How to Remove the System From a Bicycle

How to replace a chain on a bicycle?

The chain is the key element of the bike’s transmission assembly. Sequentially passing through the teeth of the drive sprockets, it transmits torque to the rear wheel, thanks to which the bike rides. In the process of movement, the chain mechanism is subjected to dynamic loads, which over time leads to its wear.

On singlespeeds, as a rule, the chain is designed for the entire life of its operation: when moving along the stars, it runs smoothly and straight, without deviations. Chains are more complicated on multi-speed bicycles: there is no right angle between the front and rear sprockets, which is why it is always at an angle relative to the frame. The stresses on the chain mechanism increase several times compared to the parallel transmission, which leads to periodic wear. To avoid damage to the entire transmission unit caused by wear of the chain, it must be replaced in time.

Not only do the “speed” chains need to be removed, they are often removed from single-speed bikes for periodic repairs or cleaning. How to remove the chain from the bike and put it back, we will tell you in this article.

Malfunction symptoms

First of all, attention should be paid to chain malfunctions on multi-speed bikes. Traditionally, the travel time is determined by the mileage, but these values ​​are too approximate, because everything depends on the conditions of cycling: road quality, gear selection, speed, load on the pedals and, accordingly, on the chainring.

The first signs of a bike chain failure are inaccurate gear shifting and suspicious sounds (provided the chain has not lost its lubrication). The following method will probably help to determine the malfunction: bend it away from the largest sprocket and see the number of free teeth. If the chain leaves three or more teeth freely, then replacement is required urgently. Two prongs “warn” that wear is not far off, but you can still ride.

Using the same method, you can see the weakening of the chain on a single-speed bike: bend it away from the chainring and see the number of teeth.

Another way to measure wear is to measure length:

  • 304.8mm. Optimum Chain Length.
  • 306.5. 307.5. average wear, suitability for repair. You can still ride.
  • 308 mm. high degree of wear on both chain and stars.
  • than 308 mm. damage to the entire transmission.

Measuring elongation requires removing the chain completely from the bike.

Lock and solid chain

The locking chain is equipped with a special clamping device. It is not difficult to unhook and put on it. you just need to disconnect the lock. To find it, we carefully examine the chain on both sides and find a detachable link. In principle, it will not be difficult to find it on a clean chain: a tick is put on top, which fixes the link and does not allow it to move apart. Also, the manufacturer’s inscription is usually embossed on the key link. If you cannot find the lock for a long time, then either the chain is dirty, or it is lockless, or solid.

A bicycle chain without a lock simply cannot be disconnected: all the links on it look the same, however, and are hooked to each other too. This is a great inconvenience when cleaning, for example, it is necessary to carry out a “general cleaning” in a solvent. In the case of the keylock, everything is simple. he stole it and put it in kerosene. Solid bike chain, even taken off the stars, will remain hanging on the frame.

In terms of removal, a chain with a lock is certainly more convenient than its counterpart. However, for some reason, the fastening may become loose: the tick fly off, and the link itself can be disengaged. There are no such weak points on bicycle chains without locks, and if it is torn, then the point is solely in its quality.

Opening the lock and pressing the link axis

Opening the lock is quite simple: use a screwdriver or other object (for example, a knitting needle) to pry on the clamp clamp. The main thing here is not to damage it, or even better. not to lose it, otherwise it will not be possible to fix the chain later. Next, we disengage the entire link. That’s it, you can remove the chain and do whatever you want with it: clean it, throw it away or shorten it. However, we’ll talk about this a little later.

A solid chain can only be disconnected with a special tool. a squeeze. With its help, it will be possible to easily disassemble the link without damage. The procedure is simple, but you shouldn’t rush:

  • First, select the link for disassembly.
  • We insert the chain into the position of pressing out and pressing in the pin (link axis).
  • Use the handle to tighten the screw and take out the axle. Extrusion direction. towards the pressing screw, that is, towards yourself.

You should not completely remove the pin, since it will not be easy to return it later.

The squeeze will loosen the axle a little, so a different link should be selected when re-disengaging. Pressing the axle into the link is carried out in the opposite order: connect the adjacent links together and press the pin with the screw.

Elimination of defects

A common form of wear is chain slack when chain length increases from original length. Previously, the critical values ​​of the length of the bicycle chain were considered, at which it cannot be used. Everything is correct, but the chain does not have to be thrown away immediately, but it can be repaired. Under prolonged loads, the axles loosen, which causes longitudinal and lateral expansion. It is impossible to eliminate the transverse, but it is quite possible to tinker with the longitudinal.

It is necessary to remove unnecessary links in such a way that the chain calmly, without interference, passes over the large star. With the help of a squeeze, excess links are removed, the axial shafts are completely pulled out from the removed elements. The main thing here is not to make a mistake and not pull out too many links.

If you have to ride with an extended chain, then in order to avoid its falling off, you can install so-called chain dampers. parts that prevent the chain from flying off when driving. There are several types of such devices:

  • Roller with two clips.
  • Wide rollers.
  • Frame (or rollerless).

Using pacifiers as protection is fine, but it would be better to consider changing the circuit.

Fitting the chain to the bike

To put the chain on the singlespeed, it is enough to hang it on both stars, press in the pin or click the lock. With high-speed bikes it will be a little more difficult:

  • Fix switches to small stars.
  • Considering the position of the tensioning rollers, put the chain on the stars.
  • Combine links.
  • Clamp the chain and press in the axle. If the bike chain has a lock, we do without squeezing.

After the installation is completed, it is necessary to check the course of the chain: turn the pedals several times. If no sagging or obstruction is observed during torsion, then the chain is of the optimal length and is installed correctly.

Every owner of a two-wheeled horse will be able to cope with the removal and installation of a bicycle chain. An uncomplicated and simple procedure will not take much time, but it will perfectly help on further trips!

How to remove a star from a bike

In order for the bike to be in good condition for a long time, it is necessary to carry out an inspection from time to time. First of all, the chain comes into a worn out state, and behind it the stars on the wheels are the main components in the gearshift system. These parts can be removed and replaced by yourself by purchasing the corresponding parts in advance. How to remove a sprocket from a bicycle and replace it with a new one, consider below.

What tool is needed

Shabby sprockets are subject to mandatory replacement, as they take the bike out of service. In order to remove them correctly, it is necessary to supply tools with which replacement can be carried out easily without damaging the parts. The stars are divided into two categories according to the level of action in the transmission:

  • the system of leading stars (from one to three). located at the crankset with pedals, on the right side;
  • driven. located on the rear wheel, they are in the form of a ratchet or cassette.

Depending on which category of elements on the bike fail, the necessary tools are selected to remove them. Bike Lead System Tools Required:

  • puller for connecting rods;
  • technical grease and napkins;
  • keys. cap and open;
  • hexagons;
  • purchased replacement parts.

With frequent off-road cycling, the smallest one breaks in the leading stars. And at average speeds, on roads with not the best asphalt surface, the average one fails. If the bike is used for racing at speeds, then the breakdown will be big.

Driven elements fail more often, this is facilitated by switching the most popular gears while driving. The tools you need to remove the sprockets on the rear wheel of your bike are:

  • cassette remover;
  • adjustable wrenches;
  • open-end wrenches for removing the wheel for repair work;
  • whip. a retainer with a chain;

The ratchet drivetrain is commonly found on budget 5-8 speed bikes. And the cassette is a modern and modernized solution, which currently includes up to 12 constituent elements.

Sequencing

Consistency in actions is an important point.

System manipulation

Replace the failed stars on the leading system as follows:

  • The axle bolt is removed from the connecting rod on the right side, using a hexagon, and the pedal is unscrewed with an open-end wrench;
  • Install the puller in the connecting rod, clearly along the thread. Then the spanner wrench is placed on the puller and screwed in until it stops. the connecting rod must come out of the carriage shaft;
  • Next, remove the drive system from the bike, memorizing the sequence of actions. The large star, as a rule, remains on the connecting rod, while the middle and small ones are fixed to each other by a “spider”.

Then new elements are placed instead of worn out ones:

  • install new sprockets (if it is small or medium) on the “spider” mount;
  • replacing the large one is carried out together with the right connecting rod, followed by screwing the remaining stars to it. Depending on the standard of attachment, the large chainring can also be removable and does not require replacement of the connecting rods;
  • the assembled structure is installed in a carriage pre-treated with grease and a chain is put on;
  • the connecting rod is scrolled, using a puller, in the opposite direction;
  • all bolts and nuts, plugs that had to be removed earlier, are screwed in strictly in the same sequence;
  • put the right pedal in place and check the movement of the bike elements.

Cassette manipulation

The rear wheel drivetrain is more complex and consists of many components. When the ratchet becomes unusable, it remains only to remove it with a puller and an adjustable wrench, and replace it with a new one, since it is monolithic and does not consist of individual stars. But the cassette is just to be repaired. To do this, take the following steps:

  • The wheel is removed from the bicycle using an open-end wrench. If the mount is eccentric, then it is much easier to remove the wheel by opening the retaining lever;
  • With an adjustable wrench, unscrew the axle nuts (using another nut for convenience) and remove the axle;
  • Install the puller with slots in the grooves of the retaining ring;
  • The whip is placed on a star (preferably a large one) and held;
  • The puller is turned counterclockwise with an adjustable wrench, and the whip is directed in the opposite direction so that the cassette does not scroll. Sometimes you have to make a lot of effort;
  • The retaining ring is unscrewed and the entire cassette is removed. They select the worn-out stars in the mechanism and remove them, replace them with new ones. It is important not to confuse the sequence of disassembling and assembling the cassette parts and the bike mounts;
  • After it was possible to remove the parts, you should clean the cassette from dirt, replace the worn out elements and lubricate the mechanism.

Installation on a bike:

  • it is advisable to apply lubricant to the thread of the retaining ring at the beginning of the assembly. then at the next MOT of the bike the mechanisms will be removed more easily;
  • the stars should be assembled in the same sequence, alternating with spacer rings;
  • put on, twist and tighten the locking ring clockwise;
  • fasten the axle with nuts from the side of the cassette, tighten the chain and put the rear wheel in place.

Check the idling operation of the transmission.

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How to do without a special puller

In order for the equipment to serve as long as possible, it is recommended to remove and replace the worn out parts of the bicycle with a special tool. But there is an option how to remove the elements of the driven part of the ratchet without a special puller:

  • Prepare tools that are in any garage or pantry: center punch, hammer and gas wrench;
  • The punch is inserted into the two existing recesses in the ratchet and gently hit with a hammer, clockwise. The impact force must be calculated accurately so as not to damage the bearings below;
  • The ratchet is removed with a gas key, replaced with a new one. The new transmission is secured back to the bike.

Replacing a cassette on a bicycle without using a puller is not recommended, since it will not be possible to carry out this manipulation without damaging the transmission. The bike will have to be returned to the workshop for repair.

What difficulties can there be

If the bike has not undergone maintenance before and the transmission has to be removed for the first time, then some difficulties are possible:

  • The mechanism twists heavily, it is impossible to disassemble it, and to remove it even with great efforts. We will correct this moment. You can stock up in advance with a special aerosol. a WD-40 spray. It is designed to facilitate repair work with a bicycle and car. It is necessary to treat the desired mechanism with an aerosol and wait for the specified time, after which it will be much easier to unscrew and remove the parts;
  • Inattentive disassembly of the cassette. parts and fasteners are mixed up. In order to avoid this, it is advisable to replace parts carefully, remembering the entire sequence of subsequent steps, possibly with a record, or use the instructions attached to the new bike part.

You can remove and replace worn-out sprockets on your bike yourself, it’s not difficult at all. Professionals recommend conducting a technical analysis of the bike’s transmission at least once every 2 years, for early identification of problems. Thanks to this, the cyclist will be spared from bitter surprises on the road, on trips, and the mechanism itself and the bike will serve for many years.

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How to remove cranks from a bike without a puller? Helpful hints

The transmission of a bicycle tends to wear out even with proper and timely care. Most people, of course, do not have special bicycle tools, and if you suddenly felt an urgent need to replace its components, then most likely you wondered. how to remove the connecting rods from the bike without a puller and is it possible to do it yourself? To deal with this, it is worth learning more about the connecting rods themselves and the types of carriages.

A little about standards

On bicycles of different classes, it is logical to install bicycle cranks and carriages of different standards. The following types of carriage assembly are currently popular:

  • Standard square mount. the old look for budget bikes.
  • Octalink, invented by Shimano. It has several subspecies, including standards from other manufacturers that are very similar in design. In fact, it is a kind of “square” carriages, but has a redesigned shaft and modified splines.
  • Hallowtech II is considered the best option in terms of stiffness / weight ratio, but it costs more than others. Also invented by Shimano.

On older bicycles, wedges were a common mount. There were quite a few problems with such a system, which is why it remained in the last century. Now they are practically not produced, and even the most budgetary bicycles are equipped with square-shaft carriages.

What are the pullers

A bicycle crank wrench is a special tool (usually a press) that makes it much easier to remove the system, unlike a hammer.

remove, system, bicycle

Each of the above standard has its own puller. In the case of a square shaft and Octalink, this is a kind of press, which is screwed into the head of the connecting rod itself, rests on a special platform against the carriage shaft and, by screwing in the nut, breaks the connecting rod. There are cases of breakage of the threads of the connecting rods themselves, if the system was pressed very hard.

The left end cap with Hollowtech II requires a special sprocket wrench. The clamping bolt is tightened with a force of only 1-2 N / m, so the key of this standard is usually plastic, inconvenient, and the cover can be easily unscrewed by hand.

A special tool is good and is worth buying for every bike lover. But still, let’s move on to the main question. how to remove the bicycle cranks without a puller?

Tool-free repair is possible

Ordinary users are unlikely to have a connecting rod puller somewhere, especially for the Octalink, although it costs a penny. But sooner or later a time will come when either the system or the carriage will become unusable and require urgent replacement. If you have the necessary tools, these parts can be replaced in 10-15 minutes.

The easiest way to remove cranks from a bike without a puller, as mentioned above, is with a hammer. It is relevant for both Octalink and a regular square. The subsequent actions look like this:

  • Remove the plugs from the connecting rods, if present.
  • Using a 13 mm wrench, unscrew the carriage bolts. Many carriages today have 6mm hex bolts.
  • If you don’t want to visually damage your bike cranks, wrap them in several layers of thick fabric, cardboard, tape, or take a pine block a few centimeters thick. Ideally, a mallet is suitable for such an unusual task.
  • Flip the bike over against the handlebars and saddle.
  • Begin tapping the connecting rod with moderate force from the inside, as close to the axle as possible. You can hit the connecting rod from the outside from time to time in order to somehow stir it up.
  • If the structure is pressed very tightly, you can try to hit pointwise using a chisel or a barb attached to the connecting rod head.

Please note: Using this method, you can damage the frame, bottom bracket assembly, or the connecting rod itself. In addition, any impact on the stars is likely to deform them and render them unusable.

It is worth saying that removing stuck connecting rods can be problematic, even with a puller. Most likely, in this way you will not be able to remove the stuck bicycle crank, no matter how hard you try. But do not despair, for such cases they came up with other ways.

If there’s nowhere to rush

Let’s say you bought new cranks and want to replace them, but the old ones can still last a few days. In this case, you can try the following method:

  • Unscrew the carriage fixing bolts.
  • Spray any penetrating grease into the contact area.
  • Go for a bike ride without screwing in the bolts.

There is a chance that frequent vibrations will cause the connecting rods to come off the shaft. Be careful, if they fly off during the jump, it will be extremely unpleasant.

The Hollowtech II standard is the least problematic. In order to remove the connecting rods, you only need a 5 mm hexagon, a special wrench for this standard, which can easily be replaced with a 10-11 mm hexagon, and a little effort if the system is stuck to the bearings. Even a child can cope with this.

Radical approach

If the parts are not stuck, the previous methods will help you remove bicycle crank arms without a puller. As you can see, the options are quite elegant and, with the right approach, will not harm either the bike or you. But it also happens that spare parts stick very strongly. Especially often at the points of contact aluminum / steel or steel / steel.

In this case, a grinder or a drill will help. It is difficult to name a specific method of cutting, since the design of frames and systems can be very diverse. On some bicycles, you can simply cut off the crank shaft, on some you can try to drill the largest hole in the place of the thread, which, under the influence of vibrations, will help to destroy the connection or break the metal.

A bonded joint can be destroyed by temperature extremes. Heat the connecting rod head with a burner, for example, and then cool it down as hard as possible. Due to the physical properties of metal, there is a chance to remove bicycle cranks without a puller as soon as the structure cools down.

You can experiment by combining the above methods, or try your own unique.

Preventing corrosion

Those who have dealt with stuck parts, probably, would not want to repeat this again. To prevent such unpleasant situations, you just need to process the attachment point before installation.

When replacing connecting rods, apply a small amount of grease to the bottom bracket shaft where it contacts other parts, regardless of the type. Do not add too much lubricant, because at the time of pressing, its excess will be squeezed out of the connection and will remain to collect dirt outside of it. Before installation, it is also worth lubricating the threads and even some latches.

How to remove connecting rods from a bicycle without a puller. Puller application

A special device that is designed to dismantle hard-to-remove parts is called a puller. This is a no brainer. In our case, to remove the connecting rod from the bicycle carriage shaft. It looks like this.

This type of connecting rod puller provides the ability to remove the pedal as well.

The connecting rod is held on to the shaft by a heavy-duty 8mm head bolt. It is not difficult to unscrew the bolt. But the difficulty is that the connecting rod sits on the shaft with a slight interference fit and has a tapered fit. Very often, in wet weather, water and dirt penetrate into the interface between the connecting rod and the shaft. Then it sticks to the shaft and it is almost impossible to remove the connecting rod. But in our toolbox, of course, there is a puller for connecting rods, which is a complex turning part. a screw with a two-level head for an open-end wrench and a socket. A cunning nut with external and internal threads is screwed onto the screw. It takes a long time to explain, but in the photo everything is very clear.

We remove the connecting rod without a puller

To remove the bicycle connecting rods without a puller, we recommend unscrewing the bolts that tighten the arm with the carriage and drive a short distance without parts. This allows you to easily detach the connecting rod. Tap it with a blunt object such as a wooden one. There is one more method. The part of the connection of the part with the carriage must be heated with hot water. This will help to soak off dirt and dust and the structure will be removed more easily. Burners must not be used as the part will be damaged. There is a trick when removing the pedals. First unscrew the pedals, and then the connecting rod.

Removing cranks from a bicycle with or without a puller is a matter of the situation and your choice. Whatever one may say, it will be more efficient and more comfortable to work with the tool. Use our recommendations, as this will help you easily remove the crank from your bike. both with a puller and, in emergency situations, without one.

At first glance, the design of the pedal looks simple, but in order to dismantle it, you need to have certain knowledge and a set of tools.

Removing the pedals may be necessary for various reasons: before transporting the bike, for regular preventive checks, or after you have taken it. before the season starts. There are situations when a part crunches or emits other atypical sounds, in which case it must either be cleaned or completely dismantled, replaced with a new one. Pedal assemblies of new vehicles often need additional adjustments for a specific person. Therefore, many people have a question about how to unscrew the pedals on a bicycle.

Before removing the pedals, first you need to familiarize yourself with the structure of this unit. These steps must be performed before any such operations. The pedal consists of several elements, and each model can have a different design, namely:

  • the axle is a special metal pin that is screwed into the connecting rod. She is the base for the rest of the details;
  • platform. a flat surface in direct contact with the sole and located at the end of the axis;
  • bearings. the elements necessary to connect the previous parts into a single mechanism, it is they that allow the platforms to rotate;
  • accessories. a variety of bolts and nuts that hold all the components of the pedal together. When disassembling, the fasteners are unscrewed with special tools.

Depending on the platform, the pedals are divided into two groups: contact, in which it is assumed that there is a special mount for cycling shoes, and standard models.

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Removing simple devices does not require much effort. and contact mechanisms with more complex latches are not so easy to dismantle.

How to disassemble a connecting rod without a puller?

The simplest method is to use a special puller. If there is no such tool, then in order to disassemble, remove and make repairs, it is necessary to exert some effort and skill. During the ride, dirt and dust gets into the attachment area of ​​this element, the element literally sticks to its attachment due to heavy loads. In this case, you need to know how to remove the cranks from the bike without using a puller. You can fix the problem and make repairs on your own, and this will help you get to the place of equipment repair.

In unsuitable conditions, you can try the following methods in order to remove the part. If you unscrew the nut or bolt that secures the connecting rod and drive a certain distance, then the element can be disassembled and removed much easier, and in the future, replace or adjust what is required. The method is to pour boiling water over it. Consequently, all dirt and dust will get wet and when making repairs to the bike, it will be easier to remove the element.

This option is also suitable when it is important to remove the pedals. It is important to know and not to be confused in which direction which pedal is unscrewed

The left pedal has a left-hand thread, and the right one, respectively.

If the bottom bracket of the bike requires adjustment, the cranks must also be removed from the bike. Other recommendations will also help with unforeseen breakdowns. If the cable of the gearshift or brake is damaged, you need to replace it with a new one, and if there is none, then tie the broken ends. Bicycle spoke failure is also a common problem. Then a wire with a diameter of about 2 mm will help. The end of the spoke next to the rim is crocheted, and then a piece of wire is inserted, which must be passed through the socket of the hub. This replacement is far from perfect, but it will allow you to reach the goal and a place where you can repair the equipment well. Regular viewing and maintenance of two-wheeled vehicles will avoid many of these problems and make the trip enjoyable.

In what situations it may be necessary to remove the connecting rod?

The connecting rod is a fairly simple part that does not need much maintenance and care. Component replacement is most often done due to mechanical damage. The need for removal may also arise when it is necessary to gain free access to the carriage, perform adjustments or flush the system.

Often, after driving in rainy weather, unpleasant squeaks occur in the carriage area, the cause of which is the ingress of sand and dirt into the nodal mechanism. In this case, it may be necessary to remove the connecting rod to clean the seat.

In general, the connecting rod itself is not dismantled. To do this, resort to the operation of a special puller or the use of improvised methods, which will be discussed further.

Tool-free repair is possible

Ordinary users are unlikely to have a connecting rod puller somewhere, especially for the Octalink, although it costs a penny. But sooner or later a time will come when either the system or the carriage will become unusable and require urgent replacement. If you have the necessary tools, these parts can be replaced in 10-15 minutes.

The easiest way to remove cranks from a bike without a puller, as mentioned above, is with a hammer. It is relevant for both Octalink and a regular square. The subsequent actions look like this:

  • Remove the plugs from the connecting rods, if present.
  • Using a 13 mm wrench, unscrew the carriage bolts. Many carriages today have 6mm hex bolts.
  • If you don’t want to visually damage your bike cranks, wrap them in several layers of thick fabric, cardboard, tape, or take a pine block a few centimeters thick. Ideally, a mallet is suitable for such an unusual task.
  • Flip the bike over against the handlebars and saddle.
  • Begin tapping the connecting rod with moderate force from the inside, as close to the axle as possible. You can hit the connecting rod from the outside from time to time in order to somehow stir it up.
  • If the structure is pressed very tightly, you can try to hit pointwise using a chisel or a barb attached to the connecting rod head.

Please note: Using this method, you can damage the frame, bottom bracket assembly, or the connecting rod itself. In addition, any impact on the stars is likely to deform them and render them unusable.

It is worth saying that removing stuck connecting rods can be problematic, even with a puller. Most likely, in this way you will not be able to remove the stuck bicycle crank, no matter how hard you try. But do not despair, for such cases they came up with other ways.

When to remove the connecting rod

Usually the connecting rod does not need any special maintenance or service. This part can be replaced in three cases:

  • Since inexpensive bike models are equipped with a one-piece connecting rod block with sprockets, the design is completely replaced. Both new sprockets and two connecting rods are installed as a whole. Considering that a non-separable assembly is considered a very inconvenient and impractical option, it is advisable to replace it with a design with a detachable connecting rod and stars.
  • Subject to mechanical damage. The indispensability to remove the connecting rod is due to the need to get to the carriage part, which sometimes requires disassembly, lubrication, washing, adjusting settings.
  • When an unpleasant squeak occurs, which usually appears after rainy weather. As a result, sand gets into the connecting mechanism. Then the connecting rod is disassembled, and the seat is cleaned.

Dismantling procedure

  • We unscrew the cap. For this purpose, you can use an ordinary screwdriver.
  • We unscrew the bolt / nut, with which the connecting rod is attracted to the carriage, remove the washer. This can be done with a spanner wrench or a hexagon by 8 (if a square connection), or by 10 (if a spline connection).
  • Using a puller, completely unscrew the inner screw. We screw it into the connecting rod. We screw it all the way to the stop, so as not to rip or damage the thread.
  • We tighten the internal screw of the puller with a wrench. With it, you tighten the screw clockwise and notice how the connecting rod has moved from the point.
  • We unscrew the tool. It is necessary to be zealous enough to avoid breaking the thread, which will complicate dismantling. In such cases, lubricate the joint or spray with WD-40 aerosol. The aerosol perfectly dissolves dirt residues and facilitates the process, after which you can try again. Instead of WD-40, you can use BSK brake fluid.

Dismantling technology

Before starting the process, sprinkle the mating point of the connecting rod and shaft with a magic solution of WD-40. It will dissolve the remaining dirt and make the process easier. You can just as well use BSK brake fluid if it is lying around in your garage. You can do the same if the bolt does not unscrew

Important! Make sure that the puller rod is less than the diameter of the square on which the connecting rod is fitted. Otherwise, the operation will fail. the thread will break. Unscrew the mounting bolt. We screw the puller into the connecting rod to the limit, making sure that the puller rod is unscrewed as much as possible. We tighten the puller bolt smoothly and without jerking, otherwise there is a risk of damaging the thread.

Here is a step-by-step photo guide explaining the process visually.

Step-by-step instructions on how to remove a pedal from a bicycle without a puller

After finishing the preparatory work, we proceed to dismantling:

  • First of all, slide the system towards the steering wheel, this position is considered to be working.
  • Carefully unscrew the pedals from the crank arm using an adjustable wrench. Which way to unscrew the pedals on the bike? Right. counterclockwise, left. in the direction.
  • Remove the end cap to expose the locknut. Use a small flat-blade screwdriver to do this.
  • Unscrew the nut smoothly, holding the axle with the second key.
  • There is also a washer at the end, which must be removed.
  • At this point, unscrew the cone.
  • It remains to remove the platform from the axle, try to control the position of the bearings in order to exclude their sudden fall.

Note! Each pedal has a unique thread. The axis of the right pedal is unscrewed counterclockwise, and the left one. vice versa

Difficulties during dismantling arise due to external factors or under heavy loads. There are two options for solving such problems:

  • treat the elements with kerosene or solvent. After soaking in such liquids, dirt that hinders rotation can be easily removed;
  • you can heat the axle and connecting rod, there will be a slight deformation of the metal, and the axle can be easily removed along the thread.

Important! In order to avoid damage to the thread, manipulations with the axis are carried out extremely carefully, otherwise the next dismantling will be difficult. In general, the process of removing the pedals is quite simple, it is much more important to prepare the necessary tools and materials, as well as follow the instructions

It is recommended to return the parts to their place first by hand, and only at the end to tighten with special keys

In general, the process of removing the pedals is quite simple, it is much more important to prepare the necessary tools and materials, and also follow the instructions. It is recommended to return the parts to their place first by hand, and only at the end to tighten with special keys.

Sequencing

To remove the connecting rods from the bike shaft without damage, you should strictly follow the sequence of actions used in the professional repair of bicycle equipment. There are many connecting rod mounting systems and they are different from each other. We will look at a popular system in budget bicycles. “squared”:

remove plastic caps if the bike is equipped with them; fill the joint of the crank and shaft with WD-40 liquid to completely dissolve the dirt and facilitate the dismantling process. If not, you can use brake fluid or engine oil to remove the lever as easily as possible;

fix the bike. Check the conformity of the dimensions of the square shaft at the attachment point of the connecting rod and the puller rod. The latter should be smaller, otherwise it will be impossible to dismantle the lever. the thread will break; unscrew and remove the bolt holding the lever on the shaft; place the tool in the lever and tighten it to the limit. The threads must be thoroughly cleaned before this. In this case, the puller rod must be turned out to the maximum level; forcefully push both connecting rods off the shaft, completing the dismantling process

Special care should be taken in this case, since excessive force is unlikely to help dismantle the cranks, but it is highly likely to break the thread.

Dismantling of bike bike assemblies should be continued by cleaning and abundant lubrication of all working components, which should help in future repairs and save the bike from unnecessary wear and tear, as well as from extraneous squeaks and noise when walking.

How to remove a sprocket cassette WITHOUT a puller?

The second option for replacing the proprietary cassette retainer is to take the old chain. Almost any self-respecting cyclist has one or two old chains, especially if they rotate the chains and replace them in a timely manner. If the chain is not changed in time, then you can easily get up to 250 :). So, we take the chain, put it on one end of the cassette, and wrap the other end around the tire wheel, fix it there and turn the nut with a puller. As a result, the chain thrown over the tire pushed the tire to the rim and crumpled the last.

DIY cassette remover kit

The third option came by itself, when I studied in detail the device of the retainer. We again need an old chain, a stick, 4 screws and a screwdriver. It is better not to use nails. they are ripped out of the stick with a bang.

Self-assembled homemade puller

Putting it all together like a photo of a Shimano professional cassette remover.

Installing the connecting rod

After dismantling the part and performing all the planned manipulations, it is necessary to return the structural element to its original place. Before carrying out work, it is advisable to clean all surfaces and joints, and then process them with a thick lubricant. This approach will allow the connecting rod to be installed evenly and will greatly facilitate the work if it is necessary to dismantle it again.

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During installation, the part must be deeply fitted onto the shaft. This will avoid the appearance of backlash during movement. If the connecting rod is not firmly fixed, the socket will gradually become unusable. For reliable fastening of the part, a force of about 50-70 Nm is sufficient.

Bicycle connecting rods: general information

The bike drivetrain has a pair of cranks located on either side of the bottom bracket. Parts are mounted on the carriage shaft using special fasteners. Depending on the manufacturer and type of bike, the mountings differ, and we’ll definitely talk about this a little later.

The connecting rod pair together with the chainrings forms a system. It can be collapsible and non-collapsible. The first type is found on budget bikes, including single speed road bikes. Here, the wear of the sprockets develops simultaneously with the fatigue of the lever material. In case of premature failure of the connecting rods, the system must be completely replaced.

According to the standard, the stars are located on the right in the direction of travel, therefore, the right connecting rod is attached to the sprockets. On mid to high end bikes, the sprockets can be changed separately from the crankset. It can be removed and thus only part of the system can be replaced. worn stars.

Split Mountain Bike System

The connecting rod and the bottom bracket are the most loaded parts of the bicycle transmission, as they directly receive the push-rotational forces from the cyclist’s legs. Materials used in the manufacture of parts:

  • hardened steel;
  • aluminum;
  • titanium;
  • carbon fiber (professional road bike).

The weight and shape of the connecting rods play a significant role in driving dynamics. Manufacturers are trying to make them as lightweight and compact as possible. So, to reduce weight, cavities are specially made inside the part. The idea belongs to the Japanese manufacturer Shimano:

Internal cavities using Hollowtech technology

It will not work to disassemble the system with an ordinary wrench; this will require a special connecting rod puller. When the tool is pressed in, the part freely unscrews from the carriage axis without damaging it.

Video instruction: How to remove a cassette of stars

In this video, literally in 13.5 minutes, I will show all the subtleties, how you can unscrew the rear sprocket, and how to make a special puller yourself to hold the cassette.

How to remove the cassette sprockets of the rear wheel of a bicycle. DIY cassette remover.

Watch this video on YouTube

What information can you find in this video (timestamps):

Technical questions and answers

00:30 What holds the sprocket cassette on the rear wheel of the bike

00:50 Special puller for the rear wheel sprocket cassette nut (175 rubles)

01:15 Why not buy the cheapest cassette remover

01:30 Why can’t you unscrew the cassette “just like that”

02:20 How to keep the rear wheel sprocket when unscrewing

02:30 trying to hold the wheel cassette with a rag

03:25 we hold the wheel sprockets with the old chain

04:00 How to “screw up” a bicycle tire and rim when unscrewing the cassette

04:50 hold the rear sprockets with a special whip when unscrewing

05:10 Making a whip to hold the cassette with our own hands from scrap materials

06:40 Tips for making a whip for removing stars

08:10 Unscrew the rear wheel cassette nut using a puller and a whip

09:40 Remove the sprocket cassette from the ratchet

10:15 How to put the sprocket cassette on the rear wheel ratchet correctly

11:35 How to tighten the nut to hold the cassette in the rear wheel

12:20 IMPORTANT! How to TIGHTEN the rear wheel ratchet cassette so nothing breaks

Required set of tools and materials

Before you figure out how to remove the pedals from the bike, you need to collect all the available tools that will be needed during these work.

Interesting! These tools should always be at hand by the cyclist so that he can make repairs on his own. It is worth purchasing them at the stage of choosing a bike for or.

List of materials that you may need:

In addition to the above things, for removing the pedals are useful:

  • lubricating fluid. all dismantled parts must be cleaned and lubricated to improve performance and extend the service life (you can use the same agent as for);
  • rags. used to cleanse all elements;
  • thinner. used for large, dirty areas or problems with loosening elements. Its analogue is kerosene.

A special stand that fixes the vehicle in the air will help to facilitate the process of removing the bike pedals. However, some cyclists argue that this way they have to put in more physical effort.

Bicycle crank puller

Connecting rod puller (system puller). a tool that allows you to remove the system from the non-integrated carriage shaft. Usually combines two functions: a hexagon for disassembling pedals-treadmills and the actual puller.

The connecting rods are held on the carriage shaft by a bolt for an internal hexagon 8 mm But it is not enough to unscrew the bolt, since the connecting rod sits with an interference fit on the carriage shaft and sometimes “sticks”, so a special puller is required. It is a screw with a two-piece head (socket wrench and open-end wrench), onto which a special shaped nut with an internal and external thread is screwed. Often an adapter is included with the puller for use with slotted standard carriages

Why you need to remove the connecting rods

Modern manufacturers prefer to use aluminum, titanium, steel or carbon alloys for the manufacture of various designs of connecting rods.

But even with increased strength, they must be dismantled in various situations:

  • as a result of infrequent breakdowns;
  • if the bike is equipped with a non-separable design connecting rod. star. This option is the least practical, since when replacing the star, you will also have to remove and replace both cranks;
  • when dismantling and repairing the carriage;
  • if sand gets into the junction of the connecting rod with the shaft. Experts recommend completely cleaning the bike from dirt, for which it is necessary to completely remove the cranks, thoroughly clean and lubricate them.

Dismantling without puller

In this case, scientific and technological progress offers few options.

As you can see, we cannot get away from advanced technologies and progressive methods. Even in such a seemingly trifling matter.

Bicycle carriage repair (maintenance)

You will need a tool to remove the carriage

A bicycle, like any other type of movement, requires maintenance, which can be performed both in specialized workshops and at home using a special tool. Today we will talk about the repair (maintenance) of the carriage, which includes disassembly, lubrication, installation and adjustment of the bike carriage.

As discussed in the previous article, a bicycle bottom bracket is a bearing assembly that connects the crankset to the frame and provides a torque function to the bike crankset. The carriage is located in the bottom bracket of the frame, which is located between the down tube and at the intersection of the chain stays. Because the bottom bracket is located at the very bottom of the bike and when the bike is in use throughout all seasons of the year, it is often exposed to external influences, i.e. saws, dirt, moisture, etc. Over time, in the area of ​​the bottom bracket “crunching” may occur, backlash, clicking and the carriage begins to go out of its usual work. the smoothness and accuracy of work decreases, sometimes even jamming may occur. All of this can be corrected with carriage maintenance.

Closed-type carriages (cartridge) cannot be repaired, therefore, if problems arise with this type of carriage, it simply changes to a new one. But the carriages of an open type (collapsible) lend themselves to maintenance, since they are a shaft (axle) that rotates with the help of bearings that are installed in the carriage cups and screw directly into the carriage cup of the bicycle frame. Therefore, they can be easily removed, lubricated, replaced bearings and reassembled, or simply replace the old carriage with a new one.

Carriage repairs may include:

  • scheduled carriage maintenance (lubrication and bulkhead);
  • elimination of backlash of the carriage;
  • tight rotation of the carriage axis;
  • extraneous sounds in the area of ​​the carriage assembly.

Removing the carriage from the bike and maintaining it

In this article, we will cover the maintenance of Shimano open bottom bogies. The carriage can be with loose bearings, so be careful when removing, as the balls can scatter in different directions, and also in the form of a non-separable cartridge.

Connecting rod fixing nut.

After removing the fixing bolts, using the squeezing of the connecting rods, we screw the puller with the threaded part into the connecting rod until it stops, but here you need to tighten it progressively and without much effort so as not to break the thread. We remove the connecting rod from the carriage axis and wipe the seats. After removing the connecting rods from the carriage shaft, you need to remove the carriage itself, for this you need a shimano carriage puller.

If you have a different carriage type, you will need other carriage pullers. Besides the puller for shiamno, there is also a puller for integrated carriage cups and is suitable for HOLLOWTECH II, GXP, Howitzer. Another ISIS Bottom Bracket Puller with 8 Spline Puller Mount and is suitable for Shimano, Truvativ and SRAM. All types of pullers can also be equipped with handles, and you do not need an adjustable wrench.

When unscrewing the carriage, it must be remembered that the carriage must be removed from the left side, that is, from the side where there are no stars on the connecting rod. We take a puller, insert it into the carriage slots on the left side and turn it counterclockwise with an adjustable wrench. It is very important to avoid any distortions of the stripper when unscrewing the carriage cups, so as not to damage the cup itself and the stripper.

Shimano bottom bracket puller.

After the carriage has been removed, it is necessary to check the carriage cup for dirt, sand and other things that could get there, both through the carriage and the seat tube of the bike.

Howitzer Carriage Puller.

ISIS carriage puller.

If you have an integrated carriage, then you can change the bearings by replacing the seals. To check the condition of the industrial bearings, remove the boot and see the old bearings. They can be removed with a special puller for internal bearings or disposed of with a hammer and chisel (not recommended). We clean and lubricate the seat, after which we put new industrial bearings.

Before installing the carriage, wipe and lubricate all threaded connections.

Bicycle bottom bracket installation

When assembling the carriage, the main thing is to place the cups correctly. Let me remind you that they have different threads, namely. the right cup has a left thread, and the left one has a right thread. Before installing the carriage, grease the carriage cup, bearings and cup threads with grease. The assembly of the carriage must be started from the right side. To begin with, insert the carriage axis into the right cup and twist it with a carriage puller, and then the left one until it stops. After the carriage cups have been screwed in, it is necessary to check the carriage for any backlash (the carriage should rotate easily and silently). To do this, we twist the carriage axis in different directions. Be careful and make sure that the cup runs smoothly along the thread, as it is very easy to damage it. We put in place the connecting rods and fixing screws.