By the way, that's usually a good indicator that your pads & shoes are worn & close to due for a replacement. As your brake pads wear the friction material down, the piston moves further out of the caliper in order to make the pads contact the rotor. The space behind the pistons gets filled by fluid from your master cylinder. When your master cylinder is very low on fluid, it's time to check your brake pad thickness.

95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes