Originally Posted by bobpowell
We took a little trip in the Gulfstream Sunclipper today and at one point I had to brake hard for someone who refused to give way as they should have. The RV was verry sluggish after that and I pulled over. When we stopped we smelled the smell of burning brakes.
It seems that the front calipers had jammed on. particularly the right front which was really hot. We removed the wheel and i undid and re tightened the bleed nipple which freed up the brake immediately but pressing the pedal down locked them once more.
I wasn't far from home so we limped back on the park brake but arriving at home I tested the brakes and there was no problem at-all. I think it was due to overheating in hard braking.
So, the question is, would a vapour lock pressurise the brakes enough to lock them on? Should I change all the brake fluid for fresh or should I look for deeper and more costly problems?
BOB: you don't say which chassis or braking system you have, but the issue of sticking calipers is the subject of at least two "recent" recalls, one by Workhorse for the Bosch pin-slide calipers they used on the W-20 -22 chassis and more recently by FCCC for the Bosch calipers they used on their "fred" chassis. Once applied, the pistons don't retract in the bores and the resulting dragging of the pads against the rotors can create lots of heat and collateral damage.
Changing the fluid is always a good idea, but may not remedy the root cause which is swollen pistons. The recalls were to replace the entire caliper and other parts that were collaterally damaged, if necessary.
Which chassis do you have?