[Healeys] Rear brake adjustment

[Roger Grace]

Yes thank you;  that sounds like a good explanation. As you say it is a
bear of a job and just working up some stamina to tackle it again !
rg

On Mon, Mar 29, 2021 at 10:38 PM Bob Spidell <bspidell at comcast.net> wrote:

> re: "I note that the slave is tight on the back plate. How tight is
> normal floating ?"
>
> I just spent several hours on my back on a greasy floor working on my
> BN2's rear drums. I didn't see any text in the shop manual explaining
> installation; most I found was a pic in the Moss catalog showing that
> the curved spring, with the 'hooks,' should be installed above the
> cylinder (between the cylinder and the handbrake lever). First, I
> installed the flat plate against the backing plate with the spring plate
> on top of it. Not only would the cylinder not move freely--which enables
> the self-energizing aspect of the brakes--but the rubber dust boot had
> nothing to hold it in place. I then reversed the installation; i.e. the
> spring plate was still above the cylinder, but under the flat plate
> (hooks up). This way the cylinder would slide smoothly and easily, which
> makes sense because there is less contact area, but the rubber boot,
> which is beveled on the inner part fit naturally under the flat plate
> and would stay in place when vigorously sliding the cylinder
> back-and-forth. Contact surfaces were lightly greased.
>
> Short answer: the cylinder should slide smoothly and easily; otherwise
> the self-energizing feature could be defeated, and the cylinder could be
> stuck in the expanded position, which could explain your non-retracting
> problem.
>
> Bob
>
>
> On 3/29/2021 3:07 PM, Roger Grace via Healeys wrote:
> > BJ8 ph2.
> > I am Struggling to get consistent results for rear brake shoe adjustment.
> > All part of a project to get handbrake working properly - currently it
> > is almost vertical.
> > Background:
> > New shoes, slaves and springs etc with less than 4k mi. Almost no sign
> > of any wear yet.
> > Handbrake lever clevis pins removed.
> > Steady post adjusted so the peg just touches when brakes are adjusted
> > tight.
> > Then the adjustment set so you can just hear/feel slight brake drag.
> > All OK so far.
> >
> > Here is the problem:
> > When the handbrake lever is pushed with screwdriver or my hand it
> > moves with initial free play then clamps the shoes as it should.
> > However  when released brakes do not fully retract, and shoes bind and
> > not at  the same setting that started off with.
> > Same story with using the hydraulics; seems to hang up, in not quite
> > the off position. Both wheels are the same.
> > Shoes can be "reset"  to original setting by rattling the adjuster
> > back and forth in  the freeplay zone.
> > All looks fine when drum is off and you can see the shoe operation.
> >
> > My thoughts :
> > I observe that the new springs actually touch the inside of the shoes ?
> > Maybe some grease there ? Is this interference normal ?
> > Is it possible to incorrectly assemble the shoes/springs ?
> > See photo of RR.
> > I note that the slave is tight on the back plate. How tight is normal
> > floating ?
> > Maybe I assembled the slave cylinder clips incorrectly ?
> >
> > All  suggestions appreciated
> > rg
> >
> >
> >
> >
> >
> >
> >
>
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