[Healeys] Brake Lockup

Wed Aug 5 21:04:32 MDT 2020

Hi Bob -

If you have the original chrome plated Girling pots in there, little bits
of corrosion can start, causing the pot to stick a little.  Worth taking
the right caliper off (it's easy) and taking the pots out looking for
rust.  If that's the case, easy fix, replace the pots with SS replacements
and the seals, you'll never have a problem again.

Best Regards,

Alan

On Thu, Aug 6, 2020 at 10:26 AM Bob Spidell <bspidell at comcast.net> wrote:

> Flex lines are 'normal' rubber; but fairly new. I checked the hard line
> today; no kinks (my memory was playing tricks again).
>
> It pulls down straight; looks like replacing the kinked RR hard line might
> have helped (ya' think, Bob?). I'll pull the wheels and have a look at pads
> and rotors; might be a while as I'm starting to think about harvest.
>
> Bob
>
>
> On 8/5/2020 5:54 PM, Harold Manifold wrote:
>
> You should be able to judge if the callipers are apply even pressure to
> the disk by the wear pattern on each side of the disk. If the wear is even
> and the surfaces look very similar likely the pads are not seized. Don't
> rule out air in the brake line. Are the flex hoses rubber or stainless
> steel braid? You may have a flex hose that is expanding due to pressure in
> the brake line.
>
> Harold
>
> ------------------------------
> *From:* Healeys [mailto:healeys-bounces at autox.team.net
> <healeys-bounces at autox.team.net>] *On Behalf Of *Bob Spidell
> *Sent:* Wednesday, August 05, 2020 10:00 AM
> *To:* Michael MacLean; Austin Healey
> *Subject:* Re: [Healeys] Brake Lockup
>
> Your $0.02 is appreciated. Rotors and pads were replaced not too long ago,
> but it's probably been 20 years since I rebuilt the calipers.
>
> Bob
>
> On 8/5/2020 9:27 AM, Michael MacLean wrote:
>
> Maybe the right caliper was fluid starved for so long that is froze in
> place or at least is binding up for that reason.  If all the brake lines
> are clear, the only thing left is the caliper.  Sounds like time for a
> rebuild.  Just my two cents.
> Mike MacLean
> On Tuesday, August 4, 2020, 10:07:19 PM PDT, Bob Spidell
> <bspidell at comcast.net> <bspidell at comcast.net> wrote:
>
>
> Flex lines are only a couple years old, and the hard lines are fairly
> fresh cupro-nickel. You got me thinking, though, the RF hard line may
> have a slight kink (they're both coiled). I'll check it out.
>
> Bob
>
> On 8/4/2020 9:57 PM, sentenac.rw at gmail.com wrote:
> > Bob, could there still be some debris in the right front brake line
> > that keeps the right brake from being as effective as the left?  Or an
> > internally frayed flex line to the right brake?
> >
> > -Roland
> >
> > On Tue, 4 Aug 2020 21:50:42 -0700, you wrote:
> >
> >> Thanks, Kees. The car's brakes are stock BJ8; i.e. single circuit. It
> >> pulls down straight, but locks the front left only. I replaced pads and
> >> rotors about 4 years/20K miles ago, and the old gear looked to be pretty
> >> evenly worn. The right rear line was the one that was pinched, and I
> >> thought for sure that would cure the lock-up; it did pull before I
> >> replaced the line, but I don't remember the direction (pull to the right
> >> would have been expected, I think).
> >>
> >> I'll take a look at the pads and rotors when I get a chance.
> >>
> >>
> >> On 8/4/2020 9:18 PM, Kees Oudesluijs wrote:
> >>> Sounds like one of the calipers is (partly) seized. The car is
> >>> probably pulling to one side as well under normal braking. An overhaul
> >>> of the calipers and new pads would probably sort it. Also check the
> >>> discs.
> >>>
> >>> If you have a dual brake circuit fitted which is split in circuits
> >>> with one front and the opposite rear brake, check the Pressure
> >>> Differential Valve or Pressure Differential Warning Actuator (PDWA).
> >>> The plunjer should be central but can get dislodged after leakage or
> >>> bleeding the brakes.
> >>>
> >>> But first check the tyre pressures.
> >>>
> >>>
> >>> Kees Oudesluijs
> >>>
> >>>
> >>>
> >>> Op 5-8-2020 om 05:00 schreef Bob Spidell:
> >>>> Listers,
> >>>>
> >>>> Today I replaced a section of brake line on my BJ8 that I'd squashed
> >>>> with a jackstand. The operation was a success, and I got good pedal
> >>>> after bleeding, but when I stomped on the brakes only the front left
> >>>> locked-up. This has been the case as long as I can remember, but as I
> >>>> don't usually need to lock them up it hasn't bothered me. But, now
> >>>> I'm wondering 'why?' There's no adjustment on disk brakes, obviously,
> >>>> so why would one squeeze harder than the other?
> >>>>
> >>>> Bob
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