Genuine new WABCO ABS brake accumulator. If the brake pump runs every other time you push the brake pedal, the accumulator is BAD and is damaging the brake pump. It is also dangerous to drive this way since the brakes might not be there
if needed a second time in rapid succession. Fits all Range Rover Classics, 1990 though 1995.
With a good accumulator the Classic brake pump, after sitting overnight, should be able to turn the brake pressure light off in about 10-15 seconds, and fully charge the system in about 25-35 seconds. If the pump runs more than 45 seconds the accumulator is not at fault: you should probably read our book