BL motor tool

[Gherman]

So I did a opsie and after getting a second hand impact wrench disassembled it to clean it and to have a look inside (as you do) after that when I put it back together noticed a grinding noise (the tool is basically brand new 2024 and it's sounded fine when I got it) after disassembling it again and outing it back together checking everything 12 times same noise I'm positive its not the bearings 85% sure I assembled it right the only thing that croses my mind is some kind of calibration to the motor that I must have thrown off I'm not really sure I'm not that familiar with brushless motors

How would I repair this?

Links to videos of the carnage:

 

[Delta Prime]

Welcome to Maker Pro. I don’t watch videos; make, model number, of your unit, please.

 

[Martaine2005]

No calibration needed for the motor.
Something has been put together wrong. Here’s a couple of ideas/reasons:
Motor not seated in clam shell properly.
Gearbox not seated properly.
Bearing/s not seated properly.
Forward/reverse lever not in slot on trigger.

The clam shell has various protrusions that allow for a shim behind and bearing in front, make sure they are correct. Also, does the motor have any position where it fits the shell better? ie by rotating the motor a little in the shell.
Finally, check that no debris got onto the pinion shaft and gear meshing. And that no debris got into the motor itself.

 

[Gherman]

No calibration needed for the motor.
Something has been put together wrong. Here’s a couple of ideas/reasons:
Motor not seated in clam shell properly.
Gearbox not seated properly.
Bearing/s not seated properly.
Forward/reverse lever not in slot on trigger.

The clam shell has various protrusions that allow for a shim behind and bearing in front, make sure they are correct. Also, does the motor have any position where it fits the shell better? ie by rotating the motor a little in the shell.
Finally, check that no debris got onto the pinion shaft and gear meshing. And that no debris got into the motor itself.

I should have updated it but now the front panel (lights speeds and modes) isn't working properly and I'm thinking i stressed a wire or a connector or messed up the logic.