Hi Rob,
A lot of the time this type of repair can get rather expensive. When the shaft starts to have play in it it usually means there is a chance a few other parts are also worn.

You might look at the following parts on your saw and see if they are worn, the recip shaft part number, NO74353, the tube carrier part number,883098, and also look at the wobble plate part number,890819. I would guess your problem might be one or all of those parts.
Good luck,
WJA

Hi Scott,

It sounds like the pin that holds the blade in place has worn out. It is part #648594-00. You will also need the retainer kit which is part #884696.

We have an article and video available that will guide you through the repair. You can find the information at the following link...

http://www.ereplacementparts.com/article/2307/How_to_Replace_Porter_Cable_Recip_Saw_Chuck_Pins.html

I hope this helps you with your repair!

-Mark

Hey joseph,
Sometimes the clamp pin gets squared off and is very difficult to remove even with the collar pin removed...I have had to cut off the collar to remove the pin and broken off blade..UGH..its a last resort..but you will need to replace the collar # 897774 [after you cut it off] clamp pin # 648594-00..and the retainer pins..# 884696..
parts available at ereplacementparts.com..
hope this helps..?:)
Craig