 more than a thousand pounds of brake fluid pressure you're never going to get that with air maybe 250 if you're super lucky and get a compressor that big but not many around interesting yeah but yeah you could try it but i don't know if that thing is going to leak or not they leak when they had those on airplanes i mean they just they were leakers but that caliper if you haven't touched it and it doesn't look like the threads are all ripped up in it definitely get a hold of the company and say you want another one say i've tried to thread the bolt in by hand and it will not go in there because the threads are not good