Bicycle is a common means of transportation, many people will have a bicycle at home. But it's very troublesome for a bicycle to break down, and now it's hard to find a bicycle repair shop. I would like to share with you the common troubleshooting methods of bicycles, hoping to help you.
Bicycle maintenance methods
1. Clean the guide wheel of rear chain puller
Turn the crank in one hand, hold a rag in the other hand, and squeeze the teeth of the guide wheel with the index finger and thumb to clean the teeth.
2. Clean the flywheel
Put the cloth between the two teeth and drag the cloth to wipe the teeth back and forth until each tooth is cleaned. However, the toothed disc cleaning line sold by bicycle shops is more convenient to clean the flywheel.
3. Clean the chain puller, flywheel and disc
The mud on the chain puller, flywheel and tooth disc can be cleaned with short brush and detergent. After brushing the chain gear and flywheel, the brush will be stained with oil, so the same brush can not be used to clean the frame and transmission system, otherwise the oil stained brush will pollute the bicycle. Remember to dry it with a rag after brushing.
Prevention of puncture, tire repair and tire wall tear
1. Prevent puncture
The best way to prevent puncture is to install a good quality outer tube, especially the puncture resistant one.
In the process of riding, always check whether the tire is worn.
Some people are used to self fluid or vacuum tire. Some people think that the puncture rate is basically zero if vacuum tire + tire fluid is used. There are very few people who use vacuum tires for bicycle travel, so this book will not discuss them. The tire self replenishing fluid can quickly stick to the small hole after puncturing, or the inner tube that has been filled with the tire self filling fluid can also be selected.
The tire self replenishing fluid can not make up the opposite perforation near the rim.
2. Treatment and causes of puncture
1. Simple puncture is easy to handle
Whether it is common inside and outside, or vacuum tire, the simplest way is to change the spare tire. The way to change the tire: just take the tire off: take the air nozzle core off the rim, replace it with a new inner tube, and then install the outer tire. If the tire is not removed quickly, it is not possible to remove the tire with a finger.
To pay attention to a link: before changing a new tire, first clear the sharp objects or glass on the outer tire, and then use your hand to touch the inside of the tire to check whether there are sharp objects. When touching, be careful not to be pierced by sharp objects, glass, etc. in the tire.
Remember to carefully check the sharp objects that cause puncture on the outer tire. If you do not carefully check, you can directly replace the new tire. Then, the new tire may be pricked after sufficient air injection.
2. The cause of the inner tube itself
Sometimes the puncture is not pierced by foreign objects, but the inner tube itself. Especially when it's hot, when you pinch the brake or go down a steep slope, it's easy to blow out the tire near the valve on the side of the rim. The air leakage was very fast. The inner tube was punctured with two holes close to each other. The reason is that when the tire pressure is insufficient, there is a hard and thin edge object on the road, and suddenly ride over, and the tire pressure is insufficient, resulting in the fierce collision between the inner tube and the rim.
Check the rim carefully after puncturing the tire: whether the tire burst was pierced by the spokes or the spoke cap, by foreign matters in the rim, or by the edge of the spoke hole. A tire pad is a plastic or rubber strip that wraps around the rim to cover the spoke hole, protecting the rim and preventing the spoke hole from piercing the inner tube. Many tire pads are of poor quality, too narrow or easy to crack.
As mentioned in the section "inspection before riding", when a new car arrives, first check whether there are metal chips in the rim, change the puncture resistant outer tire, and have a good quality tire pad. These measures can effectively prevent puncture.
Some people like to use tire self fluid. However, if the hole in the inner tube is on the side of the rim, there is no way to repair the tire self filling fluid, because the centrifugal force is generated when the wheel rotates during riding.
3. Patch are used up, how to do?
When riding a bicycle, the order of handling the punctured tire is as follows: first change the spare tire, if the spare tire is not available, then repair the tire. If the patch is used up or not, what to do? Use insulating tape instead. As we mentioned above, the trick to wear tape and insulating tape when riding is to wrap them around the frame tube.
Some people have tried to tie a knot at the puncture of inner tube, which requires skill.
If the tire is worn out, try to reduce the damage to the tire and put it on the tire tire as much as possible. This method can reduce the risk of the flat tire leaving the rim when cornering.
3. Tire wall tear
Stone and glass can cut through the wall of the tire. Once the wall is torn or torn, the inner tube will squeeze out of the break. The tire patch will not work. You can only use the material as a reinforcing piece for temporary disposal.
The paper money is very strong, put it on the inside of the tire wall tear. You can also try using business cards, the outer packaging of energy sticks, a small piece of old tire wall, strong tape, cutting the belt of a roadside chair into an oval shape, and other things you can try. The operation method is as follows:
(1) Place banknotes or other materials used as reinforcement on the inside of the tear of the outer tube or roll up the inner tube. Add more layers to prevent the paper money from bulging out of the tear.
(2) The inner tube is slightly inflated. This prevents the "reinforcement" from shifting.
(3) Fit the inner tube to the rim. Pay attention to the close fitting of tire lip and rim, and the "reinforcing plate" is not displaced.
Maintenance method of bicycle
1. Life extension method of bicycle tire
The road surface is generally high in the middle and low on both sides, and bicycles must keep to the right. As a result, the left side of the tire is often more worn than the right side. At the same time, because the center of gravity is backward, the rear wheel generally wears faster than the front wheel. Therefore, after a certain period of use, the front and rear tires should be replaced, and the left and right directions should be changed. In this way, its service life can be prolonged.
2. Tips for repairing inner tube
Bicycle is a good tool for pedestrians to walk, go to work and travel. But in the process of cycling, the inner tube of bicycle is often pierced by sharp things, which brings inconvenience to travel. Here are two tips for repairing the inner tube. One is to stick several layers of medical adhesive tape (one layer is larger than one layer) on the small hole to ensure that the inner tube will not leak for a long time. Medical tape is also easy to carry. Another trick is to go to the store to buy a leak repair agent. Before the parade starts, when repairing your bicycle, you can fill in the inner tube of the bicycle. Once it is punctured, the leak repair agent can close the hole, so you can travel safely.
3. Treatment of tire slow deflation
Remove the valve core, let the air out of the inner tube, take half a teaspoon of talc powder, and fill it slowly into the inner tube with a cone funnel of hard paper. The problem of slow air leakage can be solved.
4. Do not use sewing machine oil for bicycles
Sewing machine oil is a kind of thin lubricating oil. If it is used for bicycles, the original grease in the car will be diluted and lost, thus reducing the lubricating performance and anti rust performance of the grease. Therefore, to the bicycle axle oil, the application of 30 oil or grease.
5. Tips for cleaning bicycles
Your bicycle has mud and dust, you can use clean flannelette or worn cotton sweater and trousers to wipe. Then you take a few pieces of castor seed, peel off the shell, wrap it with a fine flannelette, smash it, and use it to wipe the bicycle, it can make the paint as bright as new. After wiping the bicycle wheel rim and spoke, it can make it bright and shiny, and castor seed oil has anti rust effect. A little rain will not rust.
6. Tips for rust removal of bicycle chain
If your bicycle chain is rusty, first use the kitchen cleaner to wipe off the rust spots, and then clean the cleaning agent on the chain, and then wash it in diesel oil to make the bicycle chain return to its original state.
7. Tips for bicycle calibration
For newly purchased bicycles, a comprehensive correction should be made, and the loose screws, pins, shafts, handlebars, front forks, etc. should be tightened. The spokes on the wheel should be corrected and tightened according to the condition of the rim. Before fastening, the front, rear and center axle should keep a clearance of about 0.5 to 1 mm, so as to ensure light riding.
8. Tips for bicycle maintenance
For a new bicycle, a pair of plastic handle cover is needed to protect the brake handle and increase the friction between the handle and the hand. It is safer for cyclists, especially in summer. The installation method is: soak the handle cover with hot water, or sprinkle some talcum powder inside the handle cover, so it is easy to put it on. If the saddle is equipped with cloth, velvet or artificial leather seat cover, it not only protects the saddle, but also is soft and comfortable, and saves pants.
The rubber pedal cover can be covered on the pedal. Don't wrap the frame and front fork with plastic tape or wax cloth, otherwise the paint will fall off easily. However, cloth strips should be padded between the splint of the bell, handlebar, lock and the vertical fork of the frame, between the splint of the brake and the front fork leg, so as to prevent the electroplated coating and paint from being worn off.
9. Tips for bicycle use
You can pay attention to the following aspects when cycling, your bike will be used for a long time, convenient for you and travel. In case of uneven and potholes, ride slowly at a low speed, so as to avoid the screw loosening and sliding buckle falling off caused by sharp crack and vibration. You do not want to ride at high speed or curve, but also pay attention not to brake suddenly, especially to prevent iron chips, glass and other things from puncturing the inner and outer tires. It is strictly forbidden to drive with overload. The load of ordinary type vehicle shall not exceed 120 kg, and that of heavy bicycle shall not exceed 170 kg. Special attention shall be paid to avoid unilateral load to prevent body deformation. Don't take people by bike, violate traffic rules.
10. Proper inflation of bicycle tires
Pay attention to proper amount of inflation for bicycles. If the tire is under inflated, the resistance will increase, and the driving will be laborious, and the outer tire wall will be easily broken; if the tire is inflated too much, the wheel will lose its elasticity, and the bumps will be severe when driving. If the outer tire is stressed too much, the cord layer in the tire will be easily broken, which will shorten the service life. In addition, when bicycles are not used for long-term storage, they should also be properly inflated
11. Tips for even tire force
The front wheel of the bicycle is worn seriously on both sides of the tire because of turning; the rear wheel is under more pressure, so the front tire wear is faster. It is better to replace the front and rear tire outer tubes once a year, and change the left and right directions of the front and rear wheels, so that the wear degree of the two outer tires is roughly the same. When you go to the bicycle repair shop for maintenance, please ask the master to replace it for you.
12. Tips for bicycle parts maintenance
The electroplating layer of bicycle is dusted off with dry cloth and coated with neutral oil (such as sewing machine oil); the paint film of bicycle body is brushed with chicken feather broom. It is not allowed to wipe with oil or exposed to the sun; for bicycles coated with varnish, it is not allowed to polish with wax, and the paint will fall off; after the bicycle is drenched in the rain, dry cloth should be used to absorb moisture to prevent rusting; grease or lubricating oil should be often added to the axle, flywheel, front fork and pedal of bicycle, and some thin oil should be added to the flywheel. The bicycle is cleaned with kerosene once a year. Pay attention not to put the bicycle near the heating, kitchen, coal stove and other places to avoid carbon monoxide corrosion.
13. Tips for bicycle pedaling
The main reason is that the spring inside the flywheel is out of order, worn or broken. The repair method is to clean the flywheel with kerosene to prevent the spring from sticking, or to correct or replace the spring.
14. Tips for repairing wheel out of roundness
The out of roundness of bicycle wheels is due to the uneven tightness of various parts of the strips. During adjustment, chalk can be used to measure the flat part of the rim. Then loosen the strips in this area and tighten the strips at the wider ones to correct them.
15. Tips for repairing bicycle brake failure
Bicycle brake failure is very dangerous, especially when traveling. Tips: first loosen the nut of the loose brake and tighten the brake so that the distance between the brake shoe and the rim is 3-5mm, and then tighten the nut. If the left and right brake shoes are asymmetric, install the front and rear wheels, or eliminate the axial drift of the rim, or correct the brake fork.
