On Jan 16, 7:43*pm, "DoN. Nichols" wrote:
On 2011-01-16, axolotl wrote:

The patient is a badly abused 5" 3 jaw bought yesterday at Cabin Fever.
The scroll/jaws are frozen. What is the procedure to open the case and
disassemble?

* * * * Never had a genuine Buck -- but the basic principle would be:

0) * * *Before doing *any* of this, prior to removing anything, check
* * * * for marks so the parts can be reassembled in the same relative
* * * * position as they were before. *If there are no marks, make some.
* * * * say two center punch marks on either side of the dividing line
* * * * between the chuck body and the adjuster collar, and three on
* * * * either side of the dividing line between the adjuster collar and
* * * * the backplate.

1) * * *Remove long screws through body to backplace.

2) * * *Remove backplate.

3) * * *This should expose counterbored screws in the collar which
* * * * carries the offset screws. *Remove those screws to remove the
* * * * collar from the body of the chuck.

4) * * *At this point, you should be able to get to the screws which
* * * * attach a reduced diameter cover plate from behind the scroll
* * * * plate. *Remove these, and the backing plate.

5) * * *Remove the scroll plate. *(The bevel gears on the wrench
* * * * sockets may be on either side of the scroll plate, so you may
* * * * have to remove them before you remove the scroll plate.

6) * * *Once the scroll plate is out, the only thing holding the jaws
* * * * in place should be friction. *Depending on how badly abused the
* * * * chuck was, you may have to drive them radially out -- using some
* * * * aluminum or hardwood to transfer the hammer blows to the jaw
* * * * bodies close to the surface of the chuck body. *(Lubricate the
* * * * ways first, of course.

* * * * Good Luck,
* * * * * * * * DoN.

--
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I agree. I would also mark each jaw (if it doesn't already have a
number or set of punch marks) and the corresponding slot that it is in
to make sure that they can be reassembled the same way. Assemble it
back the same way that you dissembled it.