Do-it-yourself Interskol 710 perforator repair

In detail: do-it-yourself repair of the Interskol 710 perforator from a real master for the site my.housecope.com.

The hammer drill is one of the most important tools in the repairman's arsenal. That is why it is popular for construction work of increased complexity. In order to use a perforator correctly, you need to know its device, have the initial skills in its repair and preventive maintenance. The line of products of the "Interskol" company is widely represented in the shops of construction equipment. The company occupies one of the leading positions in the sales of rock drills. One of the models is P 710ER, the maintenance of which will be described below.

The tool is capable of working in three modes: drilling, hammering and drilling with hammering. The SDS plus type chuck helps to quickly change attachments for the job. The overload clutch can prevent tool breakage if the drill gets stuck in the material.

The hammer drill has one speed and speed control. Additional features of the tool include an additional handle, depth gauge and blocking of the power button.

All rotary hammers of the firm are assembled according to the same scheme. There are three main blocks here: shock reducer block, power supply, stator block.

These mechanisms have their own characteristics for different groups of instruments.

Let's start with the keyless chuck. The disassembly process consists of the following points:

Removing the special ring
Removing the release sleeve
Removing another special ring and ball
Removing the coil spring

In order to remove the gearbox housing, you must first dismantle the mode selector knob.

Then the barrel, strikers and strikers are disassembled. The intermediate shaft is disassembled in order of successive parts. The electrical part consists of three blocks - a rotor, a stator and a control circuit with carbon brushes. All blocks are disassembled in detail. After that, the punch can be considered completely disassembled.

Video (click to play).

The tool can only be repaired after the expiry of the specified warranty period. Mechanical damage is much more difficult to fix than problems with the electronic unit. It takes time to establish the cause of the breakdown - you need to inspect all the mechanisms. After that, you can fix the problem that has arisen.

If the device turns on, but does not perform the chiseling function, then the breakdown may lie in the operating mode switch. Finger wear on the switch may indicate a problem. Wear is due to constant contact with rotating machinery.

There is also such a variety as a breakage of the extension of the retainer holding it inside the gearbox. In this case, the mode can be switched arbitrarily. However, this does not affect the performance of the instrument.

If this malfunction does not cause much trouble to the owner, then you just need to turn the switch strictly 180 degrees.

The biggest loads are experienced by the keyless chuck of a perforator, if it breaks down, you need to purchase a new one and replace it. To extend the life of this mechanism, you just need to do regular cleaning from dust and dirt that accumulate during operation.

General rules apply to the P 710ER model. It is necessary to disassemble the tool according to the established instructions, then identify the problem in the work, if possible, eliminate it in full and assemble it according to the same scheme.

To properly repair a faulty tool, you must first carefully familiarize yourself with its device.If there is a guarantee for the tool, it is recommended that in case of a breakdown, immediately contact a specialist. Do not forget that the operating conditions of the tool, the load on it, precautions and careful care of vulnerable parts also play an important role.

Home page »Publications» Instructions and diagrams for assembling do-it-yourself Interskol perforators

Perforators are quite unpretentious in maintenance. To maintain the working condition of the Interskol perforator, it is necessary to timely change the lubricant in the gearbox whenever the worn carbon brushes of the electric motor are replaced.

Old grease must be removed without fail; it is preferable to remove it with special detergents used in service centers. But a home craftsman will do just fine with a solution of a mixture of kerosene and gasoline. Do-it-yourself Interskol perforator assembly is a fairly simple technological process. You just need to read the disassembly instructions, diagram, spare parts catalog.
Prepare new or repaired and cleanly washed parts, a new O-ring repair kit, lubricants, tools and supplies before assembly. Do not forget about the correct preparation of the workplace and the lighting on it.

New grease is filled on cleanly washed parts and only the one that is recommended for this unit.

When laying new lubricant, do not overdo it: excess lubricant during the operation of the rock drill is often squeezed out through the gearbox housing and lead to the destruction of the oil seals.

Check internal surfaces for roughness before assembling parts. The surface should be polished to a mirror finish. With a low roughness, the abrasion of the rubber O-rings is more intense. Details about the repair of the Interskol perforator.

The assembly of Interskol perforators can be conditionally divided into several stages:

Installation of rubber sealing rings.
Assembly of individual units.
Assembling blocks.
Assembling the electrical part.
Checking the performance of the power tool.

All Interskol rock drills consist of several large blocks:

Impact unit mechanical block.
Intermediate shaft block.
Reducer block.
Stator block.
Control circuit block.

Domestic manufacturers have developed special lubricants for the lubrication of rock drills. The lubricant is divided according to the operating conditions of the units. It is recommended to use lubricants specially formulated for these assemblies to lubricate the gearboxes, rolling bearing and clutch.

Lubricants are conventionally divided into three categories:

For particularly loaded units, such as an impact mechanism, gearbox, intermediate shaft.
For the lubrication of drill shanks.
For lubricating rubber O-rings.

It is advisable to use Tsiatim-221 as a lubricant for rubber sealing rings, which does not destroy rubber.

Special lubricants are used for the gearboxes of Interskol rock drills.

Before installing the rubber sealing rings on the parts, the latter must be lubricated with an inert rubber grease that can withstand temperatures up to +120 ºС.

It is recommended to use not only a lubricant that is inert for rubber, but also provides a high seal during operation. From domestic lubricants, pay attention to Tsiatim-221.

For a secure grip of the tool, easy removal at the end of work, it is recommended to use a special bunch for shanks.

In Interskol perforators, the percussion unit block consists of a barrel and parts of the percussion mechanism.

Let's consider the assembly of the shock unit using the example of the Interskol 26 / 800ER perforator barrel.

The percussion mechanism consists of an industrial mass, pos. 16, a barrel, pos. 37, a striker, pos. 45, and a piston, pos. 47.

The shock pulse is created due to the reciprocating movement of the piston, pos. 47, in the barrel, pos. 36. The striker, pos. 45, moves inside the piston and transmits an impulse to the industrial mass, pos. 16.And now the industrial mass transmits a shock impulse to the instrument receiver, pos. 12. In the given chain there is one more device that smooths out the magnitude of the shock impulse from the striker to the industrial mass. The device is called a striker catcher pos. 42.

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On the barrel poz.36 put on gear poz.35, on the other side of the cam sleeve poz.38 and the connection gear-cam sleeve is fixed with needle rollers poz.37 and a retaining ring poz.34.

The gear is pressed by the spring, pos. 33, a washer, pos. 32, is put on the barrel, and everything is fixed with a retaining ring, pos. 31.

The barrel is inserted into the body, pos. 18, into which the collar, pos. 19, is preliminarily inserted, the roller bearing, pos. 20, and the sleeve, pos. 21, are pressed in.

The assembly of the barrel ends with the installation of the striker and catcher inside after lubricating the inner surfaces. The installation of the catcher in the barrel body is fixed with a retaining ring.

Piston assembly pos. 47 start by installing a finger on it, pos. 48, and two rings, pos. 49. The pin acts as a leash from the rolling bearing pos.60. A striker, pos. 45, with a pre-installed O-ring, pos. 46, is inserted into the piston.

Before inserting the firing pin inside the piston, the inner surface of the piston must be checked for roughness. There should be no scratch marks on the surface.

After lubricating the inner surface of the piston with a thin layer of Ciatim-221, insert the firing pin inside.

In the construction of the Interskol P-26 / 800ER perforator, the working tool is inserted into a special tool receiver and clamped in the chuck.

Assembling the tool receiver pos. 12 is simple.

The assembled industrial mass assembly, pos. 16, is inserted into the inside of the receiver. On the industrial mass, you must first put on the sleeve pos. 15, the cuffs pos. 14, the rubber ring pos. 13. Be sure to lubricate the rubber O-ring and the inside of the barrel receiver with Ciatim-221 grease before assembly.

In the Interskol P-26 / 800ER perforators, the intermediate shaft is a complex unit.

Assembling the intermediate shaft is easy.

First, the components of the rolling bearing OZ.60 are assembled. A needle bearing pos. 61 and a combined gear wheel pos. 62 are inserted into the bearing.

The assembled unit is inserted into the body, pos. 53, with the simultaneous installation of the piston, pos. 47. Before installation, the rolling bearing driver is inserted into the pin, pos. 48.

The installed intermediate shaft is fixed with a bracket pos. 50.

At the next stage, the pinion shaft pos. 58 is installed in the intermediate shaft, with the switch leash, pos. 55, put on it.

The assembled unit is lubricated with gear grease.

It remains to put on the barrel of the piston pos. 36.

Lubricate the gears of the gearbox with the recommended grease and cover with the cover of the outer casing of the gearbox, pos. 18.

Clamp the vertical rock drill in a vise and assemble the keyless chuck. After lubricating the inside of the barrel, insert the tool receiver.

Align the holes of the tool receiver and the barrel, then insert the rollers (pos. 11) into them.

Put on the conical spring (pos. 10) from above, a special washer (pos. 9) and insert the ball (pos. 8).

Put the ring (pos. 7) on the tool receiver, push bush (pos. 6). Fix the structure with the retaining ring pos. 5.

It remains to put on the washer (pos. 4), fix it with the second retaining ring (pos. 3).

Putting on the washer, pos. 2, install the protective sleeve, pos. 1.

Lay the Interskol rotary hammer on its side to allow access to the hole for installing the mode selector knob.

The handle is easy to install. You just need to get your antennae into the grooves of the switch. The handle is inserted in the opposite position "impact + drilling", rotated through an angle of 15º and fixed with a latch by pressing the white button.

The installed button is rotated clockwise to verify correct operation.

The stator unit of the Interskol P-26 / 800ER perforator is no different from the stator units of any other perforator.

A stator, pos. 74, is inserted into the stator housing, fastened with screws, pos. 73, and closed with a diaphragm, pos. 72.

The rotor, pos. 69, is inserted into engagement with the helical gear of the intermediate shaft.

The assembly of the Interskol P-26 / 800ER perforator is completed by installing the stator housing cover, pos. 77.

After fixing the housing cover, proceed to the installation of the brush holder, pos. 81. Installation of the brush holder does not cause any difficulties.

Install carbon brushes (pos. 83) into the brush holder, fix them with clamping spiral springs (pos. 84).

It remains to insert the switch button pos.87, connect the wires to the stator terminals, hide the wires in the handle of the puncher.

Having assembled the Interskol perforator, make sure to turn the rotor shaft lightly by turning it by the tool receiver.

Inspect for correct and even fit of the carbon brushes. Connect the instrument to 220 V.

Briefly turn on the hammer drill and observe the sparking of the carbon brushes.

Install the protective cover, pos. 85.

The assembly of the remaining models of Interskol perforators is practically no different and is shown in the video below.

Correct operation of the Makita 2450 rotary hammer with a collector motor is accompanied by slight sparking of the brushes in the collector area. U is working properly.

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Repair instructions
reducer of P710 perforators Interskol, BPR 241 SPARKY, P1-750-RE, P2-850-RE Fiolent

Remove sequentially:
- special ring 1,
- releasing sleeve 2,
- ring 3,
- ball 4,
- spring 5.
Pull the bearing shield out of the casing 8 by 3-4 mm, remove the switch 28a.
Remove the bearing shield from the casing.
Remove sequentially:
- retainer 31,
- spring 30,
- ring 29.
Remove the closing spring 22.

Remove sequentially:
- spring 21,
- locking bar 20,
- front switching bar 17,
- rear switching bar 18,
- spring 19 from the axis.

Remove washers 10, 16 and 55, spindle assembly and intermediate shaft 50 from bearing shield 24.
Remove washer 43 and springs 42.
Remove bearing 51.
Remove gasket 26.
If necessary, remove from bearing shield 24: bearing 23, bearing 52.
Note: Washer 10 serves to provide mounting distances and may not be available on some machines.

Remove ring 11, washers 12, spring 13 and toothed wheel 14.
Remove cylinder 40 with piston 38.
Remove piston 38 from cylinder 40.
Remove ring 37 from spindle 15.
Remove sequentially:
- catcher sleeve 35,
- rubber washer 34,
- intermediate striking body 33.
If necessary, remove rings 32, 36, 39. Remove axle 41 and washers 27.

Pull off the gear wheel of the intermediate shaft 44 and the switching bushings 45 and 46 in sequence.
Remove the large idler gear 49 and the oscillating bearing 48 from the idler shaft 47.
Tools: rack press, gasket, mandrel.

Coat intermediate shaft 47 with grease 5 in an amount of about 1 g.
Press in pivot bearing 48 and large intermediate gear 49 in sequence.
Assemble in series the shift sleeve 46 and the gear wheel of the intermediate shaft 45.
Tools: rack and pinion press, sleeve (pipe) with an inner diameter of 8 mm.

1. Apply grease to the bore of cylinder 40.
2. Assemble washers 27 and axle 41.
3. Insert ring 39 into piston bore 38.
4. Apply grease to the cylinder bore and piston.
5. Insert piston 38 into cylinder 40.

1. Install rings 32 on the intermediate striker 33.
2. Insert ring 36 into the bore of the clamping sleeve 35.
3. Put in sequence:
- gear wheel of the spindle 14,
- spring 13,
- washers 12,
- ring 11 on spindle 15.
Insert the following into the spindle:
- intermediate striker 33,
- rubber washer 34,
- clamping sleeve 35,
- ring 37.
Note: The clamping bush 35 is inserted with a large chamfer into the ring 37.
Tools: rack and pinion press, pliers and mandrel for pressing rings 37, sleeve for pressing rings 11

Install the intermediate switch strip 18 on the switch strip 17 and the spring 19 so that the spring is between the intermediate switch strip 18 and the switch strip 17, as shown in the figure.
On axis 53, set in sequence:
- spring 21,
- locking bar 20,
- switch strip 17 together with intermediate switch strip 18 and spring 19.

Place bearing 23 and bearing 52 on bearing shield 24.
Place the spindle assembly on the bearing shield and measure the mounting clearance.
With a clearance of 92.38. 92.7 install the washer pos. 10.
With a clearance of 92.7. 93.32 - washer pos. 10 is not installed.

Insert cylinder with piston 40 into bearing shield 54.

Install bearing assembly 51 on intermediate shaft 50.
Assemble the bearing shield 54, the intermediate shaft assembly and the bearing assembly 51 so that the thrust bearing axis enters the cylinder axis hole, as shown in the figure.

Place gasket 26 on the bearing shield.
Install the SW shifting mechanism on the bearing shield so that the fork of the shifting bar enters the channel of the shifting sleeve.
Assemble washers 55 and 16 and the spindle assembly SP in sequence.
Note: Turn the switching bush so that its cams touch the end surface, without entering the channels of the thrust bearing 48.

Collect:
- washer 10 (if necessary, see point 10),
- washer 43,
- springs 42.
Place the locking spring 22 on the bearing shield.

Set on switch 28:
- ring 29,
- spring 30,
- retainer 31.

Install the gearbox on the panel, leaving a distance of 3-5 mm until final closure. Install the switch 28 on the gearbox in such a way that the pin falls into the slot of the intermediate switch strip.
Smoothly turn the switch 28 to the position "drilling with hammer action", while simultaneously pressing the gearbox until the gearbox is completely closed.
Insert spring 5 and ball 4 into the spindle. Apply grease 3 to the ring 3 and insert it into the releasing bush 2. Insert the releasing bush into the spindle.

Mode switch
The switch must move easily, without tightening, and the end positions must be clearly fixed.

1. Starting position for assembling the reducer
The gearbox is installed in a vertical position.
Mutual arrangement of parts and assemblies:
- centering bushings 9 are installed in the shield,
- the fingers of the rear shifting sleeve 46 are not engaged with the oscillating bearing,
- the fork of the rear shifting bar 18 is engaged in the channel of the rear shifting sleeve 46,
- the fork of the front shifting bar 17 is hooked into the channel of the front shifting sleeve 45,
- the toothed wheel of the intermediate shaft 44 is meshed in the front shift sleeve 45.
The free movement of the front shifting bar 17 and through it the front shifting bush 45 is checked - after several compressions and releases of the spring 19.

2. Assembling the gearbox with the housing
The closing spring 22 is pressed into the inside of the gearbox and the gearbox housing, set 8, is installed on the gearbox. In this case, it is necessary to orient the spindle set so that it fits into the needle bearing in the housing.
The gearbox housing 8 is held with one hand so as not to allow it to completely close the gearbox, a stroke of 4-5 mm remains.
Moreover, it must be in the following position:
- through the hole for the switch, the channel formed by the front and rear switch strips should be visible;
- the fork of the closing spring 22 must match (without entering) with the hole for the switch.

3. Final assembly of the gearbox
- the switch 28 is mounted in the hole of the gearbox housing 8 in the position indicating the "drilling with impact" mode,
- the switch is turned clockwise to the hammer mode,
- pressing and orienting the housing down to the shield, completely close the gearbox so that the position of the bearing shield end is aligned with the end (edge) of the housing.
At this moment, the centering bushings, the intermediate shaft and the axis of the mode switching unit simultaneously enter the corresponding sockets of the gearbox housing and, possibly, the housing is not immediately installed to the end. To facilitate final closing, it is necessary to turn the switch several times from the hammer mode position to the hammer drilling mode position.
- after the installation in the final position of the gearbox housing, it is necessary to check the inclusion in the "drilling" mode. If this switching is carried out easily and without problems, then the final assembly of the gearbox was successful. After this check, the switch is set to the "hammer drilling" position.
They are connected in series to the spindle: ball 4, spring 5, sleeve 3, releasing sleeve 2 and ring 1.

Recommended lubricants when repairing rock drills

Designation

Manufacturer designation

Manufacturer

Working temperature, o C

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New grease is filled on cleanly washed parts and only the one that is recommended for this unit.

When laying new lubricant, do not overdo it: excess lubricant during the operation of the rock drill is often squeezed out through the gearbox housing and lead to the destruction of the oil seals.

The assembly of Interskol perforators can be conditionally divided into several stages:

Installation of rubber sealing rings.
Assembly of individual units.
Assembling blocks.
Assembling the electrical part.
Checking the performance of the power tool.

All Interskol rock drills consist of several large blocks:

Impact unit mechanical block.
Intermediate shaft block.
Reducer block.
Stator block.
Control circuit block.

Lubricants are conventionally divided into three categories:

For particularly loaded units, such as an impact mechanism, gearbox, intermediate shaft.
For the lubrication of drill shanks.
For lubricating rubber O-rings.

It is advisable to use Tsiatim-221 as a lubricant for rubber sealing rings, which does not destroy rubber.

Special lubricants are used for the gearboxes of Interskol rock drills.

Domestic grease for rotary hammer gearboxes

Before installing the rubber sealing rings on the parts, the latter must be lubricated with an inert rubber grease that can withstand temperatures up to +120 ºС.

It is recommended to use not only a lubricant inert for rubber, but also providing a high seal during operation. From domestic lubricants, pay attention to Tsiatim-221.

Domestic grease for rubber sealing rings in rock drills

For a secure grip of the tool, easy removal at the end of work, it is recommended to use a special bunch for shanks.

Domestic grease for rock drills

In Interskol perforators, the percussion unit block consists of a barrel and parts of the percussion mechanism.

Let's consider the assembly of the shock unit using the example of the Interskol 26 / 800ER perforator barrel.

The percussion mechanism consists of an industrial mass, pos. 16, a barrel, pos. 37, a striker, pos. 45, and a piston, pos. 47.

The shock pulse is created due to the reciprocating movement of the piston, pos. 47, in the barrel, pos. 36. The striker, pos. 45, moves inside the piston and transmits an impulse to the industrial mass, pos. 16. And now the industrial mass transmits a shock impulse to the instrument receiver, pos. 12. In the given chain there is one more device that smooths out the magnitude of the shock impulse from the striker to the industrial mass. The device is called a striker catcher pos. 42.

On the barrel poz.36 put on gear poz.35, on the other side of the cam sleeve poz.38 and the connection gear-cam sleeve is fixed with needle rollers poz.37 and a retaining ring poz.34.

The gear is pressed by the spring, pos. 33, a washer, pos. 32, is put on the barrel, and everything is fixed with a retaining ring, pos. 31.

The barrel is inserted into the body, pos. 18, into which the collar, pos. 19, is preliminarily inserted, the roller bearing, pos. 20, and the sleeve, pos. 21, are pressed in.

Barrel, firing pin, catcher before assembly

Before inserting the firing pin inside the piston, the inner surface of the piston must be checked for roughness. There should be no scratch marks on the surface.

After lubricating the inner surface of the piston with a thin layer of Ciatim-221, insert the firing pin inside.

In the construction of the Interskol P-26 / 800ER perforator, the working tool is inserted into a special tool receiver and clamped in the chuck.

Details of keyless chuck and tool receiver for perforator Interskol P-26 / 800ER

Assembling the tool receiver pos. 12 is simple.

The assembled tool receiver is inserted into the barrel, pos. 36.

In the Interskol P-26 / 800ER perforators, the intermediate shaft is a complex unit.

Assembling the intermediate shaft is easy.

First, the components of the rolling bearing OZ.60 are assembled. A needle bearing pos. 61 and a combined gear wheel pos. 62 are inserted into the bearing.

Details of the blast hole of the Interskol P-26 / 800ER perforator before assembly

The assembled unit is inserted into the body, pos. 53, with the simultaneous installation of the piston, pos. 47. Before installation, the rolling bearing driver is inserted into the pin, pos. 48.

The installed intermediate shaft is fixed with a bracket pos. 50.

Installing the retaining bracket

At the next stage, the pinion shaft pos. 58 is installed in the intermediate shaft, with the switch leash, pos. 55, put on it.

The assembled unit is lubricated with gear grease.

It remains to put on the barrel of the piston pos. 36.

Lubricate the gears of the gearbox with the recommended grease and cover with the cover of the outer casing of the gearbox, pos. 18.

Clamp the vertical rock drill in a vise and assemble the keyless chuck. After lubricating the inside of the barrel, insert the tool receiver.

Align the holes of the tool receiver and the barrel, then insert the rollers (pos. 11) into them.

Put on the conical spring (pos. 10) from above, a special washer (pos. 9) and insert the ball (pos. 8).

Keyless chuck details

Put the ring (pos. 7) on the tool receiver, push bush (pos. 6). Fix the structure with the retaining ring pos. 5.

It remains to put on the washer (pos. 4), fix it with the second retaining ring (pos. 3).

Putting on the washer, pos. 2, install the protective sleeve, pos. 1.

Lay the Interskol rotary hammer on its side to allow access to the hole for installing the mode selector knob.

The installed button is rotated clockwise to verify correct operation.

The stator unit of the Interskol P-26 / 800ER perforator is no different from the stator units of any other perforator.

A stator, pos. 74, is inserted into the stator housing, fastened with screws, pos. 73, and closed with a diaphragm, pos. 72.

Electrical assembly diagram

The rotor, pos. 69, is inserted into engagement with the helical gear of the intermediate shaft.

The assembly of the Interskol P-26 / 800ER perforator is completed by installing the stator housing cover, pos. 77.

Assembly of Interskol P-26 / 800ER perforator bodies

After fixing the housing cover, proceed to the installation of the brush holder, pos. 81. Installation of the brush holder does not cause any difficulties.

Install carbon brushes (pos. 83) into the brush holder, fix them with clamping spiral springs (pos. 84).

It remains to insert the switch button pos.87, connect the wires to the stator terminals, hide the wires in the handle of the puncher.

Having assembled the Interskol perforator, make sure to turn the rotor shaft lightly by turning it by the tool receiver.

Inspect for correct and even fit of the carbon brushes. Connect the instrument to 220 V.

Briefly turn on the hammer drill and observe the sparking of the carbon brushes.

Install the protective cover, pos. 85.

The assembly of the remaining models of Interskol perforators is practically no different and is shown in the video below.

An electric rock drill is perhaps the most popular device that I use at construction sites, repairs, etc.

This tool is operated in rather harsh conditions - vibration, increased dustiness, power surges and others. All this, sooner or later, leads to the fact that the tool will fail and require repair.

An electric rock drill is a complex engineering product that consists of assemblies that ensure the movement of a chuck with a drill installed in it. Basically, a hammer drill is a device that converts electrical energy into mechanical energy.

Depending on the operating conditions, this device may have mechanical and electrical problems.

The hammer drill scheme is pretty close to that of an electric drill. One of the differences is that instead of an ordinary gear pair transmitting torque to the tool, a full-fledged gearbox is mounted in the hammer drill. It is designed to convert the torque generated by the electric motor into the reciprocating movement of the chuck.

Malfunctions requiring repair can occur in almost any part of the device. But before starting the repair, it is required to diagnose the breakdown and identify the reasons that led to its appearance.

It should be noted that detecting a breakdown is not difficult, but sometimes you have to disassemble the punch body for this.

Like any technical device, an electric rock drill has some weak points in its design. It is they who are the cause of breakdowns that require repair. It is not uncommon for a perforator to fail due to the fault of a worker who operates it at extreme modes and in violation of operating rules.

It must be understood that the main faults occur in the electrical or mechanical part. In the mechanical part, the following problems most often occur:

the device does not perform its main functions - drilling and drilling;
jamming of the drill in the chuck;
the nozzle is not installed in the chuck;
extraneous noise during the operation of the device.

In an electrician, the following defects are most often manifested:

the engine does not work;
excessive sparking of brushes;
the appearance of burning or the smell of burnt insulation.

The beginning of the repair begins with cleaning the body of the device. This is necessary at least to prevent dirt from getting into the disassembled perforator.

When repairing an electric rock drill, there is often a need to disassemble it. But before you start it, you need to make sure once again that the problems have arisen precisely in the mechanical part of the device. We will analyze in detail what problems are encountered and how they can be eliminated

Untimely maintenance, poorly performed repairs, operation of the hammer drill in extreme modes can lead to the fact that any part that is part of this mechanism can fail. To identify defects in the gearbox, it is necessary to disassemble it, rinse the parts and then carry out a thorough inspection.

Revealed damaged parts must be replaced with new ones. Then assemble the gearbox, of course, you need to put grease into it. By the way, the brand of lubricant must be indicated in the operating manual.

If the nozzle does not enter the working position, then most likely the reason lies in the cartridge. To eliminate this defect, there is no need to disassemble the tool. As a rule, interference with the installation of the nozzle consists in the fact that any debris has got into the chuck.

To identify malfunctions in the mode switching device, the punch will still have to be disassembled. In principle, a defect can be identified by a careful examination of the switching mechanism.

Mode switch repair

In principle, the main components are listed, in which breakdowns most often occur and require repair. Meanwhile, there are several more types of defects that can arise for various reasons. For example, there is no impact hammer mode. That is, the drill rotates together with the chuck, but does not have an impact on the working surface. The most common cause, in this case, is a floating bearing. Damage to the steel striker may be another cause of this malfunction. In both cases, replacement of the defective part is required.

It is not uncommon for the engine to run when the tool is turned on, but the chuck does not rotate. This happens most often because the gearbox is stuck. By the way, it is unacceptable to keep the hammer turned on for a long time; it is unacceptable when the chuck is inoperative, the motor winding may burn out. The hammer drill will have to be disassembled and defects in the gearbox removed. They can be caused either by damage to the gears or by debris falling into it.

Another defect is that the chuck cannot fix the drill. This problem can arise with a tool that has been in use for a long time. The cause of this problem lies in the wear of the retainer housing mount.Malfunctions associated with the electrical part of the hammer drill can also cause serious problems. By the way, a failure in work can be caused by a trivial lack of voltage in the outlet.By the way, troubleshooting should start with less. That is, it is necessary to check the presence of power in the electrical network, the integrity of the wire and outlet.By and large, if the instrument does not show any signs of life, it is likely that the electrical part of the instrument is out of order. The main electrical defects include the following:Any electrical device can be connected for testing. If there is voltage in the network, then it is necessary to check the integrity of the cable.To identify this defect, they inspect it, then, using a tester, ring it. To eliminate a cable break, you can either solder it or twist it. But it's best to replace it.The cause of this defect may be elementary oxidation of the contacts in the button. To test this assumption, it is necessary to dismantle the rear casing cover. If there are no visible signs of oxidation, it is advisable to use a tester. To correct this malfunction, you can clean the contacts, but it is better to replace the power button.

With prolonged and intensive use of the perforator, the brushes wear out, through which electric current flows to the motor. With a lot of wear, they begin to spark and a burning smell appears. The brush must be at least 8 mm long.