To get the block off you must first take out the set screw. It is cemented in with permanent Loctite so you need heat. I used a plastic welder set to 600 degrees. The plastic welder blows hot air in a concentrated area so the target spot for heat was less than the size of a dime. Once you have it hot enough you may get lucky with a small allen wrench, I did not. I had to tap a torex tip into the set screw and used a 1/4 ratchet to turn it out. Was not much pressure, just more than the allen could take before the wrench would spin.
Now the fun part. The pinch block is on with Loctite as well. Not sure if it is permanent or not, but it took a significant amount of heat. I set the heat gun on 800 and got the end nice and warm, guessing close to 500 but not real sure. It was not hot enough for the heat to travel up the pipe slider more than an inch or so, and the inside of the assembly has an o-ring that I did not damage, so all i can say is that I got it hot, but not too hot. The block takes a fair amount of force to break free. With the first one I did, I was able to just hold the pipe with soft-jaws in a big vise. It took a couple of resets, but eventually I broke it free. To turn the end I used a long 1" thick hard-wood dowel in the axle hole. I had to hold the dowel close to the block to keep it from breaking, but the wood prevented damaging the pinch block. The second pinch block was far more difficult. The soft-jaws would not stay in the vise because of the force, so I took a couple of wraps around the pipe with an old tube and put it back in the vise. After several attempts, it too broke free.
Anyway, the first photo is the inside of the axle pinch block when it first came off. You can see the Loctite. The second photo is the block and pipe slider cleaned up, note the big o-ring. The last photo is the reason why I took things apart to begin with. My son folded part of the pinch block over the lower adjuster. I had already replaced the same pipe slider once because of a very, very, small dent that would cause a minor oil leak. I kept the damaged slider as a door stop (good thing!!!). Figured the time spent was worth the possibility of not having to buy a new one. It payed off, and I did not even have to change out the fork seal.
