[Ken2]

OK, I did a search on this problem and I see several similar, but I don't see any solution to this particular problem:

I am running a Deore crankset with XT bottom bracket, ES71, which is octalink. I have self-extracting crankbolts and the driveside came off fine.
Problem is, when I went to remove the left crank, instead of extracting, the crankbolt just broke out the extracting cap! (see photo #1). So I sprayed WD40 in and let 'er soak for an hour, then put on the intact extractor cap from the driveside crank arm. But, as I'm unscrewing the crankbolt, I see that this extractor cap is starting to bulge just like the other one did, before it split into 2 pieces (photo #2).
Methinks the crank is just on too tight. I put it on myself and I know the octalink is greased well, but it has been untouched for 2 years. I started hearing a click which is why I was pulling the crankarms in the first place, to check on the BB.
I can't get a crankpulling tool on here as far as I can see, because the self-extracting bolt and washer blocks access. And I can't see any way to get at it from the other side.
Any other ideas? Am I overlooking something?

 

[One Pivot]

that allen bolt comes completely out doesnt it? remove the bolt and washer completely, and remove it with a standard crank puller. depending on the puller, you might need to stuff something inside the spindle. i think i had to use a 8mm deep socket on my old xt crank, but the interface and bb should be identical.

 

[crazy8]

You can also try heat. Before you use the self extracting bolt heat the arm. It being aluminum and the spindle steel the arm will expand more making it possible to slip free .