UPbansheeRacer Posted May 20, 2012 Report Share Posted May 20, 2012 it does it to me atleast twice a week ill be driving front brakes will be fine then they will just about lock up so i put it away and then the next day i go to drive it and its fine...its really making me mad anybody got any ideas Quote Link to comment Share on other sites More sharing options...
NickisGod Posted May 20, 2012 Report Share Posted May 20, 2012 sounds like to me u need new pads in the front. if not then im assuming ur pistons are getting stuck when u hit the brakes and not retracting back into the caliper. take it apart and i bet it will become obvious. Quote Link to comment Share on other sites More sharing options...
erickson483 Posted May 20, 2012 Report Share Posted May 20, 2012 Your slide pins could also be dried up and sticking. Quote Link to comment Share on other sites More sharing options...
thomas h. Posted May 21, 2012 Report Share Posted May 21, 2012 X2 on slide pins. File down ridges or replace pins if worn. Lube with bearing grease or moly or marine grade or high temp or astro... Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted May 21, 2012 Report Share Posted May 21, 2012 That's something you should fix the first time it happens. But do they completely lock up, or just start to drag? Quote Link to comment Share on other sites More sharing options...
UPbansheeRacer Posted May 21, 2012 Author Report Share Posted May 21, 2012 They dont completely lock up they just start to drag. Im not even using the front brakes at the time it does it i will just be driving down the road or a trail and ill notice that they are starting to hangup when i havent even touched the front brake. Then i can let it sit for a while and come back and it is completely fine. Im thinking about getting all new brake discs and pads and rebuilding the front master cylinder anyways hopefully i can fix it. Building a sandrail right now though so i dont have the funds to put much into my banshee i wanted to buy a full frame and a arm skid plate for it and put new discs and brake pads on it and rebuild the master cylinder but ill do all of that this fall when im done with the other project. Quote Link to comment Share on other sites More sharing options...
erickson483 Posted May 21, 2012 Report Share Posted May 21, 2012 Pull off the calipers then clean and grease the slide pins. This won't cost anything to do, and if you haven't done it before I'm sure it needs it anyway. If that doesn't fix it I would have to assume the caliper needs a rebuild. Quote Link to comment Share on other sites More sharing options...
Nieskes Posted May 21, 2012 Report Share Posted May 21, 2012 Take them off and just use the back brake!!!!!!! Quote Link to comment Share on other sites More sharing options...
UPbansheeRacer Posted May 22, 2012 Author Report Share Posted May 22, 2012 Naaaa I don't wana be ghetto with my banshee haha I like having front brakes....ill take them apart tmrw and clean them and see what's up Quote Link to comment Share on other sites More sharing options...
Starwriter Posted May 22, 2012 Report Share Posted May 22, 2012 Is something preventing the master cylinder from releasing all the way? There is a feed hole between the reservoir and the bore that is supposed to be open when the master cylinder is released. When you first start applying the brakes, the piston cup goes past that hole and pressure starts to build in the system. If the master cylinder is partially applied, that hole is not open to the reservoir. As the brake fluid heats up, it expands and applies the brakes because the fluid can't go back into the reservoir, which makes more heat, which builds more pressure till they finally lock completely. When you park it, the fluid cools down, the pressure decreases. Another possibility is that some idiot put oil in the reservoir which swells up all the rubber parts. Quote Link to comment Share on other sites More sharing options...
Tedder Posted May 23, 2012 Report Share Posted May 23, 2012 Before changing professions 27 years ago I was NIASE certified in brakes. Every once in a while I'd run into a caliper that would lock up but if the bleeder was cracked the piston could be freely pushed back. It's kind of hard to describe but what was happening is the inner liner of the rubber brake hose would split and allow the fluid to be forced out around the fabric woven into the line and it would collapse the inner liner making it impossible for the fluid to return to the master cylinder. Sometimes if left alone for a while it would release only to lock again after applying the brakes and forcing the fluid into the pocket pinching off the return flow again. Hope that helps. Quote Link to comment Share on other sites More sharing options...
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