[Healeys] Brake Lockup

Wed Aug 5 20:26:30 MDT 2020

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> 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
>> >>>> _______________________________________________
>> >>>> Support Team.Net http://www.team.net/donate.html
>> >>>> Suggested annual donation  $12.75
>> >>>>
>> >>>> Archive: http://www.team.net/pipermail/healeys
>> >>>> http://autox.team.net/archive
>> >>>>
>> >>>> Healeys at autox.team.net <mailto:Healeys at autox.team.net>
>> >>>> http://autox.team.net/mailman/listinfo/healeys
>> >>>>
>> >>>> Unsubscribe/Manage:
>> >>>> http://autox.team.net/mailman/options/healeys/coudesluijs@chello.nl
>> >>>>
>> >>> _______________________________________________
>> >>> Support Team.Net http://www.team.net/donate.html
>> >>> Suggested annual donation  $12.75
>> >>>
>> >>> Archive: http://www.team.net/pipermail/healeys
>> >>> http://autox.team.net/archive
>> >>>
>> >>> Healeys at autox.team.net <mailto:Healeys at autox.team.net>
>> >>> http://autox.team.net/mailman/listinfo/healeys
>> >>>
>> >>> Unsubscribe/Manage:
>> >>> http://autox.team.net/mailman/options/healeys/bspidell@comcast.net
>> >>>
>> >> _______________________________________________
>> >> Support Team.Net http://www.team.net/donate.html
>> >> Suggested annual donation  $12.75
>> >>
>> >> Archive: http://www.team.net/pipermail/healeys 
>> <http://www.team.net/pipermail/healeys >http://autox.team.net/archive
>> >>
>> >> Healeys at autox.team.net <mailto:Healeys at autox.team.net>
>> >> http://autox.team.net/mailman/listinfo/healeys
>> >>
>> >> Unsubscribe/Manage: 
>> http://autox.team.net/mailman/options/healeys/sentenac.rw@gmail.com
>> >>
>>
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation  $12.75
>>
>> Archive: http://www.team.net/pipermail/healeys 
>> <http://www.team.net/pipermail/healeys >http://autox.team.net/archive
>>
>> Healeys at autox.team.net <mailto:Healeys at autox.team.net>
>> http://autox.team.net/mailman/listinfo/healeys
>>
>> Unsubscribe/Manage: 
>> http://autox.team.net/mailman/options/healeys/rrengineer.mike@att.net
>>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20200805/3d4fed34/attachment.htm>