Mdk152 Report post Posted January 4, 2013 I own a dyna max r v st 320 hydraulic brakes. Made a emergency panic stop, brakes got hot and spongy abs light came on. Got to camp ground brakes cooled down came back to normal feel. Abs comes on when starting. Unit flashes, then goes out. Anybody with experience with this or knowledge of the situation. Advise Thanks Mdk152 Share this post Link to post Share on other sites
wolfe10 Report post Posted January 4, 2013 First question on the spongy feel is how old is the brake fluid? If OE, check on CHASSIS (not coach build date). Hydraulic brake fluid must be changed every 2-3 years. It absorbs moisture (to protect the iron parts of your brake system). New brake fluid boils around 500 degrees F. Hydrated brake fluid boils under 300 degrees F. Share this post Link to post Share on other sites
dave111451 Report post Posted January 6, 2013 Wolfe's post about brake fluid is right on. Make sure you use proper brake fluid. ABS unit light came on when abs set code from spongy pedal. More than likely lite comes on and flashes then goes out because a code is stored in unit. Change fluid, then have codes checked and light reset and all will more than likely be okay. Usually when light comes on abs is shut down till until problem is resolved. Share this post Link to post Share on other sites
