Makita Drills - Answered Questions & Fixed Issues

"Looking for a front part picture or schematic of the Makita gearbox 123443-0 DHP482, specifically the front selector rings? While main gearbox images are widely available, detailed visuals of the front selector rings may require specific technical documentation or contacting Makita directly for assistance."

Do you leave them plugged into the mains all the time? Voltage spike possibly. They can be repaired, but you need the model number in the search query. https://www.google.com/search?q=Makita+charger+repair ..

If the red and green lights are flashing, the charger is detecting the battey has a defect and is not safe to charge. It could be one of the cells in the battey, a short in the wiring or circuit board or bad contacts. Usually the only fix is to replace the battery.

The Makita DC18RC charger is equipped with a diode labeled D14 that helps regulate the voltage. It is a 1N4007 diode, which is a 1-Amp, 1000-Volt diode. You can find the electrical schematic for the DC18RC charger online with a quick search.

Send it for warranty repair. They are supposed to be tough. https://www.google.com/search?q=Makita+DGD800+18v+die-grinder ..

The pcb inside the battery has a microcontroller that monitor the charges and charge cycle. When the cell falls below a certain voltage, it will instruct the charger not to charge and will show with a red-green flashing light. If the battery has been tried 3 times in succession then the pcb will brick itself from the makita charger. So first replace the bad cells. There are 2 solutions at this moment: charge with a 3rd party lithium charger like the imax b6 or replace the pcb with a working one. check out my blog on http://mkbl1830.blogspot.com/

I don't really know how a chuck works. I use them often on a drill press, cordless drills, etc. My grandfather always said to "check the simple things first." Could something have gotten in the way like saw dust, dirt.....? ? I might suggest trying using compressed air and blow it out? You can buy a can of compressed air at office depot.

There are no serviceable parts in this charger, it is a replacement item

Lithium Polimer batteries are 3.7volts per cell. They need specialist charging and protection. Maybe not the best choice ...

The switch will need to be replaced

Yes, because the voltage and amperage input to the charger is constant, so the board management dumps excess charge once the battery is fully charged. The battery cools, but the charger warms up. Mine does the same. It is a 15 minute charger, so the current is high.

Makita DC18RC 18V Lithium-Ion Rapid Optimum Charger

https://www.amazon.ca > Makita-DC18RC-Lithium-Ion... Industry leading charge times of 15 min. · During the charging process, the Rapid Optimum Charger monitors actively controls the current, voltage and temperature ... Battery Cell Type: ‎Lithium Ion Style: ‎Plug Batteries Included?: ‎No Power Source: ‎Ac

I think your tryiong to charge NIMH batteries oon a charger designed for Lithium Ion batteries. With all the new style batteries such as NICAD, NIMH and LI-ION, charging becomes difficult. Most chargers pre NIMH and LI-ion, were designed for NICAD's. The best advise, match your batteries with the correct charger

Hi. Just to clarify, it is a rotary hammer drill, not an impact drill? In most cases those machines put out 3 joules of energy on the back of the drill bit. If it was a cheap bit, the hammer action "mushrooms" the end of the bit making it difficult to remove. You could try to force it out using a bench vise, but you could damage the chuck.

Wiring? Ask Makita direct. https://www.makitatools.com/products/details/5402NA Parts Schematic https://www.ereplacementparts.com/makita-5402na-beam-saw-parts-c-97_98_101_102.html

Unfortunately, Makita’s li-ion battery packs have a design flaw. After having the same problem with my two batteries, I took it apart and saw the problem immediately. You see each battery pack has ten li-ion battery cells and a circuit board with a memory chip witch holds the charging history of the battery pack. But that memory chip constantly draws power from 2 of the 10 batteries. The current it draws is very small but if you consider it over 8 month or more, the power drain becomes very significant. You end up with a battery pack with 8 still fully charged battery cells and 2 drained battery cells. When you put this battery pack in the charger, it detects weak battery cells, assumes they are defective and refuses to charge. To avoid this problem you should charge your battery pack often, even if you haven't used it, every two months should be ok.
I suspect that Makita doesn’t make these battery packs, they make power tools, good ones too. Buy Makita should definitely have a few words with their supplier before they become a liability!

If both lights are flashing it means the battery is defective so it won't charge it. By defective it could mean the battery is just worn out or there may be a short in the battery. If the battery is under warranty you can get it replaced at a Makita Service Center, if not you have to buy a new battery.

I think this radio uses two different sets of batteries. There is the smaller batteries that store preset radio stations and a larger battery pack to power the actual radio. If your partner had other Makita cordless tools some of those batteries will fit and there will be a charger for them. I've put a link to a website for a users manual. (try looking at page 3. The larger battery will be a black block which is the same type used for the cordless tools. The squarer battery pack style should slide upwards towards the handle and the rounder shape battery packs should just pull out. Talk to a good builder or a Trade tool supplier and they may be able to help or order you the power cables you need. If not contact Makita directly and they will be able to help you. https://www.manualslib.com/manual/1339075/Makita-Xrm04.html?page=3#manual

Based on experience I can tell you that it is is generally the temperature/cutoff/individual cell monitoring sensor in charger that dont allow the batteries to take a charge. Once the same condition is detected 3 times by the same charger it considers the batteries to be bad and refuses to accept it. I have 2 batteries that wont charge on one charger but works perfectly fine when i charge it on my other Makita charger so basically there is no problem with my batteries.
I would suggest first you check the voltage of your drained battery by a test multimeter. For 18volt battery if it is close to 18volts 1-2 volts less is just fine! Then there is no issue with your battery. Makita chargers are very expensive hitech which is useless in my opinion the lipo chargers (used in rc hobby) example skyrc are better quality cheaper and does a better job and you can easily charge your makita battery with it as well but this is only recommended if you decide not to go with Makita charger any more. Some basic information about multi chargers for Li-ion battery to follow the safety is make sure you use the right connectors with correct polarity. For 18v volts max voltage should not exceed more than 20.50 and the allowable charge current is 2.7amps also ensuring that batteries dont heatup.

To remove the chuck, unscrew the 4 screws that hold the chuck housing to the body of the drill. Put the chuck housing in a vise & remove the bearing retainer... it has a left hand thread, so righty loosey. Once the bearing retainer is out, the chuck slides out of the housing. Don't waste time looking for a screw because there isn't one.

R91 is 2R4 ohm