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I re-seated the 2470 brushes, and re-seated the power cord, and that seems to have resolved the intermittent working. We'll see if it holds. I'll check out the holder. I don't have a SDS bit yet so I'm using a chuck converter in rotary mode. Getting alot of chuck wobble but assume that's the cheapie converter. The guidance says not to use the converter in hammer which I imagine it would shatter the chuck throwing shrapnel everywhere! Just need to fix the cordless dhr242

Cheers. I have managed to source what appear to be the service manuals (titled Technical Information). I used the 2470 at the weekend with a sds chuck convertor and a mixing paddle to mix up a batch of plaster. I had to keep switching the drill from reverse to forward to get it started again. Eventually drill gave up but one time it went full on so I'll open it up again at some point. Still though I'll look to the contacts and cables because maybe it's the movement causing the intermittent fault.

Hi, First post. I salvaged two drills that contractors discarded in the waste pile of a job hired for (must have been loads of profit or knackered drills . 1st drill corded Makita HR2470. Did not work so I opened it up and it appeared serviceable and I saw the brushes were floating. I reseated the brushes and the drill now spins up. Not sure what to test now but it maybe useful as maybe a mixer. 2nd drill is a Matika DHR242. Rotary hammer drill. This one looks more difficult to fix. Firstly it's battery powered but I may have a bench supply but not sure how much current it will want to test it. I opened up the drill and with the brushless motor there wasn't much to service - some electronic gubbins. I think the gearbox maybe kapput. Even following the guidance on rotating chuck and changing the 3 switch (rotation, hammer, etc) it will not go on rotation and jams. Are these brushless based tools serviceable or straight to the skip?