.

drive

One, low block and high turn

Keep the speed in a reasonable range, it must be able to save fuel, but if the speed is too low, the impact on the engine gearbox and even the entire transmission system is very large.

Driving too low speed for a long time, the engine can not reach the reasonable speed range, the engine thermal efficiency is not good, the combustion is not complete resulting in carbon deposition, and the impact of carbon deposition is very troublesome, carbon deposition will lead to the air-fuel ratio of the car engine is not allowed, but also lead to the compression ratio of the car engine is not allowed, which will affect the engine's power output and fuel consumption.

It can also cause damage to the engine. In particular, the formation of carbon deposits in the engine combustion chamber will cause the engine compression ratio to increase and lead to knocking, which is extremely serious to the connecting rod of the engine.

Gearbox, too high gear too low speed, will lead to drag, seriously affecting the trailer axle gearbox, especially in the case of full load.

The transmission system is too high gear too low speed, the rear teeth pack, the drive shaft, the half bearing is also subjected to very large pressure.

Two, too long preheating

Cold car start preheating, is a very good habit, the movement of the engine is not necessarily very good, but too long hot car is not necessary.

Cold car start, when the start of the moment, the engine speed may be about 800-1000 RPM (depending on the car), and after the start, waiting for the speed to fall back, generally can run normally, of course, before the water temperature and oil temperature did not come up, it is not recommended to pull up, after all, high turn lava, chicken fly!

Three, no auxiliary braking

The mainstream heavy trucks now have auxiliary braking, which is widely used in engine braking, but some people still have some misunderstanding about engine braking: When the engine braking speed is so high, will it damage the engine?

First of all, the engine brake in the working state, fuel consumption is very small. Because the control strategy of the electronically controlled engine is that when the engine braking works, the engine injector will stop injecting fuel, so the problem of fuel consumption need not be worried, on the contrary, it will save fuel.

According to the characteristics of engine braking, in a certain speed range, the higher the engine speed, the better the engine braking effect. And as long as the specified speed range is not exceeded, the engine brake is not harmful to the engine, and will not affect the normal use of the engine.

For example, the United truck and the Auman GTL engine equipped with the Westcon engine cannot exceed 2100 RPM when braking.

In addition, engine brakes usually do not require special maintenance. Take the Jiekbo engine brake as an example, it is designed when the service life of the engine is the same, to ensure that it is safe and reliable during use.

Therefore, it is safe to use auxiliary braking boldly, which is not only safe but also extends the service life of the braking system.

maintain

Maintenance is a top priority! Fine original scientific maintenance, really can be done to replace repair.

First, maintenance site selection

Should trust the designated 4S shop, maintenance point, service station. First of all, a large brand of service station, basically only maintain a brand of vehicles, for technicians also have professional training, professional training after the technician, the benefits are: small to the oil filter needs to play how much torque he has a reference, professional!

In terms of simple oil change, many small shops change the oil directly on the roadside, the roadside sand is large, there are impurities blowing into the oil is very likely. The maintenance parts used are also specified by the manufacturer, which is very guaranteed. At the very least, really in these places have been pit, rights protection is more convenient than the roadside shop.

Once a case in the roadside shop maintenance, change to the fake oil tragedy, model: Tianlong flagship 560, Chenggong maintenance in Kunming, a Chenggong logistics transportation is completed, the map is cheap, convenient in a small repair shop to do maintenance.

After 2000 kilometers, all the parts inside the engine that can move are damaged,trailer axle find the business compensation was rejected, and then invited the city bar code (Kunming News Station) reported mediation before it was solved, the oil is not guaranteed, and the rights protection is difficult, which is why it is not recommended to do maintenance in a small factory.

Second, carefully read the vehicle maintenance manual

Vehicle maintenance manual is really a very important book, read this book, for the maintenance of the car is crucial.

1. Maintenance cycle

The maintenance cycle of the vehicle is a very heavy reference for vehicle maintenance, and varies from car to car, some have long oil change technology, some are useless, and the whole crucial cycle is clearly written in the maintenance manual, just need to read.

2. About the oil

Oil is a particularly important value - the oil label. The larger the oil label, the higher the viscosity of the oil, the engine is set the label that should be added, too high - the engine does not move, affecting the power and increasing fuel consumption. What suits you is the best.

The amount of oil filling, the amount of oil filling, is also indicated in the maintenance manual. Too much oil, the crankshaft handle of the engine, the big end of the connecting rod will produce severe agitation, resulting in the loss of engine power, the serious thing is that if there is a large amount of oil splashed on the cylinder wall, or even lead to burning oil, when the oil is filled, it can not hate less.

3, how tight the bolt should be

Some people are aware that the tighter the safer, in fact, the tighter the screw will only increase the security risks, because the screw is too tight, it will make the screw deformation, thereby increasing the risk of sliding wire, and even lead to fracture.

To change a tire for example, directly use the wind cannon to tighten, and first use the wind cannon to hit a part, and finally use the torque tool to hit the fixed torque, obviously the latter operation is more standardized and safer!

Tire pressure, the installation of wearing parts and other parameters have, you choose the place specified by the manufacturer to do maintenance, these things do not need you to worry about, technicians have been trained, know!

Of course, this is not to say that the maintenance is not good in addition to the place specified by the manufacturer! They also have the corresponding expertise, but they have to face a variety of situations, a wide range of models, and the master's technology is uneven, relatively more risky.

4, gear oil and antifreeze

Take Dongfeng for example, Dongfeng gear oil is generally two types, grade GL-5 85W-90 and GL-5 85W-140. Generally applicable temperature is between -15℃ and 49℃, the viscosity of 140 is larger than that of 90, 90 is used on the gearbox, and 140 is used on the rear axle.

From GL-1 to GL-6, it represents the quality of the oil, the larger the number, the higher the quality, the various gears operating under high-speed impact load, high-speed low torque, low speed conditions, the provision of GL-5 gear oil, heavy commercial vehicles are also selected this level of gear oil. Follow the instructions.

Antifreeze, the full name should be called automotive antifreeze coolant. Don't put any more water in it!

So much for the maintenance, there is no need to repeat.

Use the car

One, don't overload, don't overload, don't overload

Overload on the vehicle's power chain, frame, brake system in all aspects are damaging, according to the calibrated tonnage transport, not only good for the car, but also to avoid unnecessary trouble and expenditure, are 2020, if you say not overload does not make money, advise you to exit this industry as early as possible.

Two, do a good check

Engine oil and water, tire pressure, air filter, oil filter and other components working conditions, especially diesel filters, for the oil products of China, this is a very important part.

Three, don't be cheap

1, add a small oil, the quality of the oil is not guaranteed, the source is also questionable, it is likely to be stolen by the oil rat, if you use it, it is also to a certain extent to promote the oil rat's unhealthy wind.

2, urea, urea must not be underestimated, urea quality is not good, crystallization, blockage and other problems occur frequently, if this cause causes the engine torque limit, it is not small impact on timeliness, the most critical if it causes damage to the post-processing trailer axle system, then wait for the money.

3. Wearing parts and maintenance parts

Especially tires, with refurbished tires, cottage tires, not only can not save money, but also may cause a threat to your life, more than worth the loss ah. Maintenance parts have been outlined above, no more details.

Fourth, do not blindly modify and install

For a car, the original is not necessarily the best, but it must be the most suitable, for modification and installation must be rational.

1, the modification of headlights, blind modification of high power or xenon is likely to cause the computer board to burn out, I have seen several cases. And the non-standard modified circuit, there is a risk of spontaneous combustion.

2, the installation of parking air conditioning, parking warm air, fuel tank heating, etc., must go to the regular modification factory.

3, increase the brake pump, brake king, etc., if not overloaded these are useless necessary operations.

Conditions on the original factory optional, safe and efficient.

repair

Now the car, the level of manufacturing technology is not low, and not as easy to break as before, the old master has a word: "The car is not broken, it is repaired."

After the vehicle is abnormal, it must be checked in time, the level of the repair shop is crucial, in addition to the above mentioned places specified by the manufacturer, a good repair shop is also a good choice.

First, how to judge the degree of professionalism of the repair plant?

1. Detection equipment used

It's 2020, and the repair of the car has already passed the era of relying on Wang, Wen and ask, and there are computer boards, and a good detection equipment is expensive, but convenient and efficient.

2, whether the operation is standard

Including the above mentioned problems about bolts, as well as maintenance operation specifications are very particular

Second, the source of replacement parts

There are original parts, auxiliary parts, dismantling parts, for the key parts or recommend the use of original parts, can not be penny-wise and pound-foolish. Of course, it is not impossible to use the demolition parts with clear sources. Appearance parts or other irrelevant parts, can save the point is the point, after all, the original parts are not cheap.

Third, regular inspection and replacement of wearing parts

Especially on the gas path and fuel, not timely replacement may cause more serious consequences. The inspection of the drying tank should pay special attention to timely drainage and check the working condition. Cut it off at the source.

Or that sentence, to develop good driving habits, to maintain repair, not overload, although in the recession period, still can profit!