I going to disconnect the hyd hose on front of the trailer( Surge Brakes) is there something I need to do before I do? Then when I put it back on how do I bleed them?
Thanksaquaforce said:Opening that line will allow the master cyl to drain out. Just drain it and then fill it up after re-connecting.
Open both bleeders at the wheels and keep the tongue up high with a small bottle of brake fluid upside down in the master cyl. It will gravity bleed fairly well that way, then you can pressure bleed after that if you choose.