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.Â
> 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"Â 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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