DeWalt DC728 Type 10 - Jammed Adjustment Collar

[Mineral]

I received a second hand DeWalt DC728 Type 10 for my birthday and have taken it apart to give it a good clean, oil the internals and see about replacing the adjustment collar, since it is pretty worn down - the numbers have nearly worn off, etc.

While cleaning it, I managed to get part 23* - the adjustment collar - wedged forward.

No matter how much I try, I can't get it back in it's original position. I tried to remove the chuck to try and get to it that way, but couldn't get the chuck screw (part 27*) out of the chuck assembly - snapping 3 T20 torx bits in the process.

* Diagram: http://dl.dropboxusercontent.com/u/4436229/01_6026.GIF

Any idea how I'd go about getting the adjustment collar back into position? I'm stumped!

Thanks in advance!

 

[footprints]

Sorry no answers but regarding the breaking torx bits is it possible the bolt is left handed?

 

[Mineral]

Sorry no answers but regarding the breaking torx bits is it possible the bolt is left handed?

Yeah, most chuck replacement guides that I came across said it was a reverse thread screw, so I've been trying to undo it clockwise.

I ordered in a couple of titanium bits to replace the broken ones, so I'm hoping they'll be able to survive the torque needed to break through the locktight seal.

I don't have a vice to hold the drill assembly while working on it, which doesn't help - if I still can't get it off with the new bit I'm going to see if my father has an impact wrench and borrow his workshop in order to attempt this method:

Apparently, stressing the chuck (usually by using a hex wrench) can break the locktight seal on the screw, so that's my plan if it still refuses to play nice once I have access to a vice.