Those pins are used to lock the shaft only during tightening on drill bits and on replacing them too, they should be a bit loose on their place you can make sure they move with tweezers a bit right and left. Also don’t pack a lot of grease it can lock everything, just lubricate the surfaces. One last thing I think will lock the chuck, any ball bearing that moved during assembly may have the same effect or its seat is damaged or worn that cause the ball to move out of the race locking everything, so during disassembly check the race for damage. Good luck,
@@ultimateworkshop2000 Thanks for responding! I cringed at the amount of tacky lube you were packing into that poor drill. 🙀While not new to repairing/rebuilding worn electrical and mechanical tools, this one is giving me a fit. I tore it down and rebuilt it no less than a dozen times. The main shaft was rotating smoothly at first, but then locked. While they did have movement and the first gear basket went in smoothly, something is amiss. If you can recall anything odd, please share. I stuck it on the shelf should I get bored one day and ordered a Milwaukee 2904, as that's the brand I started accumulating after buying the Bosch set 8 years ago. I'm honestly surprised the Bosch batteries still hold a charge.
@kookiethebear one thing I recalled when watching this part is that the shaft have 2 different features something like a notch or key way and the other feature is a flat part, the pins seats against the flat parts. You are very right about Bosch batteries mine is very healthy too and also the impactor is still doing well I bought them as combo. I have seen official Bosch videos they knew it and proud of it, I think it is the most significant differentiator between them and the other brands.
3:48 sorry excuse me for the mistake, it’s “Shim” not “Chime”
Brilliant video, thanks very much
I wish you were still around to tell me what you did with those roll pins. When I put them in that position it locks the shaft from rotating.
Those pins are used to lock the shaft only during tightening on drill bits and on replacing them too, they should be a bit loose on their place you can make sure they move with tweezers a bit right and left. Also don’t pack a lot of grease it can lock everything, just lubricate the surfaces. One last thing I think will lock the chuck, any ball bearing that moved during assembly may have the same effect or its seat is damaged or worn that cause the ball to move out of the race locking everything, so during disassembly check the race for damage.
Good luck,
@@ultimateworkshop2000 Thanks for responding! I cringed at the amount of tacky lube you were packing into that poor drill. 🙀While not new to repairing/rebuilding worn electrical and mechanical tools, this one is giving me a fit. I tore it down and rebuilt it no less than a dozen times. The main shaft was rotating smoothly at first, but then locked. While they did have movement and the first gear basket went in smoothly, something is amiss. If you can recall anything odd, please share. I stuck it on the shelf should I get bored one day and ordered a Milwaukee 2904, as that's the brand I started accumulating after buying the Bosch set 8 years ago. I'm honestly surprised the Bosch batteries still hold a charge.
@kookiethebear one thing I recalled when watching this part is that the shaft have 2 different features something like a notch or key way and the other feature is a flat part, the pins seats against the flat parts. You are very right about Bosch batteries mine is very healthy too and also the impactor is still doing well I bought them as combo. I have seen official Bosch videos they knew it and proud of it, I think it is the most significant differentiator between them and the other brands.