Disassembly of the Makita 2470 Hammer Video

Even very reliable Makita rotary hammers break down over time.
Any breakdown is eliminated, you only need to have straight arms and perseverance.
In addition to electrical malfunctions, rotary hammers are also subject to mechanical damage.
The work of rock drills with solid materials in a dusty environment shortens the life of the machine and requires user intervention to perform preventive maintenance.

Repair of the mechanical part of the Makita 2450 and 2470 puncher

Any repair of the tool begins with the determination of the nature of the malfunction and disassembly.

A Makita 2450 and 2470 rotary hammer can be repaired by a user with basic locksmithing skills and knowledge of electrical safety requirements.

This article discusses the mechanical part of the Makita puncher, the main malfunctions and how to solve them.

Disassembly of the Makita 2470 Hammer Video

Dismantling the mechanical part of the Makita 2470 rotary hammer

To get to the mechanical part of the punch, you need to remove or disassemble the cartridge.

Dismantling the quick release chuck
Place the hammer drill on the back of the cabinet on the surface of a table covered with a clean cloth or paper. Using tweezers or a screwdriver, remove the rubber tip 35, item 1.

Now you can remove the case of the mechanical part
It is black.
Using a screwdriver, unscrew the four screws at the end of the case.Holding the black case with your right hand, press the end of the shaft from which the cartridge was disassembled with your thumb. The plastic case is easy to remove.

Next, remove the gearbox shaft.

To disconnect the mechanical part from the electric, you must first remove the electric brushes.
Remember! In the lower part of the body, the rotor is held by electric brushes, which must be removed.

After checking that the electric brushes are disconnected from the lamellas of the rotor, use a screwdriver to pry the metal case of the punch at the border of the green plastic case.

Now we proceed to disconnect the rotor from the mechanical part of the punchpa The rotor is held in the mechanical part due to helical gears of the gearbox.
If you take the rotor case in one hand, and the mechanical part in the other case and pull it in different directions, swinging, you will separate these two nodes.

You get such a knot in the old grease.Next, unscrew the two M4 × 12 bolts, pos. 43, using the hexagon, item 2666273-7 with the internal hexagon head.
Pull out the shaft with the intermediate spur gear 10 pos. 80, art.226399-7.
from the inner case pos. 49, art. 153687-8. Clean parts from old grease.

You get such a mountain of clean details.Now carefully review the details, immediately discard the rubber rings, picking up new ones.
Replace defective parts with new ones.

Mechanical makita 2450 and makita 2470 rock drill

Common mechanical problems with Makita rotary hammers include:

Repair of the perforator cartridge is done to replace the anther and rubber ring, as well as the conical spring and the steel ball, which provides clamping of the working tool (drill). What does the working tool indicate? namely, the drill is poorly held in the cartridge.

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

The general view and arrangement of the Makita rotary hammer cartridge is shown in the photo below.

Do-it-yourself makita 2450 rotary hammer cartridge repair is easy to do. The cartridge must be disassembled, freed from old grease, discard rubber parts, replace defective ones.

complex failures require knowledge of the mechanical design of the Makita 2450 rotary hammer.

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

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

Consider repairing a perforator barrel. We will analyze the mechanism completely.
Video disassembly, lubrication and assembly of the Makita rotary hammer

Repair of the mechanical part of the Makita 2450 and 2470 puncher

Any repair of the tool begins with the determination of the nature of the malfunction and disassembly.

A Makita 2450 and 2470 rotary hammer can be repaired by a user with basic locksmithing skills and knowledge of electrical safety requirements.

This article discusses the mechanical part of the Makita puncher, the main malfunctions and how to solve them.

Dismantling the mechanical part of the Makita 2470 rotary hammer

To get to the mechanical part of the punch, you need to remove or disassemble the cartridge.

Dismantling the quick release chuck
Place the hammer drill on the back of the cabinet on the surface of a table covered with a clean cloth or paper. Using tweezers or a screwdriver, remove the rubber tip 35, item 1.

Carefully loosen the annular spring, pos. 2, the clutch cover, pos. 3, the steel ring, pos. 4. You will reach a steel ball with a diameter of 7 mm, pos.20.

Now you can remove the case of the mechanical part
It is black.
Using a screwdriver, unscrew the four screws at the end of the case.

Holding the black case with your right hand, press the end of the shaft from which the cartridge was disassembled with your thumb. The plastic case is easy to remove.

Next, remove the gearbox shaft.

To disconnect the mechanical part from the electric, you must first remove the electric brushes.
Remember! In the lower part of the body, the rotor is held by electric brushes, which must be removed.

After checking that the electric brushes are disconnected from the lamellas of the rotor, use a screwdriver to pry the metal case of the punch at the border of the green plastic case.

Now we proceed to disconnect the rotor from the mechanical part of the punch. The rotor is held in the mechanical part due to helical gears of the gearbox.
If you take the rotor case in one hand, and the mechanical part in the other case and pull it in different directions, swinging, you will separate these two nodes.

You get such a knot in the old grease.

Next, unscrew the two M4 × 12 bolts, pos. 43, using the hexagon, item 2666273-7 with the internal hexagon head.
Pull out the shaft with the intermediate spur gear 10 pos. 80, art.226399-7.
from the inner case pos. 49, art. 153687-8. Clean parts from old grease.

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You get such a mountain of clean details.

Now carefully review the details, immediately discard the rubber rings, picking up new ones.
Replace defective parts with new ones.

Mechanical makita 2450 and makita 2470 rock drill

Common mechanical problems with Makita rotary hammers include:

  • destruction of the quick-release cartridge;
  • bearing failure;
  • breakdown of the shock mechanism;
  • punch barrel wear;
  • wear of rubber strikers and striker;
  • gear breakage.

Repair of the perforator cartridge is done to replace the anther and rubber ring, as well as the conical spring and the steel ball, which provides clamping of the working tool (drill). What does the working tool indicate? namely, the drill is poorly held in the cartridge.

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

The general view and arrangement of the Makita rotary hammer cartridge is shown in the photo below.

Do-it-yourself makita 2450 rotary hammer cartridge repair is easy to do. The cartridge must be disassembled, freed from old grease, discard rubber parts, replace defective ones.

complex failures require knowledge of the mechanical design of the Makita 2450 rotary hammer.

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

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

Consider repairing a perforator barrel. We will analyze the mechanism completely.
Video disassembly, lubrication and assembly of the Makita rotary hammer

Video: Makita 2450 rotary hammer bulkhead

Repair of parts of a shaft of the Makita 2450 puncher

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

At the next stage, the rotor must be disconnected from the removed mechanism. The rotor is disconnected from the mechanism simply by pulling out, because it is held by the friction of two helical gears.

It turned out such a dirty knot.

Now you need to separate the shaft of the percussion mechanism.

Most often, rubber rings, striker poses wear out. 24, compressor spring pos. 18. and cylinder parts.

Here’s how barrel parts wear out and collapse during improper use of the tool.

Consider the most difficult malfunction. failure of the shock mechanism.
The characteristic signs of failure of the impact mechanism is the absence of impact and the unpleasant noise of a working punch in the “Impact” mode.

Video: A moment of vandalism) (21) Makita HR 2450 rotary hammer Strong impact in impact mode

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

Very often the striker pos. 24 is destroyed, art. 324396-8, which is part of the trunk.

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

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

Punch disassembly procedure

Place the hammer drill on a clean surface.

When disassembling the mechanical part of a Makita 2450 or Makita 2470 rotary hammer, you must always remove the mode selector knob.

At the beginning of operation, the handle is set to the “Impact” mode (extreme right position clockwise).

On the handle, using a screwdriver, poke and release the latch.

After removing the latch, the handle is moved to the leftmost position, in the "Drilling" mode.

The handle clamped with fingers is removed from the grooves of the housing.

Video instruction for disassembling the Makita 2450 punch mode selector knob

Video: How to put a mode switch on a Makita HR 2450 rotary hammer

How to set the mode knob
To install the mode switch in the case, you must:
insert the switch into the “drilling” position in the seat slot until it clicks;
turn the switch counterclockwise to the “strike” position;
move the switch with a click counterclockwise to the “drilling” position;
insert the spring and the red button;
insert the cover on top until it locks in place.
The mode switch is assembled.

At the second stage, you should disassemble the quick-detachable cartridge and repair the punch cartridge with your own hands. By the way, the cartridge needs to be disassembled only on models of the Makita 2470. The cartridge device is quite simple, and any person with a little knowledge of locksmithing skills can cope with its repair.

Makita rotary hammer disassembly procedure

Repair of the perforator cartridge begins with the installation of the perforator vertically on the rear housing cover. The hrMakita hammer drill circuit will help you properly disassemble.
Is a Makita 2470 rotary hammer cartridge replacement needed? The answer can be obtained only after a complete disassembly of the cartridge with your own hands.
Using a screwdriver or puller, the boot is removed, the cartridge is released from the retaining ring, clutch cover, metal ring 20 pos. 4. Next, you need to carefully get the ball pos.20, remove the guide washer pos.5 and the conical spring pos.6 that supports it. The cartridge is disassembled.

Video: Disassembly of the Makita 2470 Hammer Video


The diagram below shows the design of the perforator cartridge.

The main malfunctions of the makita 2450 punch, causing defects in the operation of the chuck, are:

  • wear of a protective rubber boot pos.1;
  • relaxation of the retaining ring pos. 2 or its partial wear;
  • ball wear pos.20;
  • loss of elasticity of a conical spring pos.6 or its tension.

Repairing a perforator cartridge is not a complicated procedure and is usually easy to carry out by anyone who can hold a screwdriver in their hands.

If replacing a rubber boot, retaining ring, conical spring is not difficult, then replacing a new ball requires attention. The new ball must have a diameter of 7 mm ± 1 μm.
As lubricants, it is recommended to use a special grease developed for the Makita rotary hammer.
The grease has an index of Makita P-08361, Makita 183477-5 SDS-PLUS 30 g for the gearbox. Makarov 196804-7 grease is recommended for drill shanks.

When assembling the cartridge, install the conical spring with the narrow side facing the punch.
Do not forget, do-it-yourself cartridge repair requires careful attention from the collector.

Assembly procedure for quick release chuck

Assembly is carried out on a clean surface. Parts are pre-washed, dried and greased with a thin layer of recommended grease.

The gearbox shaft is lubricated with Makita 183477-5 SDS-PLUS grease. On the shaft in a certain sequence, all incoming parts of the cartridge are collected.

After installing the conical spring, pos.6, put on the guide washer pos.5 and fix it with the ball pos.20, inserting it into the groove of the gearbox shaft.

It remains to put on the ring pos. 4, the casing of the coupling pos. 3, fix the parts with the locking ring pos. 2. At the last stage, insert the protective tip pos. 1 into the end face of the cartridge
The Makita 2450 rotary hammer cartridge repair is now complete. It remains to check its quality by inserting a drill into the cartridge. With proper assembly, the cartridge holds the drill from spontaneous loss.
Cartridge assembled.

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Disassemble the gearbox

To get to the mechanical part, you will need to remove the plastic case.

The procedure for dismantling the mechanical part of the Makita rotary hammer
The protective black plastic case is first removed. The case is removed after you unscrew the four screws securing the case from the end.
By pushing on the shaft end you squeeze the gearbox out of the housing.

After removing the housing, it is necessary to separate the rotor from the gearbox. A reducer is a general mechanical part.
The rotor is separated from the mechanical part (gear) simply.
With your right hand you need to hold the gearbox, hold the rotor with your left.
Swinging, pull both sides in opposite directions. The rotor is held in the gearbox due to the friction of helical gears.
The main malfunctions of the Makita rotary hammer occur in the mechanical part of the tool.

The most characteristic malfunction for the mechanical part, the failure of the shock mechanism.

Dismantling the hammer
The shock mechanism is assembled on the inner case and consists of a gear shaft and an intermediate shaft.
Rotational motion is transmitted through helical gears to the countershaft.

The gear shaft is a hollow barrel in which the cylinder moves freely.

A small spur gear mounted on an intermediate shaft transmits rotation to a large spur gear of the gearbox shaft in which the percussion mechanism is mounted.
And the translational movements on the gearbox shaft of the shock mechanism are simultaneously transmitted due to the transfer from the rolling bearing of the intermediate shaft to the cylinder moving in the gearbox barrel.

We proceed to disassemble the intermediate shaft.

Dismantling the countershaft

On the shaft pos. 40, a helical gear pos. 42 is mounted, on which rotation is transmitted from the rotor gear, a rolling bearing 608zz pos. 41, which transmits translational motion to the joint pos. 34 of the piston pos. 32.
On the other side of the shaft, a clutch pos.39, spur gear 10 pos.80, compression spring pos.38, snap ring S-7 pos.37, bearing 606zz pos.36
Particular attention should be paid to the condition of the rolling bearings.
The punch has imported bearings. Allowed the installation of domestic bearings.
Bearing 606zz can be replaced with 80016, bearing 609zz is changed to 80019.

We proceed to disassemble the shaft of the shock mechanic

Dismantling the shock shaft

Dismantling the barrel of a Makita 2470 rotary hammer is a simple process using the Makita rotary hammer design.
The shaft is a barrel pos.21, in which the shock mechanism is assembled.
A gear pos.19 is attached to the barrel, which is pressed by the spring pos.18, through the washer pos.17 and fixed by the locking ring pos.16.

The cylinder pos. 32 moves in the barrel, acting on the striker pos24. On the reverse side of the striker is fixed a metal ring pos. 27, transmitting the blow to the drill.
And when do you need to replace the barrel of a punch?

Most often, a metal ring fails.

Drum cylinder

With the disassembly, we figured it out.
We change the parts to serviceable and are preparing to assemble. Learn more about grease and punch assembly.

Read if there are problems with the electric part of the punch.

Punch disassembly procedure

Place the hammer drill on a clean surface.

When disassembling the mechanical part of a Makita 2450 or Makita 2470 rotary hammer, you must always remove the mode selector knob.

At the beginning of operation, the handle is set to the “Impact” mode (extreme right position clockwise).
On the handle, using a screwdriver, poke and release the latch.
After removing the latch, the handle is moved to the leftmost position, in the "Drilling" mode.The handle clamped with fingers is removed from the grooves of the housing.

Video instruction for disassembling the Makita 2450 punch mode selector knob

How to set the mode knob

To install the mode switch in the case, you need to perform some actions:
insert the switch into the “drilling” position in the seat slot until it clicks;
turn the switch counterclockwise to the “strike” position;
move the switch with a click counterclockwise to the “drilling” position;
insert the spring and the red button;
insert the cover on top until it locks in place.
The mode switch is assembled.

At the second stage, you should disassemble the quick-detachable cartridge and repair the punch cartridge with your own hands. By the way, the cartridge needs to be disassembled only on models of the Makita 2470. The cartridge device is quite simple, and any person with a little knowledge of locksmithing skills can cope with its repair.

Makita rotary hammer disassembly procedure

Repair of the perforator cartridge begins with the installation of the perforator vertically on the rear housing cover. The hrMakita hammer drill circuit will help you properly disassemble.
Is a Makita 2470 rotary hammer cartridge replacement needed? The answer can be obtained only after a complete disassembly of the cartridge with your own hands.
Using a screwdriver or puller, the boot is removed, the cartridge is released from the retaining ring, clutch cover, metal ring 20 pos. 4. Next, you need to carefully get the ball pos.20, remove the guide washer pos.5 and the conical spring pos.6 that supports it. The cartridge is disassembled.

The diagram below shows the design of the perforator cartridge.

The main malfunctions of the makita 2450 punch, causing defects in the operation of the chuck, are:

  • wear of a protective rubber boot pos.1;
  • relaxation of the retaining ring pos. 2 or its partial wear;
  • ball wear pos.20;
  • loss of elasticity of a conical spring pos.6 or its tension.

Repairing a perforator cartridge is not a complicated procedure and is usually easy to carry out by anyone who can hold a screwdriver in their hands.

If replacing a rubber boot, retaining ring, conical spring is not difficult, then replacing a new ball requires attention. The new ball must have a diameter of 7 mm ± 1 μm.
As lubricants, it is recommended to use a special grease developed for the Makita rotary hammer.
The grease has an index of Makita P-08361, Makita 183477-5 SDS-PLUS 30 g for the gearbox. Makarov 196804-7 grease is recommended for drill shanks.

When assembling the cartridge, install the conical spring with the narrow side facing the punch.
Do not forget, do-it-yourself cartridge repair requires careful attention from the collector.

Assembly procedure for quick release chuck

Assembly is carried out on a clean surface. Parts are pre-washed, dried and greased with a thin layer of recommended grease.

The gearbox shaft is lubricated with Makita 183477-5 SDS-PLUS grease. On the shaft in a certain sequence, all incoming parts of the cartridge are collected.After installing the conical spring, pos.6, put on the guide washer pos.5 and fix it with the ball pos.20, inserting it into the groove of the gearbox shaft.It remains to put on the ring pos. 4, the casing of the coupling pos. 3, fix the parts with the locking ring pos. 2. At the last stage, insert the protective tip pos. 1 into the end face of the cartridge
The Makita 2450 rotary hammer cartridge repair is now complete. It remains to check its quality by inserting a drill into the cartridge. With proper assembly, the cartridge holds the drill from spontaneous loss.
Cartridge assembled.

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Disassemble the gearbox

To get to the mechanical part, you will need to remove the plastic case.

The procedure for dismantling the mechanical part of the Makita rotary hammer
The protective black plastic case is first removed. The case is removed after you unscrew the four screws securing the case from the end.
By pushing on the shaft end you squeeze the gearbox out of the housing.

After removing the housing, it is necessary to separate the rotor from the gearbox. A reducer is a general mechanical part.
The rotor is separated from the mechanical part (gear) simply.
With your right hand you need to hold the gearbox, hold the rotor with your left.
Swinging, pull both sides in opposite directions. The rotor is held in the gearbox due to the friction of helical gears.
The main malfunctions of the Makita rotary hammer occur in the mechanical part of the tool.

The most characteristic malfunction for the mechanical part, the failure of the shock mechanism.

Dismantling the hammer
The shock mechanism is assembled on the inner case and consists of a gear shaft and an intermediate shaft.
Rotational motion is transmitted through helical gears to the countershaft.

The gear shaft is a hollow barrel in which the cylinder moves freely.

A small spur gear mounted on an intermediate shaft transmits rotation to a large spur gear of the gearbox shaft in which the percussion mechanism is mounted.
And the translational movements on the gearbox shaft of the shock mechanism are simultaneously transmitted due to the transfer from the rolling bearing of the intermediate shaft to the cylinder moving in the gearbox barrel.

We proceed to disassemble the intermediate shaft.

Dismantling the countershaft

On the shaft pos. 40, a helical gear pos. 42 is mounted, on which rotation is transmitted from the rotor gear, a rolling bearing 608zz pos. 41, which transmits translational motion to the joint pos. 34 of the piston pos. 32.
On the other side of the shaft, a clutch pos.39, spur gear 10 pos.80, compression spring pos.38, snap ring S-7 pos.37, bearing 606zz pos.36
Particular attention should be paid to the condition of the rolling bearings.
The punch has imported bearings. Allowed the installation of domestic bearings.
Bearing 606zz can be replaced with 80016, bearing 609zz is changed to 80019.

We proceed to disassemble the shaft of the shock mechanic

Dismantling the shock shaftDismantling the barrel of a Makita 2470 rotary hammer is a simple process using the Makita rotary hammer design.
The shaft is a barrel pos.21, in which the shock mechanism is assembled.
A gear pos.19 is attached to the barrel, which is pressed by the spring pos.18, through the washer pos.17 and fixed by the locking ring pos.16.The cylinder pos. 32 moves in the barrel, acting on the striker pos24. On the reverse side of the striker is fixed a metal ring pos. 27, transmitting the blow to the drill.
And when do you need to replace the barrel of a punch?

Most often, a metal ring fails.StrikerDrum cylinder

With the disassembly, we figured it out.
We change the parts to serviceable and are preparing to assemble. Learn more about grease and punch assembly.

Read if there are problems with the electric part of the punch.

Makita rotary hammer device

Among users, the Makita rotary hammer has established itself as the tool with the greatest functionality. It is durable and does not require special skills for use, is lightweight and comfortable while working.

The design provides a special protective system designed to limit the spread of dust. With timely cleaning, the tool will work efficiently throughout its entire service life.

Makita is widely used in people who prefer to do repairs on their own. The tool is simple to operate, the financial maintenance costs are minimal, inexpensive.

The manufacturer presents the following specifications:

  • Total weight. 2.04 kg
  • SDS system allows you to mount drills
  • You can hammer and drill
  • The system has three modes of operation
  • The largest number of beats per minute. 4500
  • Translational Strength. 2.7 Joules
  • The power supply network is 780 watts.

Why is a Makita puncher undesirable to hammer?

Often the equipment fails, and the drill flies out of the punch. This happens for various reasons. Many users of Makita rotary hammers are faced with the fact that their device does not hit, but drills at the same time. You can fix the breakdown yourself. The most common causes of malfunctions are presented below:

  • Countershaft wear
  • Deformation of clamping units
  • Damage to the connecting rod system
  • Lack of lubrication for proper operation
  • Damage to shock components

Makita rotary hammer: DIY repair

Diagnostic and troubleshooting technology are identical to other devices. To begin with, you should disassemble the tool by removing the case, and then remove obsolete grease and dirt.

Nodes that have stopped working are recommended to be replaced. After that, all the constituent elements of the mechanism are set to their original position.

For correct operation, it is recommended that you carefully examine each repair point. To restore the functionality of the cartridge 2010, the mode switch and the housing, the following steps should be performed:

  • Remove cartridge
  • Remove switch
  • Repair defects in the inside of the case
  • Lubricate and replace worn parts.

How to disassemble a puncher and gearbox?

When disassembling the gearbox, it is recommended to adhere to the following instructions:

  • Install the hammer drill on a hard surface by lifting its barrel up
  • Pull the shell with forward movements, pressing the tool to the table. This position prevents accidental displacement of the constituent elements.

Makita rotary hammer assembly

After the repair is completed, all the removed parts should be returned to their original position. It is recommended that a fresh coat of grease be applied to all necessary parts.

Before assembling, the body is cleaned with kerosene or gasoline. The peeled shell is returned to the place. The mode switch must not be in it.

Circuit diagram Makita HR 2450

The Makita-2450 rotary hammer system consists of many complementary components and a list of spare parts. Among the most significant elements, the features of which should be taken into account during repair work, the following stand out:

  • Ring locking device. It is designed to hold the spherical element fixing the drill. The washer and spring guide it
  • Snap ring It is necessary for the correct removal of the cartridge cover
  • Four screws connect the gearbox and motor, eliminating vibration. The circuit has a large number of rubber components. Often they cause a malfunction.

Descriptions of the mentioned nodes will be enough for a quality repair.

Conclusion

Makita rotary hammers by right are one of the best in the modern market. The 2470 is a bit improved, but that doesn’t make the device durable. Timely repairs will maximize the period of correct operation. This article helps to understand the features of the work of the main nodes. To eliminate the most common types of malfunctions, these materials are enough.