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Either the piston is stuck or fluid isn't transferring, the square section=
o-ring seal between the halves is possibly swollen & the port is blocked.I=
directly violate the instructions in the book, I split them when rebuildin=
g, & new calipers are so cheap nowadays replacement cost is less than rebui=
lding them.Another point is that crap builds up in the piston seal groove, =
& if it isn't all removed the seal may be "tight", restricting piston movem=
ent.HTHGlen Efinger
On Friday, August 29, 2025 at 08:42:11 AM EDT, Michael Moore via Fot <f=
ot@autox.team.net> wrote: =20
=20
This is for my street TR4,
=20
=C2=A0
=20
I rebuilt the front brake calipers with new seals around the puck and dust =
covers, I did not split them in half. Put them back in, bled the sh** out o=
f them and have no leaks.
=20
=C2=A0
=20
But when I press the brakes, only the inside puck is moving, no movement on=
the outside. My guess is that there is no or very little fluid on the outs=
ide half.
=20
=C2=A0
=20
Is there a trick to getting the fluid on both sides? Do you think that is m=
y problem?
=20
=C2=A0
=20
=C2=A0
=20
Thanks, Mike
=20
=C2=A0
=20
62 TR4, Race car
=20
63 TR4, Street car
=20
=C2=A0
=20
Mike & Becky Moore
=20
6050 Ruhl Road, Fairview, PA 16415
=20
814-323-0698
=20
mmoore@mtmcpafirm.com
=20
=C2=A0
=20
=C2=A0
=20
=C2=A0
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
m
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<html><head></head><body><div class="ydp793eeb12yahoo-style-wrap"
style="font-family:Arial, Helvetica, sans-serif;font-size:16px;"><div></div>
<div dir="ltr" data-setdir="false">Either the piston is stuck or fluid
isn't transferring, the square section o-ring seal between the halves is
possibly swollen & the port is blocked.</div><div dir="ltr"
data-setdir="false">I directly violate the instructions in the book, I split
them when rebuilding, & new calipers are so cheap nowadays replacement cost
is less than rebuilding them.</div><div dir="ltr" data-setdir="false">Another
point is that crap builds up in the piston seal groove, & if it isn't all
removed the seal may be "tight", restricting piston movement.</div><div
dir="ltr" data-setdir="false">HTH</div><div dir="ltr" data-setdir="false">Glen
Efinger</div><div><br></div>
</div><div id="ydp34ef2689yahoo_quoted_6908689599"
class="ydp34ef2689yahoo_quoted"><div class="ydp34ef2689yahoo-style-wrap"
style="font-family:Arial, Helvetica, sans-serif;font-size:16px;">
<div style="font-family:'Helvetica Neue', Helvetica, Arial,
sans-serif;font-size:13px;color:#26282a;">
<div class="ydp34ef2689quoted-text-header">
On Friday, August 29, 2025 at 08:42:11 AM EDT, Michael
Moore via Fot <fot@autox.team.net> wrote:
</div>
</div><div style="font-family:'Helvetica Neue', Helvetica,
Arial, sans-serif;font-size:13px;color:#26282a;border-left: 1px solid
#ccc;padding-left: 8px;margin: 0px 0px 0px 8px"
class="ydp34ef2689inline_reply_quote_container" data-split-quote-node="true">
<div><br></div><div><br></div>
<div><div id="ydp34ef2689yiv2441161558">
<div>
<div class="ydp34ef2689yiv2441161558WordSection1">
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;">This is for my street TR4,</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">I
rebuilt the front brake calipers with new seals around the puck and dust
covers, I did not split them in half. Put them back in, bled the sh** out of
them and have no leaks.</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;">But when I press the brakes, only the inside puck is
moving, no movement on the outside. My guess is that there is no or very little
fluid on the outside half.</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">Is
there a trick to getting the fluid on both sides? Do you think that is my
problem?</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><i><span
style="font-size:11.0pt;color:red;">Thanks, Mike</span></i></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;"> </span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;">62 TR4, Race car</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;">63 TR4, Street car</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;"> </span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;">Mike & Becky Moore</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;">6050 Ruhl Road, Fairview, PA
16415</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;">814-323-0698</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span
style="font-size:11.0pt;color:red;"><a href="mailto:mmoore@mtmcpafirm.com";
rel="nofollow" target="_blank"><span
style="color:#0563C1;">mmoore@mtmcpafirm.com</span></a></span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
<p class="ydp34ef2689yiv2441161558MsoNormal"><span style="font-size:11.0pt;">
</span></p>
</div>
</div>
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