Clint Cummins, Dan Merrick(AKA Banquo), John Cook and I were out at Discovery Wall yesterday to test out some new tools for removing bolts, primarily wedge bolts and Rawl split shafts.
Dan made a couple of tools and I brought a couple of tools which Greg German(AKA Gregger Man) made. We pulled and replaced 8 wedge bolts(some 30 years old!) and one Rawl split shaft. Here are some photos to illustrate what we did.

Dan has been working hard to come up with a way to replace wedge bolts without using power tools. The first step is to tap the bolt back into the hole. Next you try to spin the bolt in the hole to put a groove in the shaft of the bolt where the cone slides up. If you can get a deep enough groove, when you try to pull out the bolt, the cone can't slide up the shaft so the pullout strength of the bolt is decreased to a force that allows removal without breaking it off in the hole.
We were able to remove all but one wedge bolt and then drill out the hole to 10mm from 3/8" and lengthened it an inch or so for the 3.5" SS Powers bolt to be inserted. BTW, those of you who are still having spinning problems with 3/8" Powers bolts, it is a simple and easy fix to switch from 3/8" to 10mm bits.
Here's a photo of using a speed wrench to spin the bolt in the hole(after the nut and hanger have been removed) to create the critical groove. There is an adapter at the end of the wrench which screws into the exposed stud. Needless to say, for these tools to work properly, or at all for that matter, the threads on the end of the bolt have to be in pretty good shape.

Here's a photo of the cool tool that Dan made to pull the bolt. It is a hydraulic pop rivet gun that can exert about 3300 pounds of force. It only has a workable throw of about 3/4" so you need to insert spacers as the bolt comes out of the hole. Dan made a fitting which screws into the tool and also threads onto the end of the bolt stud.

Viola!

Here's a photo of the pulling tool that Greg German made. Not as nice as Dan's tool, but it gets the job done. It is seen here pulling out a 3/8" Rawl split shaft. You screw the stud into one end of the tool and use a BFW to turn the big nut on the other end.

The obligatory before and after photos.

