[Healeys] Brake Lockup
Bob Spidell
bspidell at comcast.net
Wed Aug 5 21:27:59 MDT 2020
I think I bought SS pots when I rebuilt them, but it's been so long ago ...
On 8/5/2020 8:04 PM, Alan Seigrist wrote:
> 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
> <mailto: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] *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> <mailto: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
>>> <mailto: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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