Makita Drills - Page 9 - Recent Questions, Troubleshooting & Support

If you are ABSOLUTELY certain that the batteries are good then the only other culprit has to be the switch that feeds power to brushless motor. Also check battery contacts for corrosion.

Is there a Deep discharge protection connector on your powertool ???? The thirth small contact in the battery connector or only 2 contacts ? If not then its an advise it must be modificated then you have only to break off a notch on the new modificated battery holder connector so it can be placed in the older not marketing technical modificated housing, and you have to change the switch and the battery connector , the differences are 091A. 643844-1 old batteryconnector (2 contacts) change into 091B. 644808-8 New modified batteryconnector (3 contacts with deep discharge protection it has a limit until a level) 088A. 650578-9 Switch old model (2 contacts) replace for a 088B. 638882-6 New modified switch (3 contacts ) What you need is even expensive by this model if you have a modified type with the 3 contacts to know what can be wrong else is remove the brushes charge you battery and measure it first if its full and take a multimeter measure tool between both brushholder measure and pull the trigger that must between give 16and 20 volt DC if the battery was good charged . next measure is ohms resist measure both brushes in the brushholders and measure for a few ohms from brushcontact to brushcontact throught the armature inside the machine. if not a resistance to get measure through the armature without brushes if some object or parts was comming trough the ventilation of the machine between armature and brusholder then the brush beet not the collector anymore different things to look at . Look also how the kind of wiring technik of the armature is different left is a old kind of armature that will last for 5 years or more its having thicker wiring and an other winding pattern instead of the modern kind of armatures from the last years from 2009 and later Johnson armatures by PANASONIC MILWAUKEE, MAKITA , this new armature has a lot of more power but its faster defect because of the to tight tolerance of heat dissipation and ventilation but thats most in time of inbetween 2 or 3 years worn by the great strength and light machine makes this rapidly abuse when it is going to slowly get gives a shrill sound then i know there is also not much power on , batteries are fast empty and no power left ( AND THE PROBLEM IS PEOPLE THINK THE BATTERIES ARE GETTING OLD no thats not the problem but the armature is it and as before its eating carbon brushes in between 1 month again so fast if its worked in daily use. ALWAYS REPLACE BRUSHES AND ARMATURE (thermical shortings not to see but to hear and measure) at the same time it isnt not so expensive as that you choose new batteries and the batteries work great on a other tool . if the machine has eating the brushes with the old armature left on picture nothing was happens and it last again in good condition but the power difference is great between the old and the new armatures of the brand Milwaukee 18V to compare this old was Milwaukee 18volt and right the same kind of new sensitive armature like Panasonic or Makita have used in their tools.

Hi,
It sounds like the problem is the battery. It sounds like there are shorted cells in it so that it starts to draw too much current from the charger and the charger shuts down as a safety measure.
I hope this helps,
Happy New Year,
Mark

But sometimes the armature can be fused in by melting coil part of the electric field you mean ? if the electric field is damaged by overheat some shortened windings then its become sometimes a disassemble problem . Makita HR3000C Rotary Hammer Parts

Beware that its an old type Makita where several parts are not are deliverable any more lubrication is the first reason leaking 2 seconds and if its leaking it becomes hot inside has lost its pneumatic working so the parts are become hot and will be worn soon and the person who works with leaking tools overload themselves rather than the work object. Makita has sometimes problems in front of the impact bolts by its rotary hammers. to observate the part cilinder 331559-9 very carefull if its not torn nowhere and this applies also to part tool holder 323912-3 it must be smooth inside in front where the impact bolt is sealed Makita HR3000C Parts Breakdown

HI,

THIS WILL HELP YOU
http://powertool.manualsonline.com/manuals/mfg/makita/hr2450t.html



thank you,
vijay (vote for me)

Exchanged Makita HP1640 hammer drill for a new one. The 2nd drill did the same thing in under an hour!! Will return for refund. Instructions say the Forward/Reverse switch must be in a full up or down position for the Hammer/Rotary switch to move; well, it is and the Hammer/Rotary switch still stops at a 1/2 way point between modes. Although I can still use the drill, instruction warnings say not to because it may potentially burn out the motor. I'll have to go with a different brand this 3rd time around. It seems to be a design flaw.

Sat idle for a few years? The start capacitor on the motor is probably dead. Replacing the start/run capacitor, typically 1.5uF to 2.5uF is easy if you can disassemble the unit. Any appliance spare parts shop has these. The carbon brushes on a machine like this also may have failed (chipped and cracked) if you haven't run the machine for a long time and it previously did a LOT of work. The brushes are usually available as spare parts and easily changed.

If you have been using the same setting for a long time you would have worn out the friction plates in the gear box. Its like a clutch plates of a car.. You can replace the whole gear box assembly by purchasing the same from their web site.

Lithium batteries have a limited lifespan, typically 3 or 4 years, and their capacity between charges decreases over the years.
To extend the lifetime of a battery it should be run completely flat after every few charges rather than topping it up. New batteries need to be charged several times and run flat under normal use before they gain their full capacity.

replace with new unit

there may have been a internal gears broken.

i would suggest that you just buy another new unit, fixing it would be a pain in the ___.

check the detailed power outputs ,if they are almost the same voltage and milliamp output. then you can use dc1413. usually they are almost the same specs

sounds like a short in the trigger switch, open up the handle and check connections and wires. make sure everything is fastened.

To protect the collector in the commutator circuit of the armature thereis a small little but very strong spring that will come out of inside the brush so that there is made an open circuit and the drill stopped because of that SO that the compression spring of the carbonbrush will not damaged the collectors of the armature .