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A swollen hose is definitely a possibility and the most likely explanation=
for a single brake hang-up.=C2=A0 Another possibility for the front brakes=
staying engaged is that the tipping valve in the master cylinder is not ge=
tting actuated to relieve residual pressure when the brakes are released.=
=C2=A0 Your comment " she noticed the brake pedal just needed to be touched=
and she would be able to stop" suggests that either the pedal is not retur=
ning fully or the piston in the master cylinder is not returning sufficient=
ly to engage the tipping valve.=C2=A0=20
The tipping valve opens the passage between the front brake circuit and the=
reservoir.=C2=A0 As the fluid in the calipers warms up and expands the exc=
ess volume must vent to the reservoir to prevent the build-up of pressure a=
nd the resulting engagement of the pads. This failure will effect both fron=
t brakes equally.
The rear circuit has a similar device at the very end of the piston.=C2=A0 =
It is the little cup that blocks off the port to the rear reservoir.=C2=A0 =
I've seen one of those become disengaged causing the brakes to self-actuate=
.=C2=A0 This was on a Hearld (single circuit brakes) and cracking a bleeder=
resolved the problem in the short term.
=20
Dave=20
=20
=20
-----Original Message-----
From: Jeff Scarbrough <fishplate@gmail.com>
To: William Pugh <anabil007@comcast.net>
Cc: TR3/6 <triumphs@autox.team.net>
Sent: Fri, May 21, 2021 5:11 am
Subject: Re: [TR] I story...
I didn't see any responses...so here's my thoughts.
1.=C2=A0 This is a typical symptom of swollen brake hoses.=C2=A0 Easy to ch=
eck:
Jack up the car, and see if the wheel spins.=C2=A0 If so, apply the brakes
firmly and check to see if it's tight.=C2=A0 If so, open the bleed screw
and see if it now spins easier.=C2=A0 If so, probably need to investigate
new hoses.
2.=C2=A0 If you didn't have trouble getting the new pads in the calipers,
then the shim probably isn't the problem.
3.=C2=A0 Calipers can also fail.
4.=C2=A0 Is the problem on more than one wheel?=C2=A0 (This should have act=
ually
been first - if it shows up on wheels that don't share a hose, look to
the master cylinder - or a problem with the new parts.)
On Tue, May 18, 2021 at 1:48 PM William Pugh <anabil007@comcast.net> wrote:
>
> This winter we worked on getting the TR3 & TR6 in as good shape as possib=
le
>
> Front and rear pads and liners were installed (new)
> TR6 enjoyed having all the old Hydralic fluid removed and replaced severa=
l other enhancements but I want to stick with the Front Brakes on TR6.
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 After the work was done we followed the Moss i=
nstructions =E2=80=9Cdrive slowly up and down for a while, do not use brake=
s=E2=80=9D=C2=A0 We did that, all seemed well, we slowly began using the br=
akes and all was well.
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 Then we took several short drives =E2=80=9Cavo=
iding hard braking=E2=80=9D=C2=A0 10 miles, 20 miles, 50 miles we are being=
=E2=80=9Cgood=E2=80=9D.
>
> But =E2=80=A6 you knew this was coming =E2=80=A6 Yesterday AB drove to Lo=
di for a meeting with her PEO ladies, first time this year. No problem =E2=
=80=A6 coming through Lockford, CA a Fire Truck came out suddenly and she n=
eeded to get out of the way, pulled to curb, heavy braking. When all clear =
she started returning home 10 miles, no need for brakes, she the caught a S=
toplight for several minutes and she noticed the brake pedal just needed to=
be touched and she would be able to stop=E2=80=A6very worry because before=
the pedal had normal movement.
>
> She drove on home 5 miles and when she entered the garage the front disks=
were SMOKING!
>
> Nothing to do but wait for all to cool down.
>
> I have several pictures Rotor has sand melted on rim, some streaks on fla=
t side. Why???
>
> Well they got to hot =E2=80=A6 yep =E2=80=A6 but why? When we removed the=
new disks, they were backed by a thin shim.=C2=A0 That was on the original=
pads as they grew smaller.=C2=A0 Is it possible that those shims put too m=
uch pressure and caused the serious overheating?=C2=A0 A small mind would l=
ike to know.
>
> I have photos if anyone is interested , all kind looks OK ,,,
>
>
> Thanks
> Bill & AnnaBelle
> Rosey TR6=C2=A0 1970
> Casper TR3=C2=A0 1957 (he is just fine)
>
>
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs http://www.team.net/arch=
ive
>
> Unsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/fishpl=
ate@gmail.com
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
sey@cs.com
------=_Part_1515153_1594106528.1621597066095
Content-Transfer-Encoding: quoted-printable
<div style=3D"color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size=3D"3">A swollen hose is definitely a possibility and the m=
ost likely explanation for a single brake hang-up. Another possibilit=
y for the front brakes staying engaged is that the tipping valve in the mas=
ter cylinder is not getting actuated to relieve residual pressure when the =
brakes are released. Your comment "</font><font size=3D"2"> she notic=
ed the brake pedal just needed to be touched and she would be able to stop"=
<font size=3D"3">suggests that either the pedal is not returning fully or =
the piston in the master cylinder is not returning sufficiently to engage t=
he tipping valve. <br>
</font></font></div>
<div><font size=3D"2"><font size=3D"3"><br>
</font></font></div>
<div><font size=3D"2"><font size=3D"3">The tipping valve opens the passage =
between the front brake circuit and the reservoir. As the fluid in th=
e calipers warms up and expands the excess volume must vent to the reservoi=
r to prevent the build-up of pressure and the resulting engagement of the p=
ads. This failure will effect both front brakes equally.<br>
</font></font></div>
<div><font size=3D"2"><font size=3D"3"><br>
</font></font></div>
<div><font size=3D"2"><font size=3D"3">The rear circuit has a similar devic=
e at the very end of the piston. It is the little cup that blocks off=
the port to the rear reservoir. I've seen one of those become diseng=
aged causing the brakes to self-actuate. This was on a Hearld (single=
circuit brakes) and cracking a bleeder resolved the problem in the short t=
erm.<br>
</font></font></div>
<div> <font size=3D"3"><br>
</font></div>
<div style=3D"clear:both"><font size=3D"3">Dave <br>
</font><br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black"><font=
size=3D"2">-----Original Message-----<br>
From: Jeff Scarbrough <fishplate@gmail.com><br>
To: William Pugh <anabil007@comcast.net><br>
Cc: TR3/6 <triumphs@autox.team.net><br>
Sent: Fri, May 21, 2021 5:11 am<br>
Subject: Re: [TR] I story...<br>
<br>
<div dir=3D"ltr">I didn't see any responses...so here's my thoughts.<br cle=
ar=3D"none"><br clear=3D"none">1. This is a typical symptom of swolle=
n brake hoses. Easy to check:<br clear=3D"none">Jack up the car, and =
see if the wheel spins. If so, apply the brakes<br clear=3D"none">fir=
mly and check to see if it's tight. If so, open the bleed screw<br cl=
ear=3D"none">and see if it now spins easier. If so, probably need to =
investigate<br clear=3D"none">new hoses.<br clear=3D"none"><br clear=3D"non=
e">2. If you didn't have trouble getting the new pads in the calipers=
,<br clear=3D"none">then the shim probably isn't the problem.<br clear=3D"n=
one"><br clear=3D"none">3. Calipers can also fail.<br clear=3D"none">=
<br clear=3D"none">4. Is the problem on more than one wheel? (T=
his should have actually<br clear=3D"none">been first - if it shows up on w=
heels that don't share a hose, look to<br clear=3D"none">the master cylinde=
r - or a problem with the new parts.)<br clear=3D"none"><br clear=3D"none">=
On Tue, May 18, 2021 at 1:48 PM William Pugh <<a shape=3D"rect" ymailto=
=3D"mailto:anabil007@comcast.net"; href=3D"mailto:anabil007@comcast.net";>ana=
bil007@comcast.net</a>> wrote:<br clear=3D"none">><br clear=3D"none">=
> This winter we worked on getting the TR3 & TR6 in as good shape as=
possible<br clear=3D"none">><br clear=3D"none">> Front and rear pads=
and liners were installed (new)<br clear=3D"none">> TR6 enjoyed having =
all the old Hydralic fluid removed and replaced several other enhancements =
but I want to stick with the Front Brakes on TR6.<br clear=3D"none">>&nb=
sp; After the work was done we followed the Moss inst=
ructions =E2=80=9Cdrive slowly up and down for a while, do not use brakes=
=E2=80=9D We did that, all seemed well, we slowly began using the bra=
kes and all was well.<br clear=3D"none">> Th=
en we took several short drives =E2=80=9Cavoiding hard braking=E2=80=9D&nbs=
p; 10 miles, 20 miles, 50 miles we are being =E2=80=9Cgood=E2=80=9D.<br cle=
ar=3D"none">><br clear=3D"none">> But =E2=80=A6 you knew this was com=
ing =E2=80=A6 Yesterday AB drove to Lodi for a meeting with her PEO ladies,=
first time this year. No problem =E2=80=A6 coming through Lockford, CA a F=
ire Truck came out suddenly and she needed to get out of the way, pulled to=
curb, heavy braking. When all clear she started returning home 10 miles, n=
o need for brakes, she the caught a Stoplight for several minutes and she n=
oticed the brake pedal just needed to be touched and she would be able to s=
top=E2=80=A6very worry because before the pedal had normal movement.<br cle=
ar=3D"none">><br clear=3D"none">> She drove on home 5 miles and when =
she entered the garage the front disks were SMOKING!<br clear=3D"none">>=
<br clear=3D"none">> Nothing to do but wait for all to cool down.<br cle=
ar=3D"none">><br clear=3D"none">> I have several pictures Rotor has s=
and melted on rim, some streaks on flat side. Why???<br clear=3D"none">>=
<br clear=3D"none">> Well they got to hot =E2=80=A6 yep =E2=80=A6 but wh=
y? When we removed the new disks, they were backed by a thin shim. Th=
at was on the original pads as they grew smaller. Is it possible that=
those shims put too much pressure and caused the serious overheating? =
; A small mind would like to know.<br clear=3D"none">><br clear=3D"none"=
>> I have photos if anyone is interested , all kind looks OK ,,,<br clea=
r=3D"none">><br clear=3D"none">><br clear=3D"none">> Thanks<br cle=
ar=3D"none">> Bill & AnnaBelle<br clear=3D"none">> Rosey TR6 =
; 1970<br clear=3D"none">> Casper TR3 1957 (he is just fine)<br cl=
ear=3D"none">><br clear=3D"none">><br clear=3D"none">> ** <a shape=
=3D"rect" ymailto=3D"mailto:triumphs@autox.team.net"; href=3D"mailto:triumph=
s@autox.team.net">triumphs@autox.team.net</a> **<br clear=3D"none">><br =
clear=3D"none">> Donate: <a shape=3D"rect" href=3D"http://www.team.net/d=
onate.html" target=3D"_blank">http://www.team.net/donate.html</a><br clear=
=3D"none">> Archive: <a shape=3D"rect" href=3D"http://www.team.net/piper=
mail/triumphs" target=3D"_blank">http://www.team.net/pipermail/triumphs </a=
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t; Unsubscribe/Manage: <a shape=3D"rect" href=3D"http://autox.team.net/mail=
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