[Spridgets] Brake Bleed

Sun Jan 16 15:14:38 MST 2022

New stainless steel braided hoses on the calipers.  Same old 20 year old
hose in the rear.  Something to think about I guess.
Mike M

On Sun, Jan 16, 2022, 1:48 PM Rick Fisk via Spridgets <
spridgets at autox.team.net> wrote:

> Daniel - think hoses.  😁
>
> On Jan 16, 2022, at 4:46 PM, Rick Fisk <refisk at chartermi.net> wrote:
>
> 
> In my experience the usual cause is rear brakes not adjusted tight
> enough.  The first press of the pedal moves the shoes away from their
> resting position, but not all the way to the drum.   A quick second press
> of the pedal moves them even further.  A quick third press of the pedal may
> put the shoes in contact with the drum and the pedal feels hard.  Release
> the pedal and the shoes move all the way back to their initial resting
> position and you start all over again when you want to use the brakes.  No
> air in the system and the pedal feels great once you get the shoes all the
> way out to the drum.
>
> Rick
>
> On Jan 16, 2022, at 4:32 PM, Weslake1330 via Spridgets <
> spridgets at autox.team.net> wrote:
>
> 
> I don't mind friendly disagreements - its one of the best ways to learn!
> Ok.  I guess hard is a relative term.  Assuming I'm wrong, and there is no
> air in the system what is causing the pedal to need to pump up?
>
> On Sun, 16 Jan 2022 at 10:17, GUY DAY <grday at btinternet.com> wrote:
>
>> Sorry Wes,
>>
>> I've got to disagree with part of your last comment. <snip> If the pedal
>> pumps up hard and absolutely stays hard there is still air in the
>> system.<end snip>. If the pedal stays hard there is NO air (or leaks) in
>> the system. If there is air in the system then the pedal will feel
>> 'springy' or 'bouncy'. Air will always act as a spring within a fluid
>> system and anything akin to a discerning foot will feel it.
>>
>>
>> Fully agree with the rest of your post - and I've had people saying the
>> brakes are fine as the pedal very slowly sinks to the floor!. It feels firm
>> but the pedal sinks over a minute or so. (If no fluid is lost there is a
>> seal leak in the m/cyl).
>>
>>
>>
>> Stay well,
>>
>>
>> Guy R Day
>>
>>
>>
>> ------ Original Message ------
>> From: "Weslake1330 via Spridgets" <spridgets at autox.team.net>
>> To: "Michael MacLean" <springer.mike51 at gmail.com>
>> Cc: "Spridgets" <spridgets at autox.team.net>
>> Sent: Sunday, 16 Jan, 22 At 09:22
>> Subject: Re: [Spridgets] Brake Bleed
>>
>> Air can get trapped in a solid brake line and not easily find its way to
>> the slave to be bled out. I have heard some people say that after driving
>> the car a few times the air moves about and then the system bleeds better.
>> On my Sprite I've sometimes left it a week and then come back to it and
>> re-bled it with a better result. I'm also always resigned to using massive
>> amount of fluid and pumping it all through. I do have s/s easy bleed
>> nipples but still use a basic bleeding tool as well.
>>
>> If the pedal pumps up hard and absolutely stays hard there is still air
>> in the system. If it pumps up hard but won't stay absolutely hard -
>> something isn't quite seating correcting or you have some other sort of
>> leak.
>>
>> Regards
>>
>>
>> Daniel
>>
>> On Sun, 16 Jan 2022 at 08:49, Michael MacLean via Spridgets <
>> spridgets at autox.team.net> wrote:
>>
>>> You're right. I got it backasswards. New master with twin 3/4" bores.
>>> The old one was 7/8" in one bore for the drum brakes and 3/4" bore for the
>>> Datsun clutch in the other. Rear is adjusted as best as possible. Pity you
>>> can't get shoes arced anymore for full contact with the drum. I will try to
>>> wear them in and keep adjusting to see if that helps.
>>> Mike
>>>
>>> On Sat, Jan 15, 2022 at 9:20 PM Rick Fisk <refisk at chartermi.net> wrote:
>>>
>>>> Hi Mike,
>>>>
>>>> Front disc brakes should have a 3/4" master. Make sure the rear drums
>>>> are adjusted properly. If the rears aren't adjusted properly you quite
>>>> often will have to pump the pedal to get it firm.
>>>>
>>>> Rick
>>>>
>>>> > On Jan 15, 2022, at 11:22 PM, Michael MacLean via Spridgets <
>>>> spridgets at autox.team.net> wrote:
>>>> >
>>>> > 
>>>> > The front drum brakes and master cylinder on my Bugeye were recently
>>>> swapped out for disc brakes. The old master was 3/4" bore with a 7/8"
>>>> sleeve for the Datsun clutch. The new master is 7/8" in both bores to
>>>> actuate the calipers correctly. Installation went without a hitch and the
>>>> car was bled multiple times, but for some reason the brake pedal goes down
>>>> aways before it works. You can actually pump the pedal up a bit. We can't
>>>> understand it. There are no leaks and it was bled properly, butt it acts
>>>> like there is still air in the system. Any ideas?
>>>> > Mike MacLean
>>>> > ------------------------
>>>> >
>>>> > spridgets at autox.team.net
>>>> >
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>>>> ------------------------
>>>
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>> ------------------------------
>> ------------------------
>>
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>> ------------------------
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