How to remove a stuck connecting rod on a bicycle

Removing the connecting rods from the bike without a puller

In cases where the cyclist does not have access to a specialized tool, there are comparatively few options left to accomplish the task. To remove cranks from a bike without a puller, you can use the following solutions:

  • Try to forcefully dismantle the connecting rod. Of course, in the case of using a sledgehammer, there is a high probability of causing irreparable damage to the bearings and carriage. Although the idea may pay off, it may be because of your own laziness that you will have to resort to additional costs for repairing other parts.
  • The second option involves abundant treatment of the joints with lubricants, followed by unscrewing the bolts. With the fasteners released, it is enough to ride a bicycle a few hundred meters, applying maximum pressure on the cranks.
  • The next solution, which will allow you to figure out how to remove the cranks from a bicycle without a puller, involves the use of an angle grinder. Using the tool, a neat cut is made on the sleeve. Next, the part is finally dismantled with a hammer and breakdown. The main disadvantage of this method is the need for the subsequent replacement of the old connecting rod.

The carriage axis has a square section

There are three possible variations:

    The connecting rod is of traditional design. On carriages of this type, the ends of the carriage axis have square sections. The connecting rods together with the boot (plastic ring) are attracted by a screw, which is screwed into the axle. The screw is visible in the middle. The screw has a head for an internal hexagon of 8 mm.

Mainly used in systems on Shimano Acera / Alivio / Deore (up to 2007) and Suntour Duro

  • The screw is covered with a boot. It differs from the previous design only in that the screw attracting the connecting rod is located under a plastic plug. a boot, which must be removed by tipping.
  • The third type of crank is often used on very inexpensive bicycles. Here, the carriage axis also has square sections at the ends. But here the connecting rods are not attracted by the internal screw, but by the bolt. The bolt is usually under the boot. The bolt can be unscrewed with a 14.
  • How to remove cranks from a bike without a puller? Helpful hints

    27 december 2017

    Bicycle transmission tends to wear out even with proper and timely care.

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    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 a bicycle 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.

    Dimensions (edit)

    According to this parameter, spare parts differ exclusively in length, which ranges from 1.5 to 1.85 cm.For any large, installation of absolutely any element in length is suitable.

    Everything depends only on the choice of the owner of the two-wheeled vehicle. The installation of connecting rods on high-speed units assumes short ones, and on mountain bikes they are oblong. Another question. changing only one component.

    In this option, it is imperative to adhere to the parameters.

    A little about standards

    On bicycles of different classes, it is logical to install bicycle cranks and carriages of different standards. At the moment, the following types of carriage assembly are 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 type of fastening. 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 carriages with a square shaft.

    Types of connecting rods and carriages

    The connecting rods have different mounting methods, which depend on the type of carriage used. We examined in detail the types of carriages in this article.

    Connecting rod mounts

    It is important for every cyclist to know about the attachment of the element systems. So, on all components you can find two holes with which the element itself is attached to the carriage axle, as well as the pedals.

    With pedals, everything is very simple. they have a universal thread, but attaching the connecting rods is a more complicated process. They can be connected by wedge, various spline connections, as well as a square connection.

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    Having familiarized yourself with all the characteristics of these spare parts, you can correctly and easily choose the option you need.

    We watch the video how to remove the crankset from the bike:

    Removal technology description

    There are several options for removing the connecting rods. Most often, users work with a puller. it’s easier and faster. If it was not available, you should read the instructions for dismantling without this tool.

    Installing the connecting rod

    After dismantling the part and performing all 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.

    remove, connecting, bicycle

    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.

    Removing the connecting rods from the bike without a puller

    In cases where the cyclist does not have access to a specialized tool, there are comparatively few options left to accomplish the task. To remove cranks from a bike without a puller, you can use the following solutions:

    • Try to forcefully dismantle the connecting rod. Of course, in the case of using a sledgehammer, there is a high probability of causing irreparable damage to the bearings and carriage. Although the idea may pay off, it may be because of your own laziness that you will have to resort to additional costs for repairing other parts.
    • The second option involves abundant treatment of the joints with lubricants, followed by unscrewing the bolts. With the fasteners released, it is enough to ride a bicycle a few hundred meters, applying maximum pressure on the cranks.

    What are connecting rods?

    The connecting rod is a part that carries one of the most significant loads during movement. There are blocks of chainrings that are motionlessly connected to the connecting rod. In this case, if a breakdown occurs, it is necessary to replace both connecting rods. On bikes in the upper price bracket, the stars can be changed by disconnecting from the connecting rod as they wear out.

    Questions about how to remove the cranks from a bike without a puller begin to bother bike owners if these parts are damaged. It is necessary to dismantle the element in order to gain free access to the carriage when adjusting it.

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    Connecting Rod Play

    Manufacturing materials

    During travel, the cranks are subject to the highest load. Therefore, solid steel is most often used as a material for their manufacture. Recently, products made from aluminum alloys have been in high demand. Most often, such solutions are used in the configuration of sports bicycles, where reducing the total weight plays a decisive role.

    With a puller

    The process of dismantling the bicycle connecting rod with your own hands must be carried out in the following order:

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    • Unscrew the boot-cap (sometimes it is enough to pull it out with a screwdriver. there is no thread on it).
    • Unscrew the bolt / nut that secures the element to the carriage and remove the washer, if present. Prepare in advance a box wrench (usually 14) or an 8 hexagon (if a square connection), a 10 hexagon (if a slotted mount).
    • Grasp the bicycle crank puller and turn the inner screw all the way out. If a square fixation is provided, you will need to remove the adapter plate (if it is on the key), if it is slotted, then this adapter plate will be needed. This is important, because often the craftsmen do not remove the adapter and rest against the connecting rod itself, but not against the axle. Pulling on the piece, they rip off the thread.
    • Screw the tool into the connecting rod. It is screwed to the end, otherwise it may break off and break the thread.
    • Tighten the inner screw using a wrench. It turns clockwise. we will notice how the connecting rod gradually moves from a dead center.
    • After such removal, the puller is twisted from the part.

    You should not overdo it, otherwise there is a risk of breaking the thread or spoiling the wrench for removing the connecting rods on bicycles. this will significantly complicate the work. It is recommended to fill the connection with grease and try again.