How To Disassemble Bosch Hammer Rotary Hammer

Is DIY repair real?

Not always, a visual inspection will help to identify the cause of the breakdown. In this case, the next step is to disassemble the punch. If the device has served for many years and is not of significant value, you can try to find the cause of the breakdown by disassembling the tool into separate parts. Feel free to start an offline repair if the cause of the tool malfunction is visible visually and you already have an idea of ​​the perforator stuffing. If the device was purchased relatively recently, and the model itself is more modern and costs a lot of money, then it is best to contact the service center, because an independent repair can not only fix the device, but cause harm. If the inspection of the unit did not reveal a breakdown, then it is necessary to postpone the repair of the hammer drill. In the latter case, it will not be superfluous to consult an experienced specialist.

How to repair a hammer drill with your own hands: disassembly, assembly, video

Any tool, including a hammer drill, requires special personal care and careful use. Therefore, each owner of such an electric tool is obliged to regularly inspect the unit, to know how to disassemble a hammer drill. It is quite possible to disassemble and repair the device at home without spending a penny on the services of a specialist.

disassemble, bosch, hammer, rotary

A hammer drill is an indispensable tool at any construction site, but due to careless use it wears out very quickly and fails. This is due to the high stress on the tool. As we know, the rock drill is often used at full power in the toughest conditions. Due to such loads, even branded models are susceptible to breakdowns. Therefore, each owner of this device should know how to repair a punch with his own hands.

Like any other technical device, a hammer drill can be repaired, for this it does not have to be carried to a specialized workshop. Although not every man knows how to repair a hammer drill, it doesn’t matter! This article will help you do DIY repairs without assistance.

Equipment failure symptoms

Signs:

  • Burning smell from the device.
  • There are pauses or small short circuits during operation.
  • The device does not turn on the first time or works intermittently.
  • The appearance of extraneous noise when working with the device. At the same time, such noises were not noticed before.

Any of the above signs should not be ignored. Begin to investigate the cause of the unit failure. For trouble-free operation for a long time, you should carefully monitor and care for the instrument. To repair the device, you should study the components of the punch and learn how to disassemble and assemble it.

general information

The most common cause of tool breakage is loose wire. Due to simple inattention, people pay significant money for a sheer trifle in puncher repair services. An elementary inspection is enough to understand that the tool has broken conditionally, that it can be easily repaired by yourself without outside help.

Disassembly and assembly of the tool

The damaged wire on the device, like other minor mechanical damage, can be easily noticed. If you make a thorough inspection of the parts of the instrument, it is not difficult to see other minor malfunctions that led to the breakdown of the device. For more serious problems, you need to disassemble the hammer drill. And upon completion of the repair work. also the assembly of the perforator. The second operation in some cases is more difficult than the first. the appearance of unnecessary parts after assembly will indicate repair miscalculations. To prevent this from happening, you need not only to know how to properly repair a hammer drill, but also how to assemble it. It is important to be careful and careful when repairing a tool, then in 99% of cases the repair will be successful.!

To start repairing a perforator, including a barrel type, you must properly disassemble the device:

How to repair 11E Not vibrating change O ring

  • Removing the rubber tip and ring spring. After that, we proceed to remove the drill coupling casing itself.
  • Carefully take out the steel ball, which acts as a fixation.
  • Removing the switch handle, having previously placed the operating mode lever to the maximum position. Press the button to fix the position.
  • Removing the cover (rear) on the handle.
  • Removing the motor brush.
  • Removing the front part, for which you need to unscrew the 4 screws located near the drill.
  • We take out the rotor. To do this, unscrew the crepes located on the stator, then detach 4 terminals from the stator contacts.
  • We take out the remaining parts.

In some cases, if the problem lies in the gearbox or percussion mechanism, we additionally unscrew the end of the gearbox housing, and then carefully remove the casing made of plastic. To keep the parts in place, it is best to do this entire process with the tool on its side.

Self repair

In most cases, repairs involve replacing broken and defective parts. But there are other problems with the instrument:

  • Breakdown of the winding. To solve the problem, rewind the armature and stator.
  • Wear of brushes. In this case, they resort to disassembling the puncher and replacing worn parts.
  • Wear of the anther of the hammer drill. It cannot be repaired, only replaced.
  • Punch chuck. The problem will be noticeable if its rim starts to slow down constantly. To be replaced.
  • Poor lubrication. Check the oil level in the oil pan periodically. Some parts of the tool should also be lubricated: intermediate shaft, gear gear.
  • Bearing wear. The bearings gradually collect dust and dirt during operation, the grease thickens, they begin to overheat and, as a result, fail. Replaceable.

If the breakdown is serious, and you have no experience in repairing, the best option for you is to contact experienced craftsmen. Do not proceed with the repair if you are not sure that you can independently identify the cause of the breakdown and are unable to solve it!

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How to choose?

Getting to know the models isn’t everything. Be sure to study the technical nuances of the perforator, its work, before giving money for it. For beginners, first of all, you should understand: there is a direct relationship between the mass of the device and its power. There are no lightweight models capable of delivering the most powerful blow.

Although there are “middle peasants”, and even very worthy, most likely, the improvement of this characteristic was achieved due to the weakening in some other respect.

Special accessories are a useful addition. If the kit already includes dust-free and vibration-free devices, that’s very good.

As for the electric “heart” of the hammer drill, its horizontal layout is preferable for household machines. All the same, you will not have to punch 3 reinforced concrete walls every day. Therefore, lightness is much more important.

But every professional builder and repairer is advised to choose devices arranged in a vertical pattern.

Indeed, in this case, the maximum power and the ability to drill, chisel without interruption for longer are your own earned money.

Passive vibration protection is a useful addition. Yes, it dampens only a small part of the vibrations, but it additionally reduces the risk of the rock drill slipping out of your hands.

Hammer rotary hammers: features of selection and tips for use

A hammer drill is a very important and relevant tool for home repairs, for performing construction work. But his choice often encounters difficulties. Without figuring out exactly how to use the Hammer hammer drill, what to look for when choosing it. it will not be possible to do the basic work with high quality.

Characteristic

Professional drilling machines of this brand are capable of working in three different modes, such as:

  • clean drilling;
  • drilling with striking;
  • one strike.

The trade line includes both standard and semi-professional products.

The difference between the products of these classes is as follows:

  • the specifics of the placement of the electric motor;
  • dust protection level;
  • the ability to control the twisting speed;
  • the presence of a reverse function.

The PRT 800 model has been given a positive assessment by DIYers. It can work for about 5 years. Importantly, this stability is maintained even with active use by professional repairmen.

The only condition is proper application, that is, mainly for the electrical part of the repair. The device does not always cope with more serious work. If the basic requirement is met, the device is guaranteed to pay off.

But at the same time, it is necessary to remember about two weaknesses: some jobs require more powerful equipment, and in addition, using this hammer drill is not for weak people.

Consumers also approve of the PRT 650 A rotary hammer. Experienced craftsmen claim that the cost of this model is fully justified in practice. It can be safely used to prepare holes in brick, including before installing plasterboard elements. Compared to peers in its class, this rotary hammer is inexpensive.

The following advantages are also noted:

  • the convenience of the case;
  • decent delivery set;
  • the presence of drilling and chiselling modes;
  • acceptable power.

Important! You cannot ignore the fact that the device emits an unpleasant odor during operation.

Amateur builders, repairmen have a good opinion about the PRT 1200 model. For a year or more of operation, it does not cause any complaints. The fact that, due to the weight of the device, you have to hold it with both hands when working is just an inevitable moment.

It should be noted that in the first minutes after starting the device can quickly warm up.

Completing the review is appropriate on the PRT 800 C Premium. Even those craftsmen who use the device very intensively are satisfied. The assembly of the device is consistently positive. The appearance of elevators and knocks is categorically excluded, while delivering powerful blows is ensured.

The only drawback is the fragility of the branded case, which will have to be protected from falls.

How to work properly?

Even the cheapest rock drill must be used wisely. Otherwise, he will not work even half of the due date. The most important rule is correct insertion of the drill or drill. You need to fix and remove these devices only as instructed by the instructions. When planning to use the impact mode, it is required to apply a protective lubricant under the brand of the manufacturer of the drilling machine.

Extremely important! Impact mode is intended for processing stone, brick or concrete, as well as other hard building blocks. Using it when working with wood, steel and non-ferrous metals simply means wasting the resource of the tool.

This will not affect the speed and quality of work. It is also impossible to turn on the shock mode when the working part does not rest against the surface. Air strikes are extremely harmful to technology.

When working with a rock drill, it is always best to use a safety sleeve. It is she who helps to avoid unpleasant consequences both for the equipment and for its owner, if suddenly the drill or drill gets jammed. It is categorically unacceptable to put pressure on the hammer drill as a whole or on its handle. Usually they start working at the lowest speed, only then gradually increase them.

And you should also remember about such rules as:

  • the perforator is cooled only by stopping for a certain time, and nothing else;
  • before starting work, you should check the quality of the insulation of the case and all wires;
  • it is undesirable to drill or hammer in anything without protective glasses and gloves.

How to repair yourself?

Even for professional, careful users, hammer drills sometimes break. But you can do something to correct the situation with your own hands. Without contacting specialized repair centers, it is possible to replace brushes and starters, a bearing and a switch, even a power cable. Home renovation is likely to be done with light hammer drills.

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Serious professional tools do not recommend doing it yourself.

Disassembly of the punch is as follows:

  • the end part, washer, spring and ball are sequentially removed;
  • unlock the case;
  • the ends of the wire feeding the stator are taken away;
  • pull out the brush holder;
  • the gearbox and housing are spread apart so that the switch can be pulled out;
  • holding the body in a vice, take out the necessary parts;
  • they are replaced or cleaned;
  • collect everything in reverse order.

Next, see an overview of the Hammer PRT650A rotary hammer.

Repair of rotary hammers Bosch 2 26

Before you fix something in this model, you need to familiarize yourself with the features of the device, the scheme and the principle of operation. The rotor shaft transmits rotation to the barrel shaft through an intermediate shaft, the bearing of which directs the return movement to the impact piston.

When disassembling the barrel shaft in the impact unit, you need to pay special attention to fixing the spur gear. Before removing it, it is necessary to remove 3 pins on which it is fixed in this model.

Slant Tooth Gears

The reason that the device stopped working normally, namely, stopped drilling and chiseling, may lie in worn teeth on the rotor shaft.

If this happens, the teeth will also be worn out on the intermediate helical gear.

This problem occurs when the tool is jammed or the clutch is not working properly. Breakage is eliminated by replacing the intermediate gear and the engine rotor.

Dismantling the punch and removing the cartridge

To repair a hammer drill, you first need to disassemble it correctly. And we begin to do this by disassembling the cartridge.

  • Remove the rubber tip and retaining ring;
  • Remove the washer and conical spring;
  • We take out the side balls (preferably with a magnet);
  • We put the lever of the operating modes in the position equivalent to the maximum, and remove the switch knob. We fix the position;
  • Remove the rear handle and motor brush;
  • Unscrew 4 screws near the drill to remove the front cover;
  • We take out the barrel and shaft, and with a screwdriver. the bracket and bearing;
  • Open the back cover and take out the reverse switch;
  • We remove the rotor, for which we unscrew the crepes and disconnect the terminals from the starter, which also needs to be removed by removing the protective casing.

Important! When disassembling, be extremely careful about where and when you remove certain parts. Fold them up so as not to lose. It depends on whether you fold the instrument back or not.

Do-it-yourself Bosch hammer drill repair

If any parts in the tool are damaged, broken or poorly performing their function, then they just need to be replaced. If the brushes are worn out, then when disassembled, they are simply replaced with new ones. A hammer drill chuck with a slow rotation of the rim, a worn boot, and failed bearings are also replaced. But there are other malfunctions that you can fix. If a winding breakdown occurs, then the stator and armature must be rewound. It is necessary to monitor the lubrication and lubricate some parts from time to time.

The drill does not hold in the chuck

The reason that the hammer drill does not hold the drill lies in the breakdown of the cartridge and the wear of its parts:

  • there was a deformation of the balls;
  • the stop ring is worn out;
  • the fixing spring has sagged.

You will need to disassemble the cartridge and replace the problem parts.

Pistol perforators

The device of the percussion mechanism of the pistol-type unit is slightly different from the mechanism of the same purpose installed in the barrel-type unit.

Its main difference is that the piston does not move with the help of a connecting rod, but from a swinging (“drunken”) bearing. Therefore, the most common failure of this unit is the wear of a “drunken” bearing that needs to be replaced.

The next photo shows a destroyed “drunken” bearing, which is the reason that the hammer drill stopped hammering.

The swinging bearing is removed using a flat screwdriver, with which you need to pick up the bracket and remove it. After that, the bearing is easily separated from the gear housing.

When replacing a collapsed bearing, rinse the gearbox well, since it is in its housing that fragments of a broken part can remain.

After cleaning and installing a new bearing, apply a grease layer of grease to this block.

Also, the reason that the device does not hit may be a broken firing pin. To get it, you need to remove the retaining ring, which is visible in the hole.

Take a small screwdriver, hook the ring with it, and slide it to the right (towards the gear).

Do the same on the other side of the part. Next, insert a screwdriver into the hole of the part and push the removed inner parts of the mechanism.

After this action, you can easily get the retaining ring, and the body, which contains the broken striker.

Bosch Hammer Drill Repair / Bosch GBH 2-26 DFR

If you disassemble this case, then you will see the “culprit” of the malfunction, due to which the hammer drill does not hammer.

When assembling the striking mechanism, be sure to apply generous grease to all parts.

We disassemble the case

If disassembly of the unit body is required, then first you need to remove the mode switch.

  • Place the switch in the “Shock” position. Usually a hammer is drawn in this place on the body. If this mode is not available, put the switch in the position “Impact drilling”.
  • Next, you should press the button located on the switch handle and turn it slightly below the hammer icon until it clicks.
  • After that, you need to pry the switch with a screwdriver and, pulling it towards you, remove it. In some models of units, this switch can be screwed to the body.
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Dismantling the punch and removing the cartridge

To repair a hammer drill, you first need to properly disassemble it. And we begin to do this by disassembling the cartridge.

  • Remove the rubber tip and retaining ring;
  • Remove the washer and conical spring;
  • We take out the side balls (preferably with a magnet);
  • We put the lever of the operating modes in the position equivalent to the maximum, and remove the switch knob. We fix the position;
  • Remove the rear handle and motor brush;
  • Unscrew 4 screws near the drill to remove the front cover;
  • We take out the barrel and shaft, and with a screwdriver. the bracket and bearing;
  • Open the back cover and take out the reverse switch;
  • We remove the rotor, for which we unscrew the crepes and disconnect the terminals from the starter, which also needs to be removed by removing the protective casing.

Important! When disassembling, be extremely careful about where and when you remove certain parts. Fold them up so that you don’t lose them in any way. It depends on whether you fold the instrument back or not.

Repair of drills Bosch and its features

A hammer drill is a construction tool with which slotting and drilling operations are performed. Thanks to a special mechanism, the hammer drill is very effective and quickly punches a hole in different materials. It can be used in work with concrete, brick, metal, wood, stone. Bosch rotary hammers are very common among builders and ordinary people, so it is very important to know how these devices are repaired in the event of a breakdown.

It is important to pay attention to the original models! There is a fake Bosch Hammer Drill 32 hammer drill. Beware of fakes!

Repair of rotary hammers Bosch 2 24

In this bosch gbh 2 24 dsr rock drill, the intermediate shaft consists of a shift part, a bearing assembly and a clutch. The latter deteriorates most often, because the teeth in it wear out quickly. Repair of this breakdown consists in correcting the profile of the teeth of the engagement. You will often notice that there is no hit. The hammer drill may gradually stop hammering due to wear of the rubber parts that need to be replaced in time. And if you use more than necessary force, this can lead to the fact that the firing pin is jammed in the impact piston.

Repair of rotary hammers Bosch 2 26

Before you fix something in this model, you need to familiarize yourself with the features of the device, the scheme and the principle of operation. The rotor shaft transmits rotation to the barrel shaft through an intermediate shaft, the bearing of which directs the return movement to the impact piston.

When disassembling the barrel shaft in the impact unit, you need to pay special attention to fixing the spur gear. Before removing it, it is necessary to remove 3 pins on which it is fixed in this model.

Do-it-yourself Bosch hammer drill repair

If any parts in the tool are damaged, broken or poorly performing their function, then they just need to be replaced. If the brushes are worn out, then when disassembling them, they are simply replaced with new ones. A hammer drill chuck with a slow rotation of the rim, a worn boot, and failed bearings are also replaced. But there are other faults that you can fix. If a winding breakdown occurs, then it is necessary to rewind the stator and the armature. It is necessary to monitor the lubrication and lubricate some parts from time to time.

Rotary hammer device Bosch

Rotary hammers are of two types:

  • with horizontal engine installation (the barrel and the engine armature are placed in parallel);
  • with vertical installation of the engine (the same parts are at right angles).

Electrical and mechanical parts are the main components of this tool.

The electrical part consists of:

  • engine;
  • engine control device (sometimes combined with a switch);
  • on / off switch;
  • elements that suppress interference;
  • power cord.

The mechanical composition is as follows:

  • a gearbox that is attached to the motor shaft;
  • impact mechanism;
  • clutch.

This device may be supplied with various add-ons in the form of a drill, crowns, vacuum cleaner and other parts.

Repair of perforators Bosch 2-28

In this model of the tool, the splines sometimes wear out. In this case, it is necessary to disassemble the gearbox (it is almost similar to Bosch 2-24, only the bearing is different). It is better to replace the entire barrel, because the strikers wear out along with the splines.

As you can see, the repair of punchers can be done at home with your own hands. At the same time, do not spend large sums on various types of repairs in service centers, which, as we know, are very expensive. But do not forget that you must adhere to the rules of use and safety precautions.