How To Assemble The Makita 2470 Rotary Hammer

19th March 2021

How to repair a Makita rotary hammer

Hammer drills are hammer drilling devices designed for drilling and chiselling holes in extra strong materials.
The hammer drill implements two ideas: the working tool rotates and simultaneously moves in the longitudinal direction, creating an impact impulse.

Rock drills always work in extreme conditions.
The duration of the hammer drill depends not only on the correct operating conditions, but also on the reliability of the parts included in the product.
But no matter how hard you try, over time, punches start to fail.

To properly repair a punch, you need to familiarize yourself with its device. Do-it-yourself repair of the Makita 2470 and 2450 hammer drill can be done by a person who has the skills of a locksmith and knows the basics of electrical engineering.
Remember! Observe safety rules and unplug the punch when disassembling.

Hammer drills Makita 2450 and 2470 are assembled in almost the same pattern and from the same parts. Repairing them is no different.
For ease of repair, below is an assembly diagram and parts catalog for Makita rotary hammers.

The scheme of the Makita 2450 and 2470 hammer drill consists of a mechanical and electrical part.

The mechanical part provides the transmission of torque to the drill bit, while simultaneously creating a translational movement that creates an impact.
The mechanical part consists of a rotation drive and an impact mechanism.

The electrical circuit of the Makita hammer drill provides the conversion of electrical energy into kinetic energy through the rotation of the rotor. The electrical part includes an electric motor, a power button with a speed controller, a reverse switch, connecting wires.
The main malfunctions of the punch makita
Rotary hammer malfunctions are divided into electrical and mechanical.

In this article, we will consider all the malfunctions of the electrical part of the Makita 2470 and 2450 rotary hammers and how to fix them:

Electrical malfunctions of rotary hammers Makita 2450 and Makita 2470
Electrical faults are manifested in the fact that when the hammer drill is connected to the voltage network, the tool does not turn on.
The connection diagram of the Makita hammer drill to the network is simple. The electrical diagram of the Makita 2450 hammer drill is a serial connection of the electric motor, start button and wires. The scheme of the Makita 2470 rotary hammer is similar.

Through the connecting cord, pos. 72, the supply voltage of 220 V is supplied through the switch, pos. 68, and the electric brushes through the brush holder, pos. 66, to the lamellae of the rotor of the electric motor, pos. 54. and through the contacts of the reverse switch, pos. 60, to the stator winding, pos. 59.
The most common malfunction is the lack of contacts in the connections.

Procedure for determining electrical faults

Determination of the integrity of the electrical part of the Makita rotary hammer. In order to repair the Makita 2450 or Makita 2470 hammer drill with your own hands, you need to arm yourself with devices and tools. Any tester, screwdriver set, wrenches, hammer, wooden guide will do. It’s good to have a screwdriver with a built-in phase indicator.

You need to take a tester, connect to the ends of the punch plug and press the punch switch. If the tester shows some resistance, then the power circuit of the puncher is intact. If the tester shows infinity, then the continuity of the circuit is broken and you need to remove the back cover to check the connecting cable and electric brushes of the puncher.

The back cover (usually black) of the punch is easy to remove, you just need to unscrew three screws with a screwdriver or screwdriver.

Remove the cover and use a screwdriver to disconnect the ends of the wires from the electric brushes.
Using a tester or a home-made device, popularly called “arkashka”, determine the integrity of the lead wires and the correct operation of the switch.

A few words about a simple control device called “arkashka”. The device consists of an LED or a light bulb from a flashlight, a penlight battery and two pieces of wire. The entire electrical circuit of the control device is a series-connected parts. Connect the battery to one end of the LED or light bulb, and connect the wires to the free ends of the LED and battery. You will have a universal device for checking the continuity of electrical circuits.

Typical malfunctions of the Makita 2450 and 2470 rotary hammer
Frequent faults in the electrical part of the Makita 2450 and Makita 2470 rotary hammer:

break of the supply cable at the point of entry into the perforator;
failure of the button of the TG813TLB-1 switch, art. 650508-0, pos. 68.;
wear of electric carbon brushes SV-419, art.191962-4, pos.65;
wear of the reverse switch contacts;
wear of the rotor bearings: bearing 609LLU, item 210060-6, item 51; bearing 607LLU, item 211021-9, item 56;
short circuit of the rotor 220-240 V, art.515668-8, pos. 54;
failure of the stator winding 220-240 V for HR2450, art. 633488-5, pos. 59.

The switch TG813TLB-1, art.650508-0 is used as a start button; pos. 68.

Replacement of brushes is carried out when they are completely abraded or poor contact. This malfunction is detected by strong heating of the points of the places where the electric brushes are installed.

Failure to turn on the hammer drill may be caused by abrasion of the contacts on the reverse switch.
Eliminating such a malfunction is very simple.

Makita Rotary Hammer Reverse Switch Repair

To repair the reverse switch, the rear cover must be detached. Disconnect the wires carefully from the button. Inspect the switch carefully.

Further disassembly consists in removing the brush holder, having previously released the brushes themselves.
By removing the brush holder, you will reach the contacts of the reverse switch.
Determine its condition, replace contacts if necessary.

Another common electrical fault is poor contact between the stator and the lower contacts of the reversing switch.

Repair of the contact between the stator and the reversing switch

To remove the stator, it is necessary to disconnect the gear housing (black) from the stator housing (green).

Remember! In the mechanical part of the rotor, the bearing is pressed by a special ring. When disassembling, do not lose it.

The stator is located in the green housing. Looking into the middle, you will see two self-tapping screws 4 × 60, ref. 266334-3, item 57, securing the stator to the housing. Unscrew them, remove the plastic stator protection for HR2450, art.419201-3, pos.58., Release the stator.
When you take out the stator, you will see the contacts on the stator and the reversing switch panel. Carefully clean the contacts with emery paper, thinner or alcohol.
Before assembly, bend the contacts so that they fit snugly into each other. Lubricate the contacts with a thin layer of petroleum jelly.

The electrical part of the rock drill is assembled in the reverse order.

Setting the mode selector lever

The mode switch is designed to transfer the clutch, pos. 39, to various positions and transfer the translational motion to the percussion shaft through the rolling bearing, pos. 41, to the cylinder, pos. 32.

Makita 2450 Punch Mode Switch Lever Assembly

On the axis of the inner case it is necessary to put the mode switch lever pos.82, from above the pressure spring pos.88, crush it with a flat washer pos.87. Install the circlip, pos. 86. and fix.
The retaining ring must be carefully fixed. Turning the intermediate shaft, it is necessary to carefully check the correct operation and free movement of the cylinder in the housing. This must be done now so that it does not become clear at the end of the assembly that the assembly is assembled incorrectly.

Now grease all parts of the mechanical block with the recommended grease. Here is an example of how to properly lubricate rotating surfaces and here is another example of generous lubrication of a mechanical block.

You can’t spoil porridge with butter

So it is also allowed to apply lubricant. You can’t spoil porridge with butter!

The lubricated mechanical block must be closed with a plastic housing pos. 14 black.
Place the body on top of the assembly and press the body down until the assembly is fully seated in it.
Backwardness, insert four bolts (pos. 10) into the body and tighten. Now it is the turn of the connection to the mechanical part of the electric motor rotor.

Installing the rotor

The helical gear of the rotor is tightly inserted into the housing of the mechanical block and pressed.

It remains to insert four self-tapping screws m4 × 60 pos. 57. and screw them into the body of the electrical unit.

How to lubricate and assemble the Makita 2450 and 2470 rotary hammer correctly

The assembly of any mechanism should be started after careful preparation. It is necessary to prepare not only the parts, but also the tools, place, lubricant.

Of the tools, you can not do without pliers, screwdrivers, a hammer, a brush for applying lubricant.

And what is the assembly diagram of the Makita 2450 and 2470 rotary hammer?

Do-it-yourself assembly of a Makita rotary hammer can only be performed if the attached instructions are followed.

The task of the assembly process is to replace faulty parts with usable ones and ensure the interchangeability and operability of the tool.

Assembling the intermediate shaft assembly

To assemble the intermediate shaft, it is necessary to put the rolling bearing (pos. 41) on the shaft (pos. 40) with its teeth to the splines of the shaft, and put the coupling (pos. 39) on the splines of the shaft.

Transmission of translational motion

On the opposite side of the shaft, a helical gear 26 pos. 42 is put on, a flat washer 8 pos. 45, a bearing 608zz pos. 46 and a circlip 8 pos. 47.
The intermediate shaft is assembled.

The order of assembling the punch Makita 2450

Assembling the hammer shaft

First, you need to lubricate the inside of the cylinder (pos. 32) and insert the striker (pos. 30) into it.

It remains in the inner body of pos. 49 to put the lubricated barrel assembly in position 21 in place, putting it on the lubricated cylinder of pos. 32.
It is recommended to use a special grease developed for Makita rotary hammers as lubricants.
There are several types of lubricants: Makita P-08361 and Makita 183477-5 SDS-PLUS.
Makita Grease 183477-5 SDS-PLUS is recommended for the gearbox. Makita grease 196804-7 is used for drill shanks.

Lubricants vary in color, but have exactly the same characteristics.
And what other lubricants are used in the Makita 2450 and 2470 hammer drill?

And here we have an assembled mechanical block.

Assembling the striking mechanism

And how to assemble the hammer hammer mechanism Makita?
The percussion mechanism is assembled from two units: a barrel shaft with a spur gear and an intermediate shaft with a rolling bearing. A). A spur gear, pos. 19, is put on the barrel, pos. 21, and pressed by a compression spring, pos. 18.
To fix the spring, it is pressed with a washer 30 pos. 17 and secured with a retaining ring 28 pos.16.B). To assemble the striker, you need to put the ring 9, pos. 25 on the shaft of the striker, pull the rubber ring, pos. 26, press down with the metal ring, pos. 27.

Now we go to the opposite side of the barrel, pos. 21. On the other hand, the inner surface of the barrel must be lubricated with grease and inserted inside the assembled drummer, pos. 24.

Assembling the intermediate shaft and piston

Assembling the reducer assembly

The assembly of the gear unit is carried out on the inner casing pos. 49.

How to fix Makita hr2470 rotary hammer disassemble and problem find

Inner body

By the way, there are cases when the axles pop out of the inner aluminum housing. Both axles are pressed into the housing.

The assembled intermediate shaft is inserted into the housing of pos. 49, the rolling bearing lever of which should fall into the hole of the cylinder hinge. In this case, the rolling bearing lever pos. 41 of the intermediate shaft must fall into the cylinder hinge, pos. 32, and the lower intermediate shaft bearing into the housing in the housing. This procedure is usually performed by rocking the structure until the parts are completely in the indicated places.

Impact shaft assembly

First, you need to lubricate the inside of the cylinder (pos. 32) and insert the striker (pos. 30) into it.

Lubricants vary in color, but have exactly the same characteristics.
And what other lubricants are used in the Makita 2450 and 2470 hammer drill?

And here we have an assembled mechanical block.
Video of general disassembly and assembly of the Makita 2450 rotary hammer

Chinim Makita HR 2450 \ Replacing the metal case \ Assembling the Makita HR2450 rotary hammer

Check its performance by rotating the intermediate shaft and controlling the movement of the piston in the percussion mechanism. All!

Now grease all parts of the mechanical block with the recommended grease. Here is an example of how to apply lubricant correctly to rotating surfaces.

And here is another example of generous lubrication of the mechanical block.

So it is also allowed to apply lubricant. You can’t spoil porridge with butter!

How to repair disassemble Makita HR2450 rotary hammer drill

The lubricated mechanical block must be closed with a plastic housing pos. 14 black.
Place the body on top of the assembly and press the body down until the assembly is fully seated in it.
Backwardness insert four bolts pos. 10 into the body and tighten.

Now it’s the turn to connect to the mechanical part of the rotor of the electric motor.

The helical gear of the rotor is tightly inserted into the housing of the mechanical block and pressed.

It remains to insert four self-tapping screws m4 × 60 pos. 57. and screw them into the body of the electrical unit.

Setting the mode selector lever

Makita 2450 Punch Mode Switch Lever Assembly

On the axis of the inner case it is necessary to put the mode switch lever pos.82, from above the pressure spring pos.88, crush it with a flat washer pos.87. Install the circlip, pos. 86. and fix.

The retaining ring must be carefully fixed.
Turning the intermediate shaft, it is necessary to carefully check the correct operation and free movement of the cylinder in the housing. This must be done now so that it does not become clear at the end of the assembly that the assembly is assembled incorrectly.

The order of assembling the punch Makita 2450

Assembling the striking mechanism
And how to assemble the hammer mechanism of the Makita rotary hammer?
The impact mechanism is assembled from two units: a barrel shaft with a spur gear and an intermediate shaft with a rolling bearing.

AND). A spur gear, pos. 19, is put on the barrel, pos. 21, and pressed by a compression spring, pos. 18.
To fix the spring, it is pressed with a washer 30, pos. 17 and secured with a retaining ring 28, pos. 16.

B). To assemble the striker, you need to put the ring 9, pos. 25 on the shaft of the striker, pull the rubber ring, pos. 26, press down with the metal ring, pos. 27.

Now we go to the opposite side of the barrel, pos. 21. On the other hand, the inner surface of the barrel must be lubricated with grease and inserted inside the assembled drummer pos24.

Assembling the intermediate shaft assembly

On the opposite side of the shaft, a helical gear 26 pos. 42 is put on, a flat washer 8 pos. 45, a bearing 608zz pos. 46 and a circlip 8 pos. 47.
The intermediate shaft is assembled.

Assembling the reducer assembly
The assembly of the reducer block is carried out on the inner casing pos. 49.

By the way, there are cases when the axles pop out of the inner aluminum housing. Both axles are pressed into the housing.

The assembled intermediate shaft is inserted into the housing of pos. 49, the rolling bearing lever of which must fall into the hole of the cylinder hinge.

In this case, the lever of the rolling bearing, pos. 41, of the intermediate shaft must fall into the joint of the cylinder, pos. 32, and the lower bearing of the intermediate shaft, into the seat in the housing. This procedure is usually performed by rocking the structure until the parts are completely in the indicated places.

How to Lubricate and Assemble Makita Rotary Hammer 2450 and 2470

Home »How to Lubricate and Assemble Makita Rotary Hammer 2450 and 2470

How to Lubricate and Assemble Makita Rotary Hammer 2450 and 2470

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The assembly of any mechanism should be started after careful preparation. It is necessary to prepare not only the parts, but also the tools, place, lubricant.

Of the tools, you can not do without pliers, screwdrivers, a hammer, a brush for applying lubricant.

The order of assembling the punch Makita 2450
Setting the mode selector lever
Impact shaft assembly
Installation of electric brushes

And what is the assembly diagram of the Makita 2450 and 2470 rotary hammer?

Do-it-yourself assembly of a Makita rotary hammer can only be performed if the attached instructions are followed.

The task of the assembly process is to replace faulty parts with usable ones and ensure the interchangeability and operability of the tool.

Installation of electric brushes

Remove dirt from the grooves of the brush holder and reinstall the brushes, securing them with latches.

Now is the time to test the performance of the hammer drill. Connect the punch plug to the socket, turn on the punch for a while in the “drilling” mode. After making sure that the tool is working, turn it off. Set the mode switch to the “shock” position. Do not insert the tool.
Check the operation of the punch in this position. At the same time, you checked the operation of the mode switch.

It remains to check the layout of the speed control button, make sure that the contact connections are reliable, and you can start installing the cover plate.

The cover is secured with three Mx4 self-tapping screws of different lengths.

Connect the hammer drill to a 220 V network and check in all modes.
Hammer drill Makita 2450 or 2470 is assembled and working properly!

For a long operation of the Bosch rotary hammer, any regular and timely maintenance is necessary, the use of high-quality lubricants.

Interskol angle grinders (angle grinder) are very reliable and durable. They are distinguished by good performance and high reliability. But,…

The famous Japanese brand Makita enjoys well-deserved popularity among consumers around the world. All Makita products are distinguished by their high quality.

Do-it-yourself Makita 2470 punch repair video

Today, developers offer buyers hundreds of different apartments and houses. Often, residents want to slightly change their parameters, making housing more convenient and comfortable. Makita hammer drills allow you to carry out repair work efficiently and quickly. Prefabricated parts and good build quality will increase the lifespan and help avoid interruptions during the restoration process. The article will give an idea of the main advantages of the products of this manufacturer.

To install the mode switch in the case, you need to perform some actions:
insert the switch to the “drilling” position into the seat until it clicks;
move the switch counterclockwise to the “impact” position;
move the switch with a click counterclockwise to the “drilling” position;
insert the spring and the red button;
insert the overlay from above until it engages.
Mode switch assembled.

At the second stage, you should disassemble the quick-release chuck and repair the drill chuck with your own hands. By the way, the cartridge requires disassembly only for the Makita 2470 models. The cartridge device is quite simple, and any person who has a little bit of locksmith skills can handle its repair.

The procedure for disassembling the shaft of the barrel of the percussion mechanism

To disassemble the shaft of the percussion mechanism, it is necessary to pull it out of the inner case.

From the shaft it is necessary to pull out the cylinder, pos. 32, inserted into the inner cavity of the shaft.

The cylinder is very easy to disassemble:

you need

2. Knock out the hinge of the piston poz.34;

3. Two flat washers are removed poz.33,35.

To disassemble the shaft itself, pos. 21 of the percussion mechanism, it is necessary to remove from the side of the cartridge installation shaft:

– ring spring 28 pos.16;
– washer 30 pos. 17;
– compression spring 31 pos. 18;
– spur gear 51 pos. 19;
– steel ball 7.0 item 20.

And from the side of the inner cavity of the shaft it is necessary to remove:

– ring spring 28 pos. 29;
– rubber ring pos. 28;
– metal ring pos. 27;
– rubber ring 15 pos. 26;
– ring 9 pos. 25;
– flat metal washer 28 pos. 22.

Mechanical malfunctions of the Makita 2450 and Makita 2470 rotary hammers

Common mechanical failures of Makita rock drills include:

destruction of the quick-release chuck;
failure of bearings;
breakage of the striking mechanism;
drill barrel wear;
wear of striker and striker rubber bands;
breakage of gears.

The hammer drill chuck is repaired to replace the boot and rubber ring, as well as the conical spring and the steel ball, which secures the working tool (drill). This is indicated by what is a working tool? namely the drill, does not hold well in the chuck.

The main reason is the wear of the steel ball 7.0, item 20, art. 216022-2. Ball wear occurs from contamination of the bore of the cartridge due to the ingress of dust and dirt.

The general view and device of the Makita hammer drill chuck is shown in the photo below.

Do-it-yourself repair of the makita 2450 perforator cartridge is easy. The cartridge must be disassembled, freed from old grease, discarded rubber parts, replaced defective.

complex malfunctions require knowledge of the mechanical part of the Makita 2450 rotary hammer.

Having determined the nature of the malfunction of the Makita hammer drill, proceed to disassemble the mechanical part, called the gearbox.

Disassemble the mechanical part according to the attached video.
Free her from the old grease.
Carefully inspect all parts, their integrity, level of wear. All rubber products require replacement during any disassembly.

Consider repairing the barrel of a rock drill. Let’s analyze the mechanism completely.
Video of disassembly, lubrication and assembly of the Makita rotary hammer

Bulkhead rotary hammer Makita 2450

Repair of parts of the barrel of the Makita 2450 hammer drill

Remember! In the lower part of the housing, the rotor is held by electric brushes, which must be removed.

The next step is to disconnect the rotor from the removed mechanism. The rotor is simply disconnected from the mechanism by pulling it out, since it is held by the friction of two helical gears.

It turned out to be such a dirty knot.

Now it is necessary to separate the shaft of the percussion mechanism.

Most often, the rubber rings wear out, the firing pin pos. 24, compressor spring pos. 18. and cylinder parts.

This is how barrel parts wear out and collapse when the tool is misused.

Consider the most difficult malfunction. failure of the striking mechanism.
The characteristic signs of a breakdown of the percussion mechanism are the absence of an impact and the unpleasant noise of a working perforator in the “Impact” mode.

Minute vandalism) (21) Rotary hammer Makita HR 2450 Strong recoil on impact mode

Such a malfunction is typical for those rotary hammers that, during operation, were strongly pressed against the surface to be treated.
Having disassembled the gearbox, we remove debris and pieces of foreign objects. We find the faulty part and clean everything from the old grease.

The striker, pos. 24, art. 324396-8, part of the barrel.

metal ring pos. 27. art. 324216-6.

Discard damaged parts, replace with new ones, cover with a thin layer of grease. The parts are ready for assembly. But more on that in the next article.

Mechanical malfunctions of the Makita 2450 and Makita 2470 rotary hammers

Common mechanical failures of Makita rock drills include:

destruction of the quick-release chuck;
failure of bearings;
breakage of the striking mechanism;
drill barrel wear;
wear of striker and striker rubber bands;
breakage of gears.

The main reason is the wear of the steel ball 7.0, item 20, art. 216022-2. Ball wear occurs from contamination of the bore of the cartridge due to the ingress of dust and dirt.

General view and device of the Makita hammer drill chuck is shown in the photo below.

Do-it-yourself repair of the makita 2450 perforator cartridge is easy. The cartridge must be disassembled, freed from old grease, discarded rubber parts, replaced defective.

complex malfunctions require knowledge of the mechanical part of the Makita 2450 rotary hammer.

Having determined the nature of the malfunction of the Makita hammer drill, proceed to disassemble the mechanical part, called the gearbox.

Disassemble the mechanical part according to the attached video.
Free her from old grease.
Carefully inspect all parts, their integrity, level of wear. All rubber products require replacement during any disassembly.

Consider repairing the barrel of a rock drill. Let’s analyze the mechanism completely.
Video of disassembly, lubrication and assembly of the Makita rotary hammer

Bulkhead rotary hammer Makita 2450

Punch disassembly procedure

Place the rotary hammer on a clean surface.

When disassembling the mechanical part of the Makita 2450 or Makita 2470 hammer drill, you should always remove the mode switch knob.

At the beginning of work, the knob is set to the “Impact” mode (extreme right position clockwise).
On the handle, using a screwdriver, the latch is picked up and removed.
After removing the latch, the handle is moved to the extreme left position, in the “Drilling” mode.

The handle gripped by the fingers is removed from the grooves of the case.

Sources:

http://pret-a-parket.ru/kak-smazat-i-sobrat-perforator-makita-2450-i-2470-pravilno/
http://www.sibear.ru/information/kak-smazat-i-sobrat-perforator-makita-2450-i-2470.htm
http://mirglobo.ru/remont/makita-2470-remont-detalirovka-vzryv-sxema-perforatora-makita-makita-hr2470-v-internet-magazine-zip4tools-ru.html

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