Those two mounting bolts (caliper to axle) are tough to remove. They are installed to 55 ft-lbs of torque, with loctite thread-locker. Some have red, some have blue. Heating them modestly will help. As will a 1/2″ drive ratchet wrench with an 18″ or so handle. A propane torch will soften the loctite, but be careful as too much will melt rubber seals, boil brake fluid and do other things that are bad. If you see any signs of red around the bolt, it will need some heat as red loctite is a bear to remove without it, you can even twist the bolt into two pieces if you are not careful.I would reassemble after cleaning the bolts carefully, using BLUE loctite which will still be a bear to remove, just not a grizzly bear like red.
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