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What is the reason why the rear brake of a scooter cannot hold?

1 Answers
FelicityDella
07/30/25 8:08am
If it is a drum brake, it may be due to excessive wear of the brake drum or insufficient contact area between the new brake shoe and the brake drum. In this case, the brake shoe needs to be scraped and filed to remove the excess protruding parts in the middle, similar to the process of fitting new shoes to drums in large vehicles, to maximize the contact area between the brake shoe and the drum. Below is some relevant information: 1. Brakes: Brakes are mechanical devices used to slow down or stop a vehicle, also known as decelerators. Scooters generally use drum brakes, which are crucial and must be kept in good condition. 2. Types of brakes: Manual car brakes are located next to the gear shift and are connected to the brake lever. Common types also include bicycle brakes, which rely on rod-shaped brakes fixed to the frame or disc brakes to slow down the vehicle.
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What type of engine oil is used in the Haval M6?

Haval M6 uses the original factory engine oil with the specification 5W40. For later maintenance, you can use Mobil brand engine oil, choosing the No. 1 full synthetic oil; or opt for the Great Wall brand's dedicated full synthetic oil. The viscosity of engine oil changes with temperature, so special attention must be paid to its performance under both low and high temperatures. For example, in 5W-30, the first number indicates low-temperature fluidity, where 5W represents the ability to withstand temperatures as low as -30°C. The smaller this number, the better the low-temperature fluidity, making cold starts smoother for the car. The latter number represents the kinematic viscosity of the oil at 100°C. A higher value means the oil can maintain viscosity better at high temperatures, which can also be understood as better lubrication performance under high-temperature conditions. The method for changing the engine oil in the Haval M6 is as follows: Wait for the engine temperature to drop, allowing the oil to flow back into the oil pan; use a wrench to loosen the oil drain plug and place an oil pan underneath to catch the old oil until no more oil flows out. Start the engine and let it run for 30 seconds to allow the oil in the main oil passage to drain out; use a special wrench to remove the oil filter; apply some oil to the oil seal of the new oil filter and tighten it clockwise by hand; add the new engine oil through the oil filler cap on the engine valve cover, generally filling up to three-quarters of a standard oil bottle; start the engine and let it run for 5 minutes, then check for any leaks around the oil drain plug and oil filter, and repair if necessary; after stopping the engine, pull out the dipstick to ensure the engine oil level is within the standard range.
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What Causes the Seat Belt Not to Retract?

Seat belt not retracting to its original position is often caused by dirt accumulation. Proper cleaning can resolve the issue. Below are the details: 1. Over time, oil and grime (mainly from hand sweat and oil when pulling the belt) accumulate on the seat belt, causing it to harden and get stuck at the hook above the seat. 2. The friction contact area between the seat belt webbing and the B-pillar buckle accumulates excessive dirt, preventing the belt from retracting. Use dish soap or a cleaner to wash it, and the belt will function normally once dry. 3. If the seat belt slide is too close to the B-pillar, the retractor and webbing may not align properly, hindering retraction. Installing a spring washer or adjusting the slide slightly away from the B-pillar can help. 4. Obstruction of the lower guide wheel may prevent proper retraction. Remove the trim panel, clear debris or dust near the wheel, and clean it with a suitable cleaner.
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What is the Meaning of Car Coating?

Car coating refers to the application of a special chemical agent onto the car's paint surface. This agent undergoes a chemical reaction on the paint surface, forming a thin, hard, and transparent protective film that shields the paint from external dirt, impurities, and other contaminants for a certain period. Additional Information: 1. Car coating is the highest level of paint protection, preventing oxidation and offering multiple benefits such as enhancing paint brightness, resisting acids and alkalis, anti-oxidation, and UV protection. 2. Since the coating material itself is an inorganic substance, it does not harm the car's paint. Typically, during the coating process, aged, discolored, or brittle paint layers, as well as oxidation layers formed from long-term corrosion, are removed. This increases the paint's hardness and prevents minor scratches and swirl marks.
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Why can't the car start with one key?

The main reasons why the car cannot start with one key are: 1. The smart key for one-key start is low on battery. The system cannot detect the weak signal emitted by the key. In this case, you should place the smart key on the start button and then press the button to start. 2. Incorrect gear position. For automatic transmission cars, the gear must be in P (Park) or N (Neutral) to start. If it is in R (Reverse) or D (Drive), the car will not start. 3. Dead battery. This could be due to leaving the headlights on for too long or the battery reaching the end of its lifespan. Generally, the battery should be replaced every 2 years. 4. Out of fuel. If the fuel gauge shows below the red line, the car will not start. Also, pay attention to the quality of the fuel.
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Are Engine Oil and Transmission Fluid the Same?

Changing engine oil and transmission fluid are not the same. Below are the main differences between engine oil and transmission fluid: 1. Nature: Engine oil is the lubricant for the engine. Transmission fluid is used to keep the gear system clean. 2. Function: Engine oil lubricates and reduces friction in the engine, assists in cooling, seals against leaks, prevents rust and corrosion, and acts as a shock absorber. It is often referred to as the 'blood' of the car. Transmission fluid ensures the proper functioning of the transmission and extends the lifespan of the transmission system. 3. Characteristics: The engine is the heart of the car, containing many metal surfaces that rub against each other at high speeds and under harsh conditions, with operating temperatures reaching 400°C to 600°C. Transmission fluid provides effective lubrication even in low temperatures and reduces fluid loss under severe operating conditions. Depending on the transmission type, transmission fluid is further categorized into automatic transmission fluid (ATF) and manual transmission fluid.
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Choosing Between a Sedan or SUV for Your First Car?

It is necessary to make a rational choice based on your personal circumstances. Below are the main differences between sedans and SUVs: 1. Purpose: Sedans are not suitable for long-distance travel, while SUVs are ideal for long trips or traversing rough, mountainous, and water-crossing roads. Sedans are mostly used for household or business purposes. 2. Comfort: The visibility in sedans is inferior to that in SUVs. SUVs offer better driving visibility due to their height, but the interior space depends on the vehicle's size. However, the seating comfort in SUVs is not as good as in sedans. 3. Handling: Sedans are much more agile than SUVs, giving them an advantage in high-speed turns and lane changes. However, sedans are less safe compared to SUVs. 4. Driving Performance: 95% of SUVs in the world handle better than sedans on bumpy roads, while sedans outperform 95% of SUVs on well-paved roads.
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