I use a Porter Cable 890 in the router table. The collet lock has broken and is forcing the locking pin against the collet. If it's not removed, the part will end up breaking off, falling into the motor and destroying it. As a first step in repairing, I need to remove the motor from the base. Can anyone tell me how to do this? I tried taking the motor out by lowering it through the base, but it only goes so far and stops. Next, I tried raising the motor free of the base - same result. I have cleaned all of the sawdust from between the two parts and the motor moves freely until it's almost out. Thanks for any suggestions.