The procedure for replacing the bearing of the rear wheel of a bicycle
The rotational motion of the wheel is provided by its axle. the hub. In turn, the hub works thanks to the hinge mechanism, which is built into it and ensures uniform transmission of forces and movement of the bike. Bearing wear affects the bike‘s performance negatively and prevents the mechanism from functioning.
Disassemble the hub to lubricate and replace worn bike bearings. With the rear wheel, you have to tinker a little, because in order to get to the hub, you first need to remove the cassette with sprockets. In the case of single-speed bikes, you also need to dismantle the retaining ring and the sprocket itself.
The rear wheel disassembly procedure is as follows:
Disassembly. First, remove the wheels from the dropouts. Using a cassette remover, we disassemble the stars. Open the stopper with a screwdriver or a special tool. Then, from the side opposite to the stars, unscrew the fastening nuts using a 15 spanner. Replacement / cleaning. We remove the bearing assemblies and washers. We sort out the separator mechanism or change it to an industrial one. We replace industrial bearings with new ones. We clean the parts or replace the damaged components of the assembly. When replacing cage bearings, lubricate the assembly. When installing industrial ones, we lubricate only the inner sides of the bushing and the axle.
Important: if you are replacing worn-out parts with new ones, pick them up with the same characteristics as the old ones. Assembly. We do everything in the reverse order during disassembly.
Consider the importance of correctly fitting the parts. Pay attention to this when disassembling. In order to avoid backlash or deterioration of the quality of the wheel, all parts must be installed evenly, without distortions, exactly in the location in which they were originally. After assembly, it is necessary to check the operability of the wheels. If the parts are installed correctly, this will be evidenced by smooth running without backlash.
When to Service the Rear Hub
To ensure that the bike parts are always in perfect technical condition, they must be regularly serviced. If we consider the rear hub of a bicycle, then for it you will need:
- periodically tighten the body;
- regularly change the bearing balls;
- at the next disassembly, lubricate all internal parts of the case;
- adjust the brake hub from time to time.
How To Remove And Refit The Brompton Rear Wheel
Dismantling the rear wheel itself is as easy as shelling pears, but the process of removing and disassembling / assembling the rear bicycle hub is much more difficult. And nevertheless, without such regular maintenance of the part in question, it may soon need to be overhauled or replaced.
Signs that indicate an urgent need for service on the rear bicycle hub:
- when driving, there is a strong wheel play;
- the crunch of bearings is clearly audible (this means that they are simply worn out);
- on the go, the bike body rattles and staggers;
- rolling dynamics is bad.
Bicycle Freewheel Disassembly/Assembly
It is worth knowing some of the features of eliminating a particular symptom:
- If the rear hub casing is spinning, its looseness, then this can be eliminated by tightening the fastening nuts.
- If the movement of the rear wheel is difficult, then it may be necessary to loosen the retaining nut a little. most likely, too much force was applied when tightening it.
- If extraneous sounds appear when the bike is moving and the roll-forward deteriorates, you will need to replace the bearings or completely lubricate the rear hub housing.
Elimination of basic problems
All detected faults should be eliminated immediately in order to avoid bad consequences. To remove the backlash, you need wrenches. Basically, this is a 15 cone tool and a 17 open-end wrench. You must first unscrew the locknut and then, depending on the situation, loosen or tighten the flare nut. Ideally, there should be no backlash at all. After handling the taper fastener, replace the locknut. The correct adjustment of the flare nut will be indicated by slight turning of the wheel due to the force of gravity perceived by the reflector or nipple.
First, remove all unnecessary items from the bike that may be on it. And it is also better to unscrew all kinds of mirrors, flashlights and other little things that can be damaged during work.
- We turn the bike upside down, put it on the handlebar and seat. You can do without a special rack for repairing a bicycle, the main thing is to give it a stable position.
- We find out the type of brakes installed for further action. As usual, these are disc or rim brakes:
- disc brake. It will be easier to remove the wheel with it;
- The rim brake of the V-brake type must first be released and removed, otherwise further dismantling of the wheel will no longer be possible. (It is not difficult to release the brakes, for this you need to move the cable to the side of the fastening screw, move the levers, removing the end of the cable from the clamp, lower it down and spread the brake levers to the sides).
- Then we act depending on the type of fastening of the rear wheel to the bicycle axle. We unscrew the nuts with a wrench (one or two) or, if the mount is a disc eccentric, unscrew the brake lever and twist the wheel.
- The chain passing through the gearshift system is neatly removed from the sprockets.
The wheel is removed. Now you can carry out all the necessary further manipulations: replacement, adjustment, lubrication of parts.
Replacing the camera
First of all, you need to lower the wheel. unscrew the cap and release the air by pressing the nipple. If the chamber is damaged and there is no air in it, simply remove the cap. To remove the tire, you will need mounting paddles, with which it will be convenient to pry on the tube until it becomes easy to pull it off the rim.
The camera can be replaced without the need for tools. First, the nipple is inserted into the hole in the rim, after which the tire is evenly put on the rim. Finally, the camera needs to be pumped up to the desired state.
When to remove the rear wheel
It is unlikely that the idea of unscrewing the chassis from the bicycle frame would just come to mind, unless, of course, a person specializes in bicycle dismantling. But this is a completely different case. Dismantling the rear wheel will be required if the following problems are observed:
- noticeable damage to the rim;
- complete wear when a wheel needs to be replaced;
- a flat tire or a burst tire;
- bulkhead bushing.
This includes the planned replacement of the rear sprocket system and chain.
Usually one wrench of the appropriate size is enough, with which the nuts are removed one by one. If the hub axle turns, then the nuts are unrolled simultaneously in different directions. It is recommended to use open-end wrenches or box wrenches. The adjustable version is undesirable, as its thick horns eat up the corners of the nut due to a loose fit and sliding.