How to repair the impact mechanism of the perforator Makita 2450 and 2470

Even very reliable Makita perforators with time break.
Any breakdown is eliminated, you only need to have direct hands and perseverance.
In addition to electrical faults, perforators are also susceptible to mechanical failure.
The operation of rock drills with solid materials in a dusty environment shortens the service life and requires user intervention to perform preventive maintenance.

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

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

The Makita 2450 and 2470 can be repaired with a user who has initial locksmith skills and is familiar with electrical safety requirements.

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

Dismantling the mechanical part of the perforator Makita 2470

To get to the mechanical part of the puncher, you need to remove or disassemble the chuck.

Disassembling the quick release
cartridge Install the punch gun on the back cover of the case on the surface of the table covered with a clean cloth or paper. Using a pair of tweezers or a screwdriver, remove the rubber tip 35, pos.1.

Carefully release the ring spring pos. 2, the clutch cover pos. 3, the steel ring pos. You will get to the steel ball with a diameter of 7 mm pos.20.

It is now possible to remove the body of the mechanical part
It is black.
Use a screwdriver to unscrew the four screws at the end of the housing.

With your right hand in the black case, press your thumb against the end of the shaft, from which the cartridge was disassembled. The plastic housing can easily be removed.

Next, remove the gear shaft.

In order to disconnect the mechanical part from the electrical part, it is necessary to remove the electrobrushes first.
Remember! In the lower part of the housing, the rotor is held by electric brushes, which must be removed.

After verifying that the electrobrushes are disconnected from the rotor blades, use a screwdriver to punch a metal puncher body on the border of the green plastic casing.

Now we turn to the detachment of the rotor from the mechanical part of the perforated .The rotor is held in the mechanical part due to the helical gears of the reducer.
If you take the rotor body in one hand and into the other body of the mechanical part and pull it in different directions, shaking, you disconnect the two knots.

Get this knot in the old grease.

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

Here is a mountain of clean details.

And now carefully look through the details, immediately throw out rubber rings, picking up new ones.
Replace defective parts with new ones.

Mechanical malfunctioning of makita 2450 and makita 2470

guns The frequent mechanical failures of the Makita perforators include:

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• destruction of a quick-release chuck;
• bearing failure;
• breakdown of the impactor;
• wear of the gun barrel;
• wear of the rubber striker and striker;
• breakage of gears.

The repair of the puncher cartridge is made to replace the anther and rubber ring, as well as the conical spring and the steel ball, which clamps the working tool( drill).Does this indicate that the working tool?namely, the drill, is not properly retained in the cartridge.

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

General view and arrangement of the cartridge of the Makita perforator is shown in the photo below.

Repairing the makita 2450 perforator cartridge with your own hands is easy. The cartridge should be disassembled, freed from the old lubricant, discarded rubber parts, replaced with defective ones.

More complex faults require knowledge of the mechanical device of the Makita 2450 perforator.

Having determined the nature of the malfunction of the Makita perforator, proceed to disassemble the mechanical part called the reducer.

Disassemble the mechanical part according to the attached video.
Remove it from the old grease.
Inspect all parts, their integrity, wear level. All rubber products for any dismantling require replacement.

Consider the repair of the gun barrel. Let us analyze the mechanism completely.
Video disassembly, lubrication and assembly of the perforator Makita

Repair parts of the barrel puncher Makita 2450

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

The next step is to remove the rotor from the removed gear. The rotor is detached from the mechanism simply by pulling it out, because it is supported by the friction of two helical gears.

This is a dirty node.

Now you need to separate the shock shaft.

Most often wear rubber rings, pins pos.24, compressor spring pos.18.and cylinder parts.

This is how the parts of the barrel wear out and break down when the tool is misused.

Consider the most difficult malfunction - the failure of the impactor.
Characteristic signs of the failure of the impact mechanism is the absence of impact and the unpleasant noise of a working perforator in the "Strike" mode.

Such a malfunction is typical for those guns, which in the process of exploitation were strongly pressed against the work surface.
Having disassembled the gearbox, remove debris and pieces of foreign objects. We find the defective part and clean everything from the old grease.

Very often the piercing posture 24, 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. The parts are ready for assembly. But about this in the next article.

Good luck to you!