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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@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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--0000000000004aeed905bec3d20b
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div>Yes thank you;=C2=A0 that sounds like a good explanat=
ion. As you say it is a bear of a job and just working up some stamina to t=
ackle it again !</div><div>rg<br></div></div><br><div class=3D"gmail_quote"=
><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Mar 29, 2021 at 10:38 PM Bob=
Spidell <<a href=3D"mailto:bspidell@comcast.net";>bspidell@comcast.net</=
a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">re=
: "I note that the slave is tight on the back plate. How tight is <br>
normal floating ?"<br>
<br>
I just spent several hours on my back on a greasy floor working on my <br>
BN2's rear drums. I didn't see any text in the shop manual explaini=
ng <br>
installation; most I found was a pic in the Moss catalog showing that <br>
the curved spring, with the 'hooks,' should be installed above the =
<br>
cylinder (between the cylinder and the handbrake lever). First, I <br>
installed the flat plate against the backing plate with the spring plate <b=
r>
on top of it. Not only would the cylinder not move freely--which enables <b=
r>
the self-energizing aspect of the brakes--but the rubber dust boot had <br>
nothing to hold it in place. I then reversed the installation; i.e. the <br=
>
spring plate was still above the cylinder, but under the flat plate <br>
(hooks up). This way the cylinder would slide smoothly and easily, which <b=
r>
makes sense because there is less contact area, but the rubber boot, <br>
which is beveled on the inner part fit naturally under the flat plate <br>
and would stay in place when vigorously sliding the cylinder <br>
back-and-forth. Contact surfaces were lightly greased.<br>
<br>
Short answer: the cylinder should slide smoothly and easily; otherwise <br>
the self-energizing feature could be defeated, and the cylinder could be <b=
r>
stuck in the expanded position, which could explain your non-retracting <br=
>
problem.<br>
<br>
Bob<br>
<br>
<br>
On 3/29/2021 3:07 PM, Roger Grace via Healeys wrote:<br>
> BJ8 ph2.<br>
> I am Struggling to get consistent results for rear brake shoe adjustme=
nt.<br>
> All part of a project to get handbrake working properly - currently it=
<br>
> is almost vertical.<br>
> Background:<br>
> New shoes, slaves and springs etc with less than 4k mi. Almost no sign=
<br>
> of any wear yet.<br>
> Handbrake lever clevis pins removed.<br>
> Steady post adjusted so the peg just touches when brakes are adjusted =
<br>
> tight.<br>
> Then the adjustment set so you can just hear/feel slight brake drag.<b=
r>
> All OK so far.<br>
><br>
> Here is the problem:<br>
> When the handbrake lever is pushed with screwdriver or my hand it <br>
> moves with initial free play then clamps the shoes as it should.=C2=A0=
<br>
> However=C2=A0 when released brakes do not fully retract, and shoes bin=
d and <br>
> not at=C2=A0 the same setting that started off with.<br>
> Same story with using the hydraulics; seems to hang up, in not quite <=
br>
> the off position. Both wheels are the same.<br>
> Shoes can be "reset"=C2=A0 to original setting by rattling t=
he adjuster <br>
> back and forth in=C2=A0 the freeplay zone.<br>
> All looks fine when drum is off and you can see the shoe operation.<br=
>
><br>
> My thoughts :<br>
> I observe that the new springs actually touch the inside of the shoes =
?<br>
> Maybe some grease there ? Is this interference normal ?<br>
> Is it possible to incorrectly assemble the shoes/springs ?<br>
> See photo of RR.<br>
> I note that the slave is tight on the back plate. How tight is normal =
<br>
> floating ?<br>
> Maybe I assembled the slave cylinder clips incorrectly ?<br>
><br>
> All=C2=A0 suggestions appreciated<br>
> rg<br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
<br>
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