Remove the left connecting rod
First, let’s start removing the left connecting rod, it is easier to remove it, since the right connecting rod is connected to an asterisk. Standard thread on both connecting rods.
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First you need to remove the dust cap. Then unscrew the connecting rod bolt in the place where the connecting rod connects to the carriage. Most often, a hex wrench is needed, but there may be options. it all depends on the brand of the connecting rod.
- You should see the threads inside the connecting rod and the bottom bracket shaft.
Unscrew the handle of the connecting rod puller slightly, as shown in the figure, the puller pusher should be hidden in its threaded part.
Screw the puller carefully into the connecting rod. The puller must enter to the full depth, since when removing the connecting rods, a lot of force will be applied to the threads.
Turn the puller handle clockwise, so the pusher will be screwed into place of the bolt securing the connecting rod. The connecting rod with some effort should be removed from the carriage.
Removing the pedals
When removing the pedals, you need to pay attention to the following: the right pedal from the chain side is unscrewed as usual counterclockwise, the left pedal is unscrewed on the contrary. clockwise.
Take a wrench of a suitable size and unscrew the pedals by engaging the wrench on the pedal at the very edge of the crank.
Hold the pedal with your free hand to prevent it from falling to the floor.
Removing the wheels
Loosen the nuts on the dropouts and remove the wheels.
- The nuts must be loosened so that the wheels can be easily removed.
Remove the plug
Pull the fork out of the frame so as not to lose the bearing ring from the bottom cup.
Pulling up, remove the bearing ring and cup from the frame.
Remove the retaining ring
The circlips on single gear bikes are located on the outer threads of the rear wheel hub. These rings are designed to secure the rear sprocket and prevent it from loosening when the pedals rotate backward. Therefore, the retaining ring is twisted on the bushing in the opposite direction, which contributes to a tight clamping of the sprocket. The thread on the retaining ring is directed in the opposite direction, this prevents the sprocket from unscrewing while the bike is moving forward.
Take a snap ring puller and position it with one notch side.
Turn the puller clockwise to unscrew the retaining ring.
Remove the steering wheel
Unscrew the bolts located on the stem of the steering column, they tightly fix the steering wheel in one position.
Do not lose the lock plate after removing the last bolt.
How to disassemble a bike
Cycling is becoming more and more popular; it is a versatile form of transport both for moving around the city and just for outdoor activities. In the process of using a bicycle, it becomes necessary to disassemble and then assemble the bicycle or its component parts.
The single-gear road bike is the most popular type of bike in the city and is easy to maintain. The article discusses how to disassemble a bike of this type.
It is best to disassemble the bike on a clean floor so that dirt and debris do not stick to the lubricated parts of the bike. Any physically healthy person can disassemble a bicycle with the necessary tools in a few hours maximum.
Here are the basic steps for disassembling a bike:
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The steps do not have to be performed in order, however, if you disassemble the bike in the sequence indicated in the article, then it will take less time and the work will be easier to complete. You can use a repair stand to disassemble the bike, but this is not necessary.
Bicycle sprocket repair
Maintenance and repair of a bicycle sprocket in the VeloMasterskaya company at affordable prices!
The sprocket is called the driven wheel of the chain drive. The sprockets are mounted on the rear hub of the bike. Single-speed bicycles have only one sprocket, but most modern bicycles for various purposes have multiple sprockets. The sprocket package or cassette is mounted on a ratchet that provides the bike’s free-wheeling function.
Our bicycle workshop has included in the list of services the maintenance and repair of the bicycle sprocket as an integral part of the planned preventive maintenance of bicycles.
The arrangement of different cassettes is approximately the same. Their number is different. from 5 to 9. If the sprockets are not connected to each other in a non-separable block, then they can be changed, for example, in case of wear. The sprockets do not wear out the same way. sprockets with smaller diameters are subject to the greatest wear. However, it also depends on the riding style and physical fitness of the cyclist.
The sprocket pitch must match the pitch of the chain links. Only the chain is lubricated, this is quite enough. Rinse the chain and change the lubricant on it regularly (preferably every 100 km), since a lot of dirt and dust accumulates on it, which adhere to the lubricant. Abrasive dust particles contribute significantly to chain and sprocket wear. Periodically, during walks or sports competitions, you should check the condition of the stars: remove the grass, remove dirt, stones or other debris that has accumulated between the stars. This simple procedure will prolong the life of both chains and stars.
Some brands of cassettes have their own ratchet bushings equipped with two ball bearings. When carrying out maintenance of the sprockets, it is advisable to flush the bearings and replace the grease in them.
Worn sprockets cannot be repaired and must be replaced. Repair of the rear sprocket of a high-speed bike is due to the fact that these elements are made of light alloys. Lightweight bicycles are equipped with cassettes made of anodized aluminum alloy. These sprockets are very lightweight and wear out quickly, although they have a high price tag. Sprockets made of titanium alloys have a low weight, are durable, and are used in the best cassettes. Sprockets for high-speed bicycles are replaced with new ones at the first signs of wear, since it is not about their price, but about sports results.
Most common road or city bikes have inexpensive mild steel sprockets, nickel plated or chrome plated. Their resource is quite enough for several seasons. The hardness of the material from which the chain is made and the hardness of the material of the sprockets are quite close, due to which a relatively low wear of the chain drive is achieved. Bicycle rear sprocket repair in this case mainly consists in replacing the cassette ball bearings.
Regardless of what metals your bike sprockets are made of, and what their design is, we will carry out repairs efficiently, quickly, using only original spare parts.