Coaster Brakes - dragging / sticking after rain / wet roads
in [Toyota Trucks]
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From: Robbo on 12 Sep 2007 02:38 We may have a problem with the brakes on a 2006 Toyota Coaster bus (6 cyl diesel) that someone here may be able to advise on. Hopefully I'm not too far OT. The driver says the brakes drag or lock on a little after being driven in the rain and then being parked overnight. After using the brakes half a dozen times they come back to feeling "normal". The brakes (front disks & rear self adjusting drums) are otherwise working well and have plenty of friction material left. My only ideas are dust / water causing binding in the drums until a bit of heat dries it out. Has anyone experienced this before? Any advice gratefully received. regards r.
From: Bruce L. Bergman on 12 Sep 2007 10:57 On Wed, 12 Sep 2007 14:38:43 +0800, "Robbo" <weiner2(a)spammo.com> wrote: >We may have a problem with the brakes on a 2006 Toyota Coaster bus (6 cyl >diesel) that someone here may be able to advise on. Hopefully I'm not too >far OT. > >The driver says the brakes drag or lock on a little after being driven in >the rain and then being parked overnight. After using the brakes half a >dozen times they come back to feeling "normal". > >The brakes (front disks & rear self adjusting drums) are otherwise working >well and have plenty of friction material left. > >My only ideas are dust / water causing binding in the drums until a bit of >heat dries it out. Has anyone experienced this before? Any advice gratefully >received. Parked after driving in the rain, so the rotors are hot and wet... Flash rust on the rotor/drum surfaces? That will make the highly polished surfaces on the rotors rust fast. When you hit the brakes a few times, you wear the rust off and the brakes feel 'normal' again. --<< Bruce >>--
From: Robbo on 12 Sep 2007 20:34 "Bruce L. Bergman" <blnospambergman(a)earthlink.invalid> wrote in message news:pavfe3h3pa7netapiin2uuuguubkqtgkth(a)4ax.com... > On Wed, 12 Sep 2007 14:38:43 +0800, "Robbo" <weiner2(a)spammo.com> > wrote: > >>We may have a problem with the brakes on a 2006 Toyota Coaster bus (6 cyl >>diesel) that someone here may be able to advise on. Hopefully I'm not too >>far OT. >> >>The driver says the brakes drag or lock on a little after being driven in >>the rain and then being parked overnight. After using the brakes half a >>dozen times they come back to feeling "normal". >> >>The brakes (front disks & rear self adjusting drums) are otherwise working >>well and have plenty of friction material left. >> >>My only ideas are dust / water causing binding in the drums until a bit of >>heat dries it out. Has anyone experienced this before? Any advice >>gratefully >>received. > > Parked after driving in the rain, so the rotors are hot and wet... > > Flash rust on the rotor/drum surfaces? That will make the highly > polished surfaces on the rotors rust fast. When you hit the brakes a > few times, you wear the rust off and the brakes feel 'normal' again. > > --<< Bruce >>-- > Thanks Bruce - I think you are right. I did some more searching and found reference to the same issue with some toyota cars. regards r.
From: SnoMan on 12 Sep 2007 21:45 On Thu, 13 Sep 2007 08:34:40 +0800, "Robbo" <weiner2(a)spammo.com> wrote: > >"Bruce L. Bergman" <blnospambergman(a)earthlink.invalid> wrote in message >news:pavfe3h3pa7netapiin2uuuguubkqtgkth(a)4ax.com... >> On Wed, 12 Sep 2007 14:38:43 +0800, "Robbo" <weiner2(a)spammo.com> >> wrote: >> >>>We may have a problem with the brakes on a 2006 Toyota Coaster bus (6 cyl >>>diesel) that someone here may be able to advise on. Hopefully I'm not too >>>far OT. >>> >>>The driver says the brakes drag or lock on a little after being driven in >>>the rain and then being parked overnight. After using the brakes half a >>>dozen times they come back to feeling "normal". >>> >>>The brakes (front disks & rear self adjusting drums) are otherwise working >>>well and have plenty of friction material left. >>> >>>My only ideas are dust / water causing binding in the drums until a bit of >>>heat dries it out. Has anyone experienced this before? Any advice >>>gratefully >>>received. >> >> Parked after driving in the rain, so the rotors are hot and wet... >> >> Flash rust on the rotor/drum surfaces? That will make the highly >> polished surfaces on the rotors rust fast. When you hit the brakes a >> few times, you wear the rust off and the brakes feel 'normal' again. >> >> --<< Bruce >>-- >> > >Thanks Bruce - I think you are right. I did some more searching and found >reference to the same issue with some toyota cars. >regards >r. > I had this problem with a GM truck. That got so grabby sometimes that it would lock up rear axle at light effort. I cured it by lightly turning drums (just enought to true them) and installing new shoes with a lower metalic content. ----------------- TheSnoMan.com
From: Robbo on 12 Sep 2007 21:49
"SnoMan" <admin(a)snoman.com> wrote in message news:rd5he3dlothfdpj0sg3ua122oepsq3v49m(a)4ax.com... > On Thu, 13 Sep 2007 08:34:40 +0800, "Robbo" <weiner2(a)spammo.com> > wrote: > >> >>"Bruce L. Bergman" <blnospambergman(a)earthlink.invalid> wrote in message >>news:pavfe3h3pa7netapiin2uuuguubkqtgkth(a)4ax.com... >>> On Wed, 12 Sep 2007 14:38:43 +0800, "Robbo" <weiner2(a)spammo.com> >>> wrote: >>> >>>>We may have a problem with the brakes on a 2006 Toyota Coaster bus (6 >>>>cyl >>>>diesel) that someone here may be able to advise on. Hopefully I'm not >>>>too >>>>far OT. >>>> >>>>The driver says the brakes drag or lock on a little after being driven >>>>in >>>>the rain and then being parked overnight. After using the brakes half a >>>>dozen times they come back to feeling "normal". >>>> >>>>The brakes (front disks & rear self adjusting drums) are otherwise >>>>working >>>>well and have plenty of friction material left. >>>> >>>>My only ideas are dust / water causing binding in the drums until a bit >>>>of >>>>heat dries it out. Has anyone experienced this before? Any advice >>>>gratefully >>>>received. >>> >>> Parked after driving in the rain, so the rotors are hot and wet... >>> >>> Flash rust on the rotor/drum surfaces? That will make the highly >>> polished surfaces on the rotors rust fast. When you hit the brakes a >>> few times, you wear the rust off and the brakes feel 'normal' again. >>> >>> --<< Bruce >>-- >>> >> >>Thanks Bruce - I think you are right. I did some more searching and found >>reference to the same issue with some toyota cars. >>regards >>r. >> > > > I had this problem with a GM truck. That got so grabby sometimes that > it would lock up rear axle at light effort. I cured it by lightly > turning drums (just enought to true them) and installing new shoes > with a lower metalic content. > ----------------- > TheSnoMan.com Thanks Snoman. Weve got a break comming up in a few weeks. We'll pull the rear wheels and see what they look like then. regards r. |