Date: Fri, 11 Aug 2006 15:54:05 -0400 From: Fred W <Malt_Houndnospamm-me-not*yahoo.com> Subject: Re: sabb brakes wobble
Dave Hinz wrote: > On 11 Aug 2006 11:05:32 -0700, darthpup <amchitkanospamexcite.com> wrote: > >>New discs are not warped Dave. I use WD40 all time with good results. >>Try it you might learn something. > > > Which point about WD-40 that I specified do you disagree with? That > it's a Water Displacer (notice the letters), or that it leaves a sticky > residue? It's not a penetrant. It's a lousy lubricant. The only thing > _I_ use it for, is as a cutting fluid when turning aluminum on the > lathe, for that it's fine. As far as any sort of putting it on brakes, > though, it's entirely the wrong substance. > > Further, how do you reason that pulsating source (bidrectional) is > caused by a stuck caliper (a static, one directional force)? What > possible circumstances could make that be true? I'm trying to picture a > stuck caliper causing a pulsation, and the geometry just isn't there. A > drag, sure, but that'd be consistant unless the _rotor wasn't planar_. > > So, other than suggesting the wrong chemical to fix the wrong problem which > doesn't match the symptoms described, your advice is right on. If you > do have some actual logic or reasoning behind your, um, theory, I'd be > delighted to read it. > > I actually once had a severe wobble caused by a stuck caliper. It caused the brake rotor to heat up so much while just driving (no brakes applied) that the rotor warped and the pulsation was wild. So really the rotor was warped causing the pulsing but the "root" cause was a bad caliper. -- -Fred W
