DIY stels bicycle carriage repair

In detail: do-it-yourself stels bicycle carriage repair from a real master for the site my.housecope.com.

In order to popularize the rides of Velokursk among the fair sex, the authors decided to create a repair artel “for girls - for free”
But after completing the carriage replacement operation, we decided to temporarily suspend accepting new orders.

To add to the excellent report, the physical mass of the mighty grip was a two-to-one ratio to the mass of the bike. The vices weighed about 40 kg and there was also a question, which is easier: to twist a large, loose 20 kg led around them, or a compact, but heavy vice around led

Although initially I did not like any of the options, but this method, proposed by APro, gave an excellent result in the form of the first movement of the cup stuck and rusted in the frame. In the process of unscrewing it, we more than once had a desire to find a grinder and either modify the splines (so that there was something to grab onto), or even cut it carefully to hell. But the grinder was still not there, and what was captured as a couple of photographs of twisting one right cup took about half an hour.

A lot of interesting and funny things remained behind the scenes, and most of the fact that many of the work was done together and there was simply no one to take pictures. For example, how APro and I tried to stretch an elastomeric suspension fork on an atom, which is stuck in a failed position

Having steamed up late into the night with these Auchan bikes, we once again made sure that a cheap bike of this class cannot be bought in any case: not the first, not for children, or any other. The most ashanistic lead (blue, some completely complete noname of a terrible look), we left for later. Every time I looked at him yesterday, I had a nervous smile on my face and a desire to take and throw him entirely with a beautiful sweeping gesture (and weight> 20 kg) from the highest mountain into the deepest abyss, and then for a long time to watch the endless fall there, as he will beat against the rocks and chipping pieces from them fly with them further into the darkness of Hades

Tonight we plan to continue the epic bike hentai - it's generally pessimistic, but very fun.

Video (click to play).

In the evening program:
1. The Scariest Auchan bike
- Threaded steering bulkhead
- bulkhead carriage
- change of the ratchet
- chain change
- change of pedals
- removal of a kilogram footboard
- removal of bolted iron horns

2. Not the worst Auchan bike (red Stealth, the main character of yesterday)
- replacement of the ratchet
- chain replacement
- change of pedals
- replacement of shirts and cables
- customization

3. Not even an Auchan bike (blue Atom)
- bulkhead elastomer plug
- replacement of the ratchet
- replacement of the cassette
- adjustment

PS: to the photos from the APro report, especially where there is steam from boiling water, armature, an ax and other obviously not a bicycle tool - I just want to add a signature below in the style: “All work in this program is performed by professional bicycle mechanics. Don't try this at home! ”

The bottom bracket is a bearing assembly on a bicycle that connects the crankset to the frame. Thanks to the bearings inside the carriage, the system can rotate freely. Through the carriage, the torque from the pedals is transmitted to the bicycle wheel.

The carriage is located in the carriage glass of the frame, where it is either screwed in or pressed in. Because the bottom bracket is located at the very bottom of the bike (between the downtube and the intersection of the bike chainstays), the bottom bracket itself is highly susceptible to dirt.Such a negative external influence over time affects its work: there are "crunching", clicking, backlash, jamming. To prevent these negative consequences and exclude the possibility of failure of the carriage, it is necessary to regularly carry out its maintenance.

closed (cartridges or capsules), in which the bearings and axle are a single non-separable unit (although there are several separable models). Such carriages cannot be repaired or serviced. In case of any problems with operation, the faulty carriage is replaced with a new one. However, it should be noted that closed carriages are less prone to contamination;

open (collapsible) are a shaft rotating in bearings that are in the cups.

The latter, in turn, are screwed directly into the bottom bracket of the bicycle frame. This type of carriage is serviceable and can be easily removed, lubricated, sorted out and reassembled. If necessary, it can also be replaced with a new one.

Maintenance of a bicycle bottom bracket includes disassembly, lubrication, installation and adjustment.

Next, let's take a look at the bottom bracket removal process using the example of a Shimano open bottom bracket.

When removing the carriage, you need to be careful, since it can be with loose bearings, which, when removed, can fly apart in different directions.

To remove the connecting rods from the carriage axle, you need a tool such as a connecting rod squeeze. This tool has two functions: its right side is intended directly for pressing the connecting rod out of the carriage axle, and the connecting rod fixing bolt is removed by means of the left side.

First, using a pedal wrench, unscrew the connecting rod tightening bolts located at the end of the carriage shaft. The plastic plugs (if present) can be easily removed from the bolts using a standard flat-blade screwdriver.

After removing the fixing bolts, proceed to the connecting rods. We take the squeeze of the connecting rods and screw the puller with the threaded part into the connecting rod until it stops. It is very important not to overdo it with pressure, so as not to disrupt the thread. Having successfully removed the connecting rods from the carriage axis, do not forget to wipe the seats.

Then, using a special puller, we remove the carriage itself. In our case, we are using a Shimano bottom bracket remover. A suitable puller is available for each individual carriage model. So, for Hollowtech II, Howitzer, GXP carriages, a puller for integrated carriage cups is used, and for Shimano, SRAM and Truvativ carriages, a so-called ISIS standard carriage puller can be used. It is worth noting that the set of pullers often includes handles, which frees you from the need to additionally use an adjustable wrench.

It is important to know that the carriage is removed only from the side where there are no stars on the connecting rod, that is, on the left.

So, we insert the puller into the carriage slots on the left side and twist it with a handle or an adjustable wrench counterclockwise. In the process, you need to ensure that there are no distortions of the puller. Otherwise, he or the bowl itself may be damaged.

After the carriage bowl is unscrewed, you need to perform the same actions on the right side. Only in this case you need to turn the handle clockwise! As a result of such simple actions, the carriage will be removed and ready for service or replacement.

Want to see how to remove the crankset and bottom bracket? Watch the video review:

After removing the carriage, check the condition of the carriage glass for contamination.

The condition of the bearings in the carriage cup is checked: both the bearings and their seats are wiped with a clean cloth from the remnants of old grease.
The carriage thread is washed with kerosene, gasoline or WD-40 and wiped off with a dry cloth.
The seats are lubricated with a small amount of grease.
Bearings are put in, and a little more grease is added. If necessary, old bearings must be replaced.

It should be noted that carriages of this type are short-lived, so maintenance and adjustment of bearings should be carried out quite often.If problems arise with a carriage of this type, it is replaced. When choosing a new carriage, it is important to know the length and width of the shaft, as well as the type of connection to the connecting rods.An important point when assembling the carriage is that the cups are correctly positioned. It is worth remembering that the left cup has a right-hand thread and the right cup has a left-hand thread.It is worth starting to assemble the carriage from the right side: the carriage axle is installed in the right cup and twisted by the carriage puller until it stops. Then the same is done with the left cup. After that, it is recommended to check the carriage: you need to twist its axis in different directions and make sure there is no backlash (the carriage should turn easily and silently).At the end of the process, the connecting rods are installed in their places and fixed with screws.

For repair and maintenance of the bike at home, we recommend using special stands.
What cycling tools every self-respecting cyclist should have
Does your bike squeak when you pedal? my.housecope.com/wp-content/uploads/ext/3085/skripit-velosiped

Perhaps fans of simple periodic bike rides are not familiar with this term, but those who often use a bicycle as a vehicle, and even more so, professionals in the field of cycling, are aware of what a bottom bracket mechanism is.Like any mechanism, this part over time is exposed to external influences, wears out or completely becomes unusable, which requires maintenance, full or partial replacement. In any case, you first need to remove the carriage, establish the suitability of the part, and then decide whether to repair it or replace it with a new one.The carriage is a unit located in the middle of the frame, placed in a special cavity - a glass. Where to look? It's simple: it is hidden where the cranks with pedals and stars are located. The main function of the bottom bracket is to connect the crankset to the bike frame and provide torque when pedaling.A quite reasonable question may arise: what, without this device, you can not do at all? There is no bicycle without a carriage. If one is still caught, it means that he is not in use now.Depending on the bike model, carriages differ in size and maintainability. The most common are 68mm knots, but other diameters can also be found. Carriage shaft length range: 110mm, 113mm and 122.5mm.

cartridge (disposable);

collapsible to be repaired.

The first type includes carriages that are installed in the frame and cannot be disassembled. Obviously, the service life of such a mechanism is equal to the time of complete wear of the bearings or axle. Full sealing of the unit allows it to be operated for a long time even in extreme conditions, not to mention measured driving.Collapsible mechanisms will require periodic inspection and maintenance from the owner. The latter consists in replacing worn bearings and lubricating the entire assembly. We will just talk about them further: how to remove the carriage, troubleshoot and reassemble the assembly.The fact that the carriage has become "buggy" can be found only when you rotate the pedals. Visually, knot problems are difficult to identify, so it is best to prick up your ears and move your attention to the area of the bottom of the frame.You should not listen too much, especially if you are driving on a busy road. However, if the state of the carriage is not good, it will “scream” about itself without delay.A faulty bottom bracket will prevent you from cycling quickly. Blocked dirt, worn bearings and lack of lubrication will continually impede movement. All this is accompanied by an unpleasant creak and a characteristic knock from below. Also, the assembly may begin to play (broken bearings and axle misalignment).It is possible to finally check whether it is really worth disassembling the carriage using the "standing ride" method. To do this, you need to accelerate a little, get up from the seat and twist the pedals. When the carriage mechanism is jammed, the sounds and deterioration of the pedal travel will only increase.It makes perfect sense to first remove the assembly from the bike frame to fix the problem. To be precise, take it out of the glass. Just about how to do it with your own hands, and the conversation will go.So, before proceeding with the removal procedure, you will need a set of tools:

Connecting rod squeeze.

Wrench. If the size of the nut is unknown, then an adjustable wrench will go.

Flat screwdriver.

Small hammer.

Carriage puller for removing from the glass.

Before proceeding with disassembly, you should clean all the space around the carriage. A damp cloth removes all dirt and dust from the frame, bottom bracket area and connecting rods. This will be enough so that excess dirt does not get inside during parsing. But it will be better if you wash the whole bike. Cleanliness is the best repair assistant. Proven!Plugs are removed from the connecting rods. Basically, these are plastic covers that can be easily pry off with a screwdriver and can also be easily inserted back. Next, you need to unscrew the nuts securing the connecting rods to the carriage. A squeeze will help in this matter: we put it on a nut, then we take the key and unscrew it. Depending on the type of thread, the direction of loosening and tightening the nuts may vary. There is an option where the thread is right on the left side (counterclockwise - loosening), and on the right side - left (counterclockwise - tightening). Maybe there is only a right-hand thread on both sides, it will not be difficult to figure it out.The next step is to remove the connecting rods. The squeeze is inserted at the other end and twisted into the connecting rod. The squeeze bolt is forcibly screwed into the connecting rod, as a result of which it gradually comes off the axis. It is recommended to start removal from the side where there are no transmission stars.The bicycle carriage is held in place by means of special cups fixed with rings. A screwdriver is attached to the ring so that its end points to the left. By lightly tapping the hammer on the screwdriver, the ring smoothly turns to the left and jumps off. Similarly, by turning to the left, using the percussion method, the cup is also removed.So, finally we got to the bottom bracket bearings. These small parts can be removed with the same screwdriver: pry, and they will pop out.And, finally, a removable device pulls out the carriage shaft from the glass - a rotating part that plays a major role in the mobility of the bicycle cranks.Dismantled the carriage, pulled it out of the frame and what do we see? The state of the bottom bracket depends on how much dirt has got into it and how much the bearings are worn out. Sometimes the bearings simply shatter and require a complete replacement. This often happens if the carriage assembly has been in operation for more than three to five years.First, all parts must be checked for defects. This primarily applies to bearings. Then we inspect the carriages, cups with latches. If any component has visible damage, then you need to change it to a new one. The rest of the parts are cleaned in a solvent. The most difficult thing will be to clean the bearings: the dirt is very firmly adhered between the balls.The space inside the carriage glass is cleaned with a rag. It is better to sprinkle fine dirt with a lubricating spray (WD-40, for example) and wipe the walls with a soft dry cloth.Using a screwdriver, the walls of the glass are processed. Apply the product in an even thin layer. No need to put grease inside the mountain. It's useless. Then grease is applied to the bearing, which is inserted from the side of the stars. The flat bezel should face outward. Then you need to lubricate the carriage shaft and insert it so that the long end is on the transmission side. In general, the carriage assembly is carried out in the reverse order.The bearing on the other side is inserted in reverse, with a frame into the glass. The cups are lubricated from the inside, and then put on. It is necessary to tighten until the axial play is completely eliminated. In this case, the rotation of the shaft should be slightly constrained. As soon as the retaining rings are mounted, the cup will move slightly and the axle will rotate freely.It remains to collect the connecting rods. The most important thing here is to put them on so that when pedaling, God forbid, they do not fall off. Procedure for Efficient Connecting Rod Assembly:

The square is lubricated with a small amount of grease, this will help to push it deeper onto the axle.

Processing a screw with a thread lock.

Tighten the connecting rod nut with maximum effort until it stops. You can even lengthen the wrench - the thread will not break.

Insert plugs.

A bicycle is an extremely unstable unit, therefore, during any repair work, it must be carefully fixed. The frame will not wiggle back and forth, which eliminates the risk of the bike falling to your feet or hands.

Carriage. There are no technical instructions for repairing a bicycle carriage, but it is also changed in workshops when it is worn out or mechanically damaged. It is not necessary for a biker to seek help from a master; it is not difficult in this regard to repair the bicycle carriage with his own hands.

The two types of carriages (cartridge and integrated) consist of two cups. Each has its own bearing. When disassembling and replacing the carriage of a Stealth bike during repair, it is important to remember where both the one and the second carriage cups are located. To understand the mechanism, watch the video on the construction and repair of the bike: rear hub.It is a connected mechanism of plate and cylindrical compression plates. There are at least three rows of bearings, two are installed on the housing, the third on the drum.Once a month, with intensive driving, it is advisable to lubricate the ratchet with a special oil, after removing the old grease with a solvent.Additionally, watch the video "Bicycle Rear Wheel Repair". The front wheel is repaired in much the same way.Repair of the derailleur on a bicycle consists of diagnostics regarding the frame, adjusting the screws, checking and adjusting the cable tension. Additionally, the owner or technician should lubricate the torsion and tension springs of the rollers. Repairing a bicycle's rear derailleur and front wheel mechanism will vary significantly.Additionally, you can watch the video "DIY Stealth Bike Repair" on this topic, where special attention is paid to the repair of the rear derailleur on the bike.The safety of the biker primarily depends on the high-quality operation of the brake system, therefore, its serviceability must be a prerequisite.Conventionally, the brake system is divided into hydraulic line calipers, handles.The caliper (caliper) are brake pads, and an aluminum body with a piston.The number of pistons is usually two, on high-quality sports bikes it is four.Repair of hydraulic brakes on a bicycle is the replacement of worn-out pads, diagnostics of the condition of the piston system, since depressurization of the pistons threatens to brake failure. Image - DIY stels bicycle carriage repair

When checking the bike in motion, several points are established for repairing the brakes on the bike:

If the braking is insufficient, then the handle fails: there can be two reasons:

The pistons are depressurized or the pads are worn out.
In this case, the pads are changed and the brakes are pumped.
Prolonged braking will result in brake fluid boiling and complete brake failure. In this case, let the liquid cool down for a few minutes.
If the handle does not fall but the braking is weak then check the pads. Is there dirt under them?

Video (click to play).

Brake levers. They are represented by a body part, handles and a piston. Your task is to check if the handle is leaking and to check the O-rings for tightness.