How to remove the rear ratchet on a bike

Ratchet puller

When pedaling, a rather large moment is transferred through the chain to the wheel axle, in particular, when driving downhill. With exactly the same force, the inside of the ratchet is threaded to the rear wheel hub.

Always, to unscrew a long-established “nut” requires a decent effort, which can only be transferred with the help of prepared tools. These tools include a slotted bushing-like puller and a large wrench.

The ratchet remover cannot be replaced with a similar but cassette-specific attachment. They should not be confused as they have absolutely incompatible splines.

How to disassemble and remove a ratchet on a bicycle

The bicycle ratchet, popularly also known as the nut, is a ratchet mechanism that allows you to reliably transmit torque through the chain from the pedals and at the same time coast freely without the need to pedal continuously. This mechanism is assembled as a single piece with the rear wheel hub. Consists, in fact, of the ratchet itself in the form of a toothed drum with two pawls and a non-separable cassette of sprockets.

Simple maintenance of the bike transmission boils down to cleaning it from dirt and grass that gets clogged between the sprockets.

You will need to remove the ratchet from the bike in the following cases:

remove, rear, ratchet, bike
  • To adjust the tightening of the rear wheel hub bearings. You can not remove anything, but with the cassette of sprockets unscrewed, it is much easier to remove the ball bearings, determine the degree of wear of the cup, lubricate the assembly.
  • If possible, to replace broken dogs. Although such small parts are not sold individually, and most often you will need to buy the entire assembly, they can be removed from the old ratchet. Unfortunately, there are times when, as a result of the premature death of the dogs, the drum with asterisks either gets jammed, or it starts to rotate freely in both directions.
  • When the teeth of the smallest stars are worn out to the extreme or if one of them breaks.
  • To install the spoke into the rear wheel hub on the right side, to replace the broken.

Removing the Ratchet from the Bicycle

How to disassemble the ratchet is clearly demonstrated in the following video:

The difference between a ratchet and a cassette

Do not confuse a bicycle ratchet with a cassette, as they are not interchangeable. Currently, the former can only be found on old and very cheap bicycles. On modern bicycles, a more advanced part is used, such as a cassette.

The main drawback of the ratchet is its incompatibility with the 15 mm diameter hollow shaft of the new QR15 standard. Loose loading from off-center sprockets can cause local bending on the hollow axis.

On the inside of the ratchet there are ratchet pawls, on top of it an external bushing with sprockets is installed. The role of the nut holding these two parts is played by the cone, which is the working surface for the ball bearing. Inside there are two bulk bearings, each of which is assembled from balls of the same size.

The hidden part of the ratchet. the inner sleeve. is screwed onto the threaded part of the rear wheel, and to remove it, you need a special puller.

Unscrewing a stuck ratchet

It so happens that there is not enough effort to disrupt a rattle that has been tightly tightened for several years. In this case, lengthening the key lever will help.

Many people in the garage have an iron pipe or bar about 60 cm long.Then you can simply put this pipe on the handle of an adjustable wrench or the tooth of an open-end tool, or do something tricky and assemble a two-arm lever.

  • Take a couple of short, 6-8 cm long bolts M8 or M10 and pick up two corresponding nuts for them.
  • Insert one of the bolts into the hole in the ratchet puller, and thread the other through the hole in the handle of the adjustable wrench. These bolts should be secured with nuts to hold them in place.
  • We insert the pipe between two bolts: the puller installed in its place and the adjustable wrench put on it. Now all that remains is to push the resulting lever down to disrupt the ratchet.

Usually with a lever from 50 to 60 cm, any rattle is unscrewed in almost one motion.

Ratchet puller

When pedaling, a fairly large torque is transferred through the chain to the wheel axle, in particular, when driving downhill. With exactly the same force, the inside of the ratchet is threaded to the rear wheel hub.

Always, to unscrew a long-established “nut” requires a decent effort, which can only be transferred with the help of prepared tools. These tools include a slotted bushing-like puller and a large wrench.

Bicycle pullers: for ratchet. left and two different designs, but interchangeable, for the cassette. on right

Replace Hub Ratchet Ring

The ratchet remover cannot be replaced with a similar but cassette-specific attachment. They should not be confused as they have absolutely incompatible splines.

The difference between a ratchet and a cassette

Do not confuse a bicycle ratchet with a cassette, as they are not interchangeable. Currently, the former can only be found on old and very cheap bicycles. On modern bicycles, a more advanced part is used, such as a cassette.

The main drawback of the ratchet is its incompatibility with the 15 mm diameter hollow shaft of the new QR15 standard. Loose loading from off-center sprockets can cause local bending on the hollow axis.

For a ratchet, the smallest sprocket is not smaller than with 14 teeth, but its more modern modification. cassette. may have even smaller sprockets, with 11 or 12 teeth

On the inside of the ratchet there are ratchet pawls, on top of it an external bushing with sprockets is installed. The role of the nut holding these two parts is played by the cone, which is the working surface for the ball bearing. Inside there are two bulk bearings, each of which is assembled from balls of the same size.

READ  What is the radius of the wheels on a bicycle by height

Concealed part of the ratchet. inner sleeve. screwed onto the threaded part of the rear wheel, and to remove it, you need a special puller.

Internal ratchet bushing

Ratchet puller

When pedaling, a fairly large torque is transferred through the chain to the wheel axle, in particular, when driving downhill. With exactly the same force, the inside of the ratchet is threaded to the rear wheel hub.

Always, to unscrew a long-established “nut” requires a decent effort, which can only be transferred with the help of prepared tools. These tools include a slotted bushing-like puller and a large wrench.

Bicycle pullers: for ratchet. left and two different designs, but interchangeable, for the cassette. on right

The ratchet remover cannot be replaced with a similar but cassette-specific attachment. They should not be confused as they have absolutely incompatible splines.

Unscrewing a stuck ratchet

It so happens that there is not enough effort to disrupt a rattle that has been tightly tightened for several years. In this case, lengthening the key lever will help.

Many in the garage will find an iron pipe or bar about 60 cm long.Then you can simply put this pipe on the handle of an adjustable wrench or the tooth of an open-end tool, or do it in a tricky way and assemble a two-arm lever.

  • Take a couple of short, 6-8 cm long bolts M8 or M10 and pick up two corresponding nuts for them.
  • Insert one of the bolts into the hole in the ratchet puller, and thread the other through the hole in the handle of the adjustable wrench. These bolts should be secured with nuts to hold them in place.
  • We insert the pipe between two bolts: the puller installed in its place and the adjustable wrench put on it. Now all that remains is to push the resulting lever down to disrupt the ratchet.

Usually with a lever from 50 to 60 cm, any rattle is unscrewed in almost one motion.

  • After you have disassembled the nut, notice the color of the grease inside it. The black oil, so to speak, dirty or with noticeable metal particles, indicates the extreme wear of the working surfaces of the dial bearings. In this case, it would be more correct to replace the entire assembly with a new one.
  • The removed ball bearings should be cleaned of grease and then inspected for damage. Balls with dents and dark spots must be replaced with undamaged ones.
  • Always check the interior surfaces for moisture before assembly. If there are still water droplets, then they must be dried with an ordinary household hairdryer or compressed air from a compressor.
  • The flare nut must be tightened with force, and the adjustment of a small backlash for the ratchet sprockets relative to the wheel axis should be made using set thin rings.

The method is good in that it will be used as a lever, incl. branches or sticks, the main thing is to withstand. And the bolts, if necessary, can be picked up on the road or found in the garage, at the junkyard, etc. Those. even in the field, it is quite possible to unscrew the ratchet (the puller itself must, of course, have with you, but it is light).

Manufacturers can install single or multi-speed transmissions on their bicycles. In the case of the latter category of nodes, a ratchet or cassette is installed on the rear wheel. Cassettes have a higher cost, since the ratchet is used mainly in budget models.

It is quite simple to disassemble them at home. In this article, you will familiarize yourself with the main features of the process and learn how to remove the ratchet from a bicycle wheel quickly and with minimal effort.

Tool for work

  • Ratchet puller.
  • A larger adjustable wrench or a wrench, usually 27 mm, but note that there are pullers with 24 mm edges. It will be more convenient to use a box or socket wrench, since it will be possible to press on it with the maximum possible force, without fear that it will jump off the edges of the puller.
  • Open-end wrench 14 or 15 mm for unwinding the sleeve.
  • Thick lint-free rag.
  • Thin center punch, if you need to disassemble the “nut”.
  • The hammer never hurts.
  • Non lithium grease. Thick oil generously packed inside the assembly can cause the dogs to stick. After that, the pedals often begin to scroll not only backward, but also forward.

Unscrewing a stuck ratchet

It so happens that there is not enough effort to disrupt a rattle that has been tightly tightened for several years. In this case, lengthening the key lever will help.

Many in the garage will find an iron pipe or bar about 60 cm long.Then you can simply put this pipe on the handle of an adjustable wrench or the tooth of an open-end tool, or do it in a tricky way and assemble a two-arm lever.

  • Take a couple of short, 6-8 cm long bolts M8 or M10 and pick up two corresponding nuts for them.
  • Insert one of the bolts into the hole in the ratchet puller, and thread the other through the hole in the handle of the adjustable wrench. These bolts should be secured with nuts to hold them in place.
  • We insert the pipe between two bolts: the puller installed in its place and the adjustable wrench put on it. Now all that remains is to push the resulting lever down to disrupt the ratchet.

Usually with a lever from 50 to 60 cm, any rattle is unscrewed in almost one motion.

  • After you have disassembled the nut, notice the color of the grease inside it. The black oil, so to speak, dirty or with noticeable metal particles, indicates the extreme wear of the working surfaces of the dial bearings. In this case, it would be more correct to replace the entire assembly with a new one.
  • The removed ball bearings should be cleaned of grease and then inspected for damage. Balls with dents and dark spots must be replaced with undamaged ones.
  • Always check the interior surfaces for moisture before assembly. If there are still water droplets, then they must be dried with an ordinary household hairdryer or compressed air from a compressor.
  • The flare nut must be tightened with force, and the adjustment of a small backlash for the ratchet sprockets relative to the wheel axis should be made using set thin rings.

Manufacturers can install single or multi-speed transmissions on their bicycles. In the case of the latter category of nodes, a ratchet or cassette is installed on the rear wheel. Cassettes have a higher cost, since the ratchet is used mainly in budget models.

It is quite simple to disassemble them at home. In this article, you will familiarize yourself with the main features of the process and learn how to remove the ratchet from a bicycle wheel quickly and with minimal effort.

READ  How to remove a camera from a bicycle wheel

The ratchet mechanism is widely used on sprocket speed systems and includes rear sprockets, drum, ring and bearings. Integrated freewheel prevents the sprockets from spinning backwards, thus maintaining the direction of movement of both the sprockets and the chain.

A feature of the ratchet on a bicycle for high-speed cycling is its complete replacement in case of critical wear of the stars. The system is screwed onto the thread of the rear wheel hub, which is fundamentally different from the cassette. In addition, one worn sprocket can be replaced on cassettes, which cannot be done on a ratchet.

The mechanism is operated under dynamic conditions, which is why it will sooner or later become unusable. We will talk further about the signs of failure and how to remove and change the ratchet yourself.

Removing the rear bicycle sprocket ratchet. Removing, disassembling and installing the ratchet on a bicycle

The main »Repair and maintenance» Removing the ratchet of the rear bicycle sprockets. Removing, disassembling and installing the ratchet on a bicycle

Bicycle ratchet, popularly also known as walnut. a ratchet mechanism that reliably transfers torque through the chain from the pedals and at the same time freely coasting without the need to pedal non-stop. This mechanism is assembled as a single piece with the rear wheel hub. Consists, in fact, of the ratchet itself in the form of a toothed drum with two pawls and a non-separable cassette of sprockets.

Simple maintenance of the bike transmission boils down to cleaning it from dirt and grass that gets clogged between the sprockets.

You will need to remove the ratchet from the bike in the following cases:

  • To adjust the tightening of the rear wheel hub bearings. You can not remove anything, but with the cassette of sprockets unscrewed, it is much easier to remove the ball bearings, determine the degree of wear of the cup, lubricate the assembly.
  • If possible, to replace broken dogs. Although such small parts are not sold individually, and most often you will need to buy the entire assembly, they can be removed from the old ratchet. Unfortunately, there are times when, as a result of the premature death of the dogs, the drum with asterisks either gets jammed, or it starts to rotate freely in both directions.
  • When the teeth of the smallest stars are worn out to the extreme or if one of them breaks.
  • To install the spoke into the rear wheel hub on the right side, to replace the broken.

Required tools for removing the ratchet

It is quite simple to carry out the removal procedure yourself. All you need is to acquire the appropriate set of tools. So, before removing the ratchet from the wheel, you must use the following tools:

  • special puller;
  • an adjustable or wrench of 24 or 27 millimeters, depending on which model of the part is installed on your bike;
  • a 15 mm open-end wrench, with which it is necessary to remove the bushing from the wheel;
  • a L-key is also used, but in very rare cases;
  • if the design provides for the presence of a “nut”, you will need a center punch with thin edges.

KLR 650. Rear spring swap with ratchet straps

If the purpose of removal is routine maintenance rather than replacement, you will also need a non-lithium grease.

How to remove a ratchet from a bicycle wheel correctly without damaging the mechanism?

Manufacturers can install single or multi-speed transmissions on their bicycles. In the case of the latter category of nodes, a ratchet or cassette is installed on the rear wheel. Cassettes have a higher cost, since the ratchet is used mainly in budget models.

It is quite simple to disassemble them at home. In this article, you will familiarize yourself with the main features of the process and learn how to remove the ratchet from a bicycle wheel quickly and with minimal effort.

How to remove the rear ratchet?

Before removing the rear ratchet, the rear wheel must be removed from the frame. To do this, raise it, shift the rear derailleur to the last speed (remember that after completing the replacement procedure, you will need to check and correctly adjust the front derailleur), and then unscrew the eccentric or nuts (depending on the hub design). Next, carefully pull the wheel out of the frame, which should also be matched to your height.

The next step is to remove the axle from the wheel hub. Take two adjustable wrenches. with one hold the nut in a fixed position, the other. unscrew the other nut.

Practice shows that in most cases the bicycle owner is faced with a problem when the thrust nut has become attached to the ratchet body. To fix this problem, you need to use WD-40 spray. Spray the nut and let the wheel sit for five minutes. The liquid will corrode rust and dirt inside, after which you can safely remove the part from the sleeve.

As you can see, it is quite easy to remove this part. But before you disassemble the bike ratchet, we recommend that you get a special tool. Without it, given the design of the fasteners, it is almost impossible to dismantle the ratchet. After successful removal, you can proceed with further disassembly of the component, proceed with routine maintenance or replacement.

When to shoot?

In most cases, removal of this transmission element is necessary when the cyclist wishes to carry out routine maintenance (usually in the spring or fall). Removal will also be required when the teeth of the sprockets installed in the structure are heavily worn. Since the vast majority of ratchets have a non-separable design, replacement of new sprockets is impossible. they are riveted to each other.

Spring removal on R6 motorcycle rear shock using ratchet straps for a spring compressor

It is urgent to dismantle the ratchet from the wheel if there is a situation when a sharp slip of the pedals is noted in the process of smooth pedaling. This effect is observed when the oil is incorrectly selected when you were preparing the bike for spring after storing it on the balcony in winter.

What is a ratchet?

If you frequently repair and service your bike, you might be wondering what is the difference between a cassette and a ratchet on a bike? The second is an integral part of the vehicle’s transmission, designed to change the pedaling effort. All modern ratchets are made of steel, since aluminum models tend to wear out, and given the pricing factor, the installation of this component is unprofitable for the manufacturer.

The cassette is installed on the bushing, it already contains a drum with “dogs”, which slides over the body when riding on a roll. In other words, there is a mechanism inside, consisting of pawls (hooks), which, when scrolling the pedals, catch on the protrusions on the body. When the cyclist stops pedaling, the force on the pawls is reduced to zero, as a result of which they slide over the body with the teeth. Removing the cassette yourself is much easier.

READ  How to glue the red sun bike camera

To understand how to remove a ratchet from a bicycle wheel, you need to watch a useful video.

How to remove sprockets from the rear wheel of a bicycle?

If this is a ratchet, then everything will be a little easier. If there is special equipment, then even a person who has nothing to do with bicycles can cope with this.

This requires only 2 tools:

  • special puller;
  • adjustable wrench.

First, of course, you need to remove the wheel. Then the stars are removed in two steps. It is necessary to insert the puller into the ratchet, and then try to turn it counterclockwise with a key.

If the mechanism has never been removed, then it can twist strongly (such is its property) and not give in even under great efforts. Then you need to spray the miraculous WD-40 spray there from the thread side. If you leave it like this for a few hours, then the ratchet can be easily removed. It should also be remembered that the larger the lever, the greater the effort. Therefore, you need to take the largest adjustable wrench. Do a couple of jerks and the ratchet will unscrew easily.

You will need another tool to remove the cassette. It’s called a whip. This is a handle to which a piece of a bicycle chain is attached. If you turn the cassette counterclockwise, it will start to rotate. This is where this whip will come in handy, which will hold her. Some craftsmen simply use a piece of an old chain instead of this tool. Then everything is the same as when removing the ratchet.

How to remove the rear ratchet?

The next step is to remove the axle from the wheel hub. Take two adjustable wrenches. with one hold the nut in a fixed position, the other. unscrew the other nut.

Advice! Be sure to place the whip chain on the largest star. Turn the puller with one hand, with the other hand hold the whip, preventing the ratchet from turning with the adjustable wrench.

Practice shows that in most cases the bicycle owner is faced with a problem when the thrust nut has become attached to the ratchet body. To fix this problem, you need to use WD-40 spray. Spray the nut and let the wheel sit for five minutes. The liquid will corrode rust and dirt inside, after which you can safely remove the part from the sleeve.

As you can see, it is quite easy to remove this part. But before you disassemble the bike ratchet, we recommend that you get a special tool. Without it, given the design of the fasteners, it is almost impossible to dismantle the ratchet. After successful removal, you can proceed with further disassembly of the component, proceed with routine maintenance or replacement.

The difference between a ratchet and a cassette

Do not confuse a bicycle ratchet with a cassette, as they are not interchangeable. Currently, the former can only be found on old and very cheap bicycles. On modern bicycles, a more advanced part is used, such as a cassette.

The main drawback of the ratchet is its incompatibility with the 15 mm diameter hollow shaft of the new QR15 standard. Loose loading from off-center sprockets can cause local bending on the hollow axis.

In a ratchet, the smallest sprocket is not smaller than with 14 teeth, and its more modern modification. the cassette. can have even smaller sprockets, with 11 or 12 teeth

On the inside of the ratchet there are ratchet pawls, on top of it an external bushing with sprockets is installed. The role of the nut holding these two parts is played by the cone, which is the working surface for the ball bearing. Inside there are two bulk bearings, each of which is assembled from balls of the same size.

The hidden part of the ratchet. the inner sleeve. is screwed onto the threaded part of the rear wheel, and to remove it, you need a special puller.

Internal ratchet bushing

The difference between a ratchet and a cassette

Do not confuse a bicycle ratchet with a cassette, as they are not interchangeable. Currently, the former can only be found on old and very cheap bicycles. On modern bicycles, a more advanced part is used, such as a cassette.

remove, rear, ratchet, bike

The main drawback of the ratchet is its incompatibility with the 15 mm diameter hollow shaft of the new QR15 standard. Loose loading from off-center sprockets can cause local bending on the hollow axis.

On the inside of the ratchet there are ratchet pawls, on top of it an external bushing with sprockets is installed. The role of the nut holding these two parts is played by the cone, which is the working surface for the ball bearing. Inside there are two bulk bearings, each of which is assembled from balls of the same size.

The hidden part of the ratchet. the inner sleeve. is screwed onto the threaded part of the rear wheel, and to remove it, you need a special puller.

To understand how to remove a ratchet from a bicycle wheel, you need to watch a useful video.

Signs and causes of rear chainring problems

To begin with, let’s take a closer look at the ratchet mechanism of a multi-speed bike in more detail.

Diagram of a non-brake ratchet mechanism: 1, 9. cone, 2. left flange, 3. body, 4. axle, 5. internal ratchet compartment with flange, 6. sprocket, 7. lock nut, 8. hub, 10. gasket, 12. bushing, 13. spring, 13. dog.

The pawl engages the rear wheel ratchet. The ratchet mechanism itself crackles slightly at the same time. This is the normal operation of the device. Otherwise, when there is no sound, it pulls the chain forward when driving idle.

The lack of engagement of the dog is usually associated with the malfunctioning of its spring, which pushes the dog. The following factors can serve as the reasons for malfunctioning:

  • absence or high density of lubricant in the mechanism;
  • breakage of the dog itself;
  • the spring is worn out;
  • a large amount of dirt;
  • part of the dog is inside the mechanism.

The cleavage of the dog itself can still be repaired separately, but with its seat the situation is much more complicated. It should be noted that this type of fastening of transmission stars is inferior to a cassette in terms of reliability, since an axle breaking in half is far from uncommon. You will have to completely remove the ratchet and install a new one.