I`m new here of course but this is my 2nd Range Rover. My 1st was a 95 LWB. Loved it. I now have a 96 4.0se. I just purchased it with a break issue. Only the front breaks engage and they are really spongey and require double pumping and excessive force to stop. What is the cause for this? Is this an easy fix for a very mechanically inclined person?