Perforator interskol DIY repair

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

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.

Video (click to play).

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 inert for rubber, but also providing 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.

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 to “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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Perforators Interskol, according to statistics, are reliable tools. Failures are recorded much less often than in the more popular Makita, Bosch, Hitachi models.

The main rule: choose a model that is designed for loads and is designed to perform the planned work.

The use of perforators for their intended purpose in accordance with the requirements for operation allows you to work with Interskol perforators for a long time.

But, like any tool, various malfunctions appear in the punchers that will require you to repair the puncher yourself, especially if it is no longer under warranty.

In order to repair Interskol perforators, to eliminate malfunctions, it is necessary to carefully study the device of the tool, its diagram, lubrication cards.
Any repair of the Interskol perforator begins with its disassembly in more detail.

Interskol rock drills are highly maintainable, simple and reliable.

Do-it-yourself Interskol perforator repair can be performed by any user who knows how to hold a screwdriver, a hammer and who is versed in electrical engineering at the high school level.

All malfunctions occurring in Interskol perforators are conventionally divided into three groups:

Mechanical breakdown of the striking mechanism;
Destruction of the mode switch;
Malfunction of the electrical part of the hammer drill.

Let's consider all the malfunctions using the Interskol P-26 / 800ER perforator as an example.

The first group of malfunctions includes breakdowns associated with the failure of parts of the percussion mechanism.

This group of faults is manifested in the fact that during operation the hammer drill drills, but cannot hammer.

The weakening of the impact force occurs gradually. As the rubber rings wear out, air escapes in the pneumatic shock-generating system. The force of the blow weakens, the blow becomes hard. In addition to the loss of pneumatic properties, the destruction of strikers, strikers, press masses occurs.

A set of rubber sealing rings for the Interskol perforator

Repair of the Interskol perforator when the O-rings are worn out consists in replacing them with new ones.

The installation of new rubber rings is carried out at any disassembly of the perforator with the obligatory application of lubrication of the O-rings with lubricants inert to rubber products. Such greases include the domestic grease of the Tsiatim-224 type, produced in accordance with GOST 9433-80.

The rubber O-ring is lubricated with a thin layer of Tsiatim-224 grease and put on the desired part, previously washed from the old grease in a solution of a mixture of kerosene and gasoline.

If the rubber O-rings are very worn out and if they are not replaced in time, the press mass, pos. 16, the barrel, pos. 36, the body of the catcher, pos. 40, and the striker, pos. 45, are destroyed. From the impact on the parts, work hardening, cracks, curvatures, jamming appear.

Malfunctions are eliminated by replacing parts with new ones with the obligatory change of seals.

Details of the percussion block perforator Interskol P-26 / 800ER

The destruction of the piston pos. 47 is of two types:

The piston skirt collapses;
The ears of the installation of the finger, pos. 48, are broken off.

Repair of the Interskol P-26 / 800ER perforator and its destroyed piston is performed by replacing the piston with a new one. When purchasing a piston, carefully check the roughness of the inner surface of the piston. It should be finished to a mirror finish.

Barrel failure pos. 36 does not appear often. The main reason is scratches on the inner surface when strikers, strikers, industrial mass fail.

If the depth of the scratches is not large, then the scratches can be removed by grinding. With a large depth of scratches, it is impossible to ensure tightness, and this affects the operation of the hammer drill in the "Impact" mode.

The shock impulse is created not only by the pneumatic system of the percussion mechanism, but also by converting the rotary motion into reciprocating motion due to the operation of the rolling bearing pos.60. There are cases of destruction of the bearing race.

If the rolling bearing is destroyed, the repair of the Interskol P-26 / 800ER perforator consists in a complete replacement of the part.

Violation of the transfer of torque to reciprocating can be interrupted due to slipping of the splines of the gear combined gear wheel pos. 62 in the splines of the rolling bearing pos. 60.

The malfunction is eliminated by correcting the tooth profile with a round file.

The disappearance of the impact mode is manifested when the mode switch is not working properly. Moving the mode switch knob does not move the switch leash, pos. 55.

The breakage is eliminated by correcting the assembly of the intermediate gear shaft pos. 58.

A group of faults in which hammer hammer, but does not drill.

Loss of drilling during a running impact is manifested when the gears, pos. 35, are turned on the barrel shaft pos. 36.

The gear is fixed on the barrel by three rollers pos. 37. And to keep it securely, the gear is pressed down by the spring pos. 33, which is fixed through the washer pos. 32 with the retaining ring pos. 31.

The malfunction appears due to the weakening of the pressure spring force, the falling out of the rollers, the destruction of the cam sleeve pos. 38.

Do-it-yourself repair of the Interskol P-26 / 800ER perforator consists in restoring all parts to the required position or replacing those that have failed.

The intermediate shaft in the hammer drill serves to transmit rotational and reciprocating impulses.

If any part installed on the intermediate shaft starts to rotate due to breakdowns, the hammer drill stops drilling.

Let's consider the principle of operation of the intermediate shaft of the Interskol P-18 / 450ER perforator.

Rotation is transmitted to the shaft by means of gear pos. 46, which is turned by the rotary hammer rotor. The gear is put on the shaft, pos. 43, where the cam coupling half, pos. 44, and the rolling bearing, pos. 45, are attached.

The impact mode is switched on by moving the switch bar, pos. 55, which disengages the rolling bearing from the cam half-coupling, pos. 44.

At the intermediate shaft of the Interskol P-26 / 800ER perforator, a combined gear wheel pos. 62 can be rotated.

The fact is that the wheel rotates due to the engagement of the tooth in the clutch of the drunken bearing. Rotation can occur due to the weakening of the spring pos. 63 and the wear of the tooth profile, both the gear and the clutch.

The malfunction is eliminated by restoring the tooth profile in the combined gear, in a drunk bearing.

The design of the intermediate shaft of the Interskol P600ER perforator is distinguished by the presence of a common shaft pos. 39.

Blade shaft perforator Interskol P600ER

Slipping of the gear wheel pos. 45 on the shaft can occur due to the weakening of the pressure spring pos. 38 and wear of the tooth in the connector pos. 40, which acts as a clutch.

Sometimes a malfunction occurs, which manifests itself in the impossibility of fixing the working body in the keyless chuck.

Interskol perforators are equipped with two types of cartridges: SDS-plus and SDS-max.

Clamping of the shanks of the working tool is provided by their special design.

Failure of the clamping device occurs due to wear of the locking ball.

Repair of the Interskol perforator, and specifically its keyless chuck, consists in replacing the balls and lubricating the drill shanks with special grease. It is recommended to use a specially formulated ointment as a lubricant for the drill shanks.

Interskol perforators are equipped with mode switches of various designs. And this is no accident.

Often, users switch the hammer operation mode without stopping the tool. And this is the main reason for the breakdown of the mode switch in rotary hammers.

The mode switch of Interskol perforators includes a different number of parts.

The mode switch of the Interskol P-18 / 450ER perforator is distinguished by a certain complexity.

Punch mode switch Interskol P-18 / 450ER

Mode switching is carried out by transferring the cam coupling half pos. 44 out of engagement with the pinion shaft pos. 43.

The translation is carried out using the mode switching bracket, pos. 52, the switch bar, pos. 55, and the switch knob, pos. 16.

Malfunctions are manifested in the impossibility of transferring the switch to the desired mode.

The malfunction is eliminated by replacing the spring pos. 48, aligning or replacing bent parts.

The complex design of the mode switch of the Interskol P-18 / 450ER perforator forced the developers to design a new scheme and implement it in the Interskol P-26 / 800ER perforator.

Mode switch perforator Interskol P-26 / 800ER

Modes are switched by means of the switch leash, pos. 55, the spring, pos. 56, and the switch knob, pos. 28.

The design uses the smallest number of parts, which increases the reliability and performance of the Interskol P-28 / 800ER perforator.

In the perforator Interskol P600ER, a slightly different design of the mode switch is used.

Mode switch perforator Interskol P-600ER

Modes are switched by removing the clutch (pos. 40) from the rolling bearing (pos. 41).

The electrical part of Interskol rock drills is highly reliable and practically does not cause trouble for the user.

The main thing is to timely monitor the wear of the carbon electric brushes.

You should be aware that when the carbon electric brushes are worn down to a length of less than 8 mm, the brushes must be replaced.

Replacing carbon brushes is not difficult and can be done by any user.

The cover of the hand of the case is removed, the brush holder is released in those designs in which the electric brushes are provided and taken out.

For example, consider replacing the electric brushes in the Interskol P-30 / 900ER perforator.

Carbon brushes pos. 72 are installed in the brush holder pos. 73. to get the brushes, you need to remove the handle-cover pos. 78. turn the brush holder 45 degrees and remove it. By releasing the springs of pos. 71, you can easily get out the carbon brushes.

The stator pos.66, the rotor pos.62 fail very rarely.

For those who wish to repair the stator or rotor with their own hands, the answer is here.

The rest of the parts, such as the buttons for turning off position 74 of the tool, capacitors of position 75, chokes of position 76 fail very rarely and their replacement does not cause any particular difficulties.

We examined the main malfunctions of Interskol perforators. If you have materials about other malfunctions, write to us.
Conclusions:

repair of the Interskol perforator is not a difficult task and can be performed by any user who is familiar with the instructions for disassembly and assembly;
timely replacement of O-rings prevents the appearance of the main number of incorrigibles;
timely replaced carbon brushes allow to operate Interskol perforators almost indefinitely

Anyone who has ever had to work with a hammer drill knows how difficult its operating conditions are. That is why do-it-yourself punch repair is such a popular request on the Internet. And today we will tell you absolutely everything regarding the repair of this tool.Undoubtedly, the owners of such expensive equipment want their devices to be of high quality, to do their job 100%. First of all, correct use of the tool will save you from serious damage, which we will talk about a little later. And, of course, the device was repaired on time. At the same time, any small failure should already become a cause for concern and preparation for repair.So, such "beacons" can be:

Unstable work of the punch in the working mode;

The appearance of strange sounds when turning on the punch;

The smell of burning;

The hammer drill does not hammer, although there is no apparent reason for this.

As soon as something like this happened to your equipment, then it's time to repair. Like any similar work, it requires care, understanding the cause of the breakdown and knowledge of how to cope with it. And your very first step in repairing is disassembling the tool into its components. For many, even this stage causes difficulties, and therefore it is necessary to know everything down to the nuances - how, what and why! Image - Perforator interskol DIY repair

Just imagine that your tool suddenly stops working or you urgently need to replace any defective part. The easiest way is to take the hammer drill to a service center for repair, but this takes time, which means it will stop your work for a while. But if you know how the device is disassembled, it will be much easier for you to carry out the rest of the work. In addition, this will lead to significant cost savings, because there will be no need to spend money on paying for the services of repair centers.Instructions for parsing the tool:

We start work, starting from the upper unit: first, the rubber tip is removed, then the washer, the spring, the ball finishes working.

After you have removed the ball, we unscrew the screws that hold the case, remove the cover on the handle, if available, and lastly disconnect the stator wires.

We remove the brush holder.

The next step is to separate the gearbox and housing until a gap forms. It is through it that we will retrieve the switch.

After that, the punch body is placed vertically, with the help of a vise, it is fixed, and all its parts are carefully removed from the device.

Whatever breakdown awaits you, clean the case - sometimes it is dirt and dust that prevent the device from working normally.

DIY punch repair photo

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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, 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.