The acquisition of basic vehicle repair skills has become an essential requirement for modern vehicle owners in the face of rising vehicle maintenance costs and queuing anxiety. Today, we dismantle the basic tools of the three seemingly simple but hidden machines with the skills to get you out of the “hole” on which you are often new and to start the first step of diy's car。
I. Use of wrench: more than just "cracking"
While the wrench is the most visible tool in car maintenance, many newcomers tend to make mistakes in the first step, leading to the loss of screw teeth or tools. First of all, we need to be clear about the application of the “set wrench” and the “open wrench”. For most car bolts, preference is given to the drum wrench, as it is able to package the whole of the nuts with equal stress and significantly reduces the risk of slippage。
At the heart of the use technique lies the control of the force. The easiest mistake for a newcomer is the blind pursuit of “the tighter the better”. In fact, every bolt on a car has its standard twist. If you don't have a wrench wrench, you can follow the rule of experience of "tight hands and turn a quarter." when removing rusty bolts, the violent shock should be removed by spraying the looser first, and after a few minutes of static, using a small twirl method, using the principle of metal fatigue。
In addition, the wrench's handshakes are highly nuanced. Instead of finger-tiping the wrench, it should be hand-held against the handle. So in case the bolt suddenly looses or the wrench slips off, your fingers don't hit hard engine parts because of inertia. Remember, the first rule of car repair is to protect your hands。
Ii. Jack and the frame: the bottom logic of building security
Many beginners think it's a taboo in the maintenance world to get a jack up on top of the car to work under the car. The jack is just a lifting tool, not a support tool. Hydraulic jacks have the potential to slow down or suddenly fail due to the ageing of the seal. Therefore, the first technique to be used safely is that the jacks and the security stand must be used in tandem。
Before using a jack, it is important to ensure that the vehicle is parked on a flat and hard ground. If operating on soft tar road or land, a thick plank or steel sheet must be attached to the bottom of the jack to increase the stress area. The search for “pinning points” is key, and each vehicle has a specially reinforced lift (usually in the dent on the inside of the side skirt) which is strictly forbidden to top a jack on the oil shell, arm-stamping or floor, otherwise it is highly vulnerable to deformation of the frame。
When the vehicle rises, the safety frame is placed on the side shelf or at the plant's designated support point, and the weight of the vehicle is slowly down to the jack, so that the weight of the vehicle is evenly placed on the frame. Before officially drilling into the bottom of the vehicle, shake the body hard to confirm that it is as stable as tarzan before operating. While cumbersome, this set of processes is a “lifeguard” for every maintenance worker to be able to work peacefully until retirement。
Multimeter: “flaming eye gold” for viewing circuits
Modern cars are essentially a conglomerate of electronic equipment, and a universal watch is a sharp instrument for the diagnosis of circuit failure. For newcomers, there is no need for sophisticated electronic circuits, but for measuring voltage and breakdown。
The first practical technique is “classure health testing”. In engine outbursts, the pass-through table is assigned to the direct current voltage slot (dcv 20v) and the red and black forms are exposed to positive and negative cells. If the reading is less than 12. 2 v, the power is insufficient, and if the instant voltage is broken by 9 v, the life of the battery is predicted. This will help you prejudge, and avoid being late for fire in cold mornings。
The second technique is "the fuse break test." when an electrical device in the vehicle (e. G. A rainbrush or smoker) fails, it is not necessary to remove a fuse to look at it. The passphrase is dialed to the "beeping slot" and the direct contact with two metal test points on the top of the fuse indicates that the current is running and the silence represents a burnout. This no-lose detection can significantly increase the efficiency of the screening。
In the course of operations, care must be taken to "quantitative selection " . If the voltage is not determined to be high, it is always measured at the highest level in order to protect the life watch from burning. At the same time, when measuring resistance or breakage, it is necessary to ensure that the circuit is in a state of power outage, otherwise incorrect data will be produced and even equipment damaged。
Summary and recommendations for action
Automobile maintenance is not an inescapable science, but its core is awe of tools and a normative operation. By mastering the wrench's sense of power, the safety redundancy of the jacks and the logical diagnosis of the one-size-fits-all scale, you have been able to independently complete basic maintenance projects such as the replacement of engine oil, the replacement of air cores or the sorting of simple circuits。
It is recommended that you newcomers first read the user manual accompanying the vehicle, where the most authoritative lifting position and specification parameters are marked. Starting with a simple check, the confidence of the opponent is gradually built。
What's the biggest problem you've ever had with a car? Or do you still want to know what tools are used? Welcome to the comment section. We'll talk about it together。
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