Finding fault rotor and stator punch Makita

Any power tools eventually begin to fail.Faults are divided into mechanical and electrical.From electrical faults are the most common error associated with the refusal of work brushes.In second place: the failure of the armature bearings.Less common faults associated with failure of the stator and rotor.
And how to determine the fault of the stator, rotor punch Makita 2450 and 2070 to replace the brush?And here we will help the circuit diagram of the punch Makita 2450, 2470.

How to repair or replace the brush punch Makita 2450 and 2470

on what needs to be replaced brushes perforator indicates high arcing in the area of ​​the rotor collectorthe smell of burning, the heating of the brush holder.
A new or repaired under the gun a spark brush is evenly fixed length and there is no separation of the sparks in a circle.
wear on bearings, insulation damage to the rotor or stator clearly indicates a spark on the whole range header.The appearance of such points to spark burn-collector plates, failure of the rotor or stator.

Removing electro punch Makita

As a rule, it is recommended to change the brush after 70 ... 120 works of the power.

, they must be accessible to replace carbon brushes poz.65.With
punch necessary to remove the back cover, it is secured by three self-tapping screws.

Disconnect lead wires.Use a screwdriver to lift the latch on the brushes and set them free.

Remember!At long-term operation tool dopusaetsya not decrease the length of the working part of the brush from the nominal 1/3 (about 8mm).
At deterioration of a brush must be replaced either.

way, counterfeiting can also work well if made of the right material, and strictly according to the drawings.

How to make your own brush?

The cheapest electro pick up from other models of power erode to the desired size in the usual file.It is economical but they will last less than the original.Can alternatively fit carbon rod batteries or other elements.

necessary to take the battery and remove it from the central carbon electrode.The electrode is necessary to grind with the help of needle files to the desired size of the old electro. (This introductory information and is not essential for the application)

It is worth noting that the quality of the graphite has a direct impact on the service life and sparking

Making sure that the brushes are worn out, pick up counterparts.

Installation brushes

Before inserting the brush into place, you must clean the brush holders of a deposit.This is done using a rag soaked in solvent.Nagar in the form of particles produced in heavy sparking preferable to remove fine needle files.Cleared brush holders are set in place, they are inserted into the brush and clamped on top snaps.

How to determine the integrity of the stator without disassembling the hammer

To determine the integrity of the stator winding is necessary to ring it, measure winding resistance and insulation resistance.

to measure the resistance of the winding punch Makita need to connect one end of the tester to the release of the brush holder, and the other on one end of the plug.If the device does not show anything, and change the other end plugs.If the resistance is infinite, in the stator broken and requires replacement or repair.Do not forget, without schematic diagrams punch Makita 2450,2470 you can not do.

If it shows any resistance, it is important to accurately measure its value.Typically, the resistance of the stator winding perforator Makita 2450 at + 20 ° C is in the range of 25 ohms.

more detail to understand why there is a spark of the armature collector and which brush is best?It will help to understand the video, after video review important advice on the selection of brushes

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Removing the stator punch Makita 2450 and 2470 for an accurate diagnosis and repair

To remove the stator poz.59, it is necessary to remove the brushes, remove the four screws holding the cover of the mechanical unit.They twist in the end caps.
Pull the black body and green in different directions you free housing with the stator.The stator is fixed in a green body.

To remove it, you must remove the plastic gasket poz.58 and knock on the housing end wooden mallet or a bar.Stator himself will pop out, will it pull out, blow the final check.

If you have a device for short-circuit, it is possible to immediately check the stator short-circuit.The device is called IR-32.
To verify the stator windings
For accurate test, disconnect the two stator windings from each other on the circuit.Check the resistance of each winding, they should be exactly the same.When the difference of resistance, with less resistance winding likely has interturn fault.

stator Checking punch Makita 2470 and 2450 with his own hands
Diagnostics anchors the stator device fault and homebrew twig

How to check the validity of the rotor rotary hammer Makita

Check rotor shelf in punch Makita begin its dismantlingfrom the housing.
But first it is necessary to carry out external investigations.If the rotor of a spark from the brushes at the collector includes a collector weight if in the process of punch does not develop momentum and has dropped power, this is the first sign of failure of the rotor.

How to get the rotor
body to get out of the rotor housing, it is necessary to divide the black and green body as in the case with the dismantling of the stator.

disconnected stator housing, take the gear case (black) in the right hand, and the rotor to the left and pull in different directions until they are completely disconnected.The rotor is held in the gear by friction bevel gears.

Carefully inspect the rotor collector.It should be no traces of scratches from brush.Slats collector must be clean.

To check the integrity of the reservoir is necessary to use the device for the detection of a short circuit.Continuity test circuit is most easily performed in accordance with circuit diagram punch Makita 2470,2450.Incidentally, such a device can make and yourself, if you know how to communicate with a soldering iron.

If you are convinced of the failure of the rotor, it is possible to install a new, or you can try to recover the failed.

Installation and assembly of the new rotor

rotor replacement does not require special skills and can be performed by any user.

rotor is inserted into the mechanical unit spur gear until snug.

Remember!It is important to establish poz.56 bearing and rubber ring 10 poz.77.
The punch Makita 2450 on the rotor side bearing reservoir is used 607LLB poz.56 or domestic analogue 80017, and by the impeller installed bearing poz.53 609LLU poz.51 or analog 80019.

installing the rotor by closing its case, put in place and test the electro punch.

All!You coped with a difficult task.Punch works.