Subject: Re: [Oletrucks] Brake pedal

From: MIQ MILLMAN <[email-masked]>
Date: Sat, 7 Feb 2026 16:25:43 -0800

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Smokey didn't you swap out the master cylinder a couple months ago?  Maybe
you have air in the lines, or need to bench bleed the replacement master
cylinder-- this would cause the pedal to go to the floor.
Hydraulic pressure should push the pedal back up in a boosted system.  I'm
guessing that since you swapped to disc brakes, this would be the case?

That said there is a spring that connects the lever arm to the frame the
link below is for Jim Carter's site:

https://oldchevytrucks.com/meb113.html

  --Miq

On Sat, Feb 7, 2026 at 12:21=E2=80=AFPM Smokey Culver <[email-masked]> =
wrote:

> May be a silly question, but...  I have after-market disc brakes on my
> 1950 3600.  Recently redid the rear ones and all is working well.  But wh=
en
> I press the brake pedal down to stop or slow down, it stays engaged and I
> have to release it with the toe of my boot.  Is there a spring that I
> missed?  Any thoughts?
>
> Thanks!
>
> Smokey Culver
> League City, Texas
> _______________________________________________
>
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> Donate: http://www.team.net/donate.html
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<div dir=3D"ltr">Smokey didn&#39;t you swap out the master cylinder a coupl=
e months ago?=C2=A0 Maybe you have air in the lines, or need to bench bleed=
 the replacement master cylinder-- this would cause the pedal to go to the =
floor.=C2=A0 Hydraulic=C2=A0pressure should push the pedal back up in a boo=
sted system.=C2=A0 I&#39;m guessing that since you swapped to disc brakes, =
this would be the case?<div><br></div><div>That said there is a spring that=
 connects the lever arm to the frame the link below is for Jim Carter&#39;s=
 site:</div><div><br></div><div><a href=3D"https://oldchevytrucks.com/meb11=
3.html">https://oldchevytrucks.com/meb113.html</a></div><div><br></div><div=
>=C2=A0 --Miq</div></div><br><div class=3D"gmail_quote gmail_quote_containe=
r"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, Feb 7, 2026 at 12:21=E2=80=
=AFPM Smokey Culver &lt;<a href=3D"mailto:[email-masked]">smokey@railop=
s.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex"><div class=3D"msg5161620328996728613">

<div>May be a silly question, but...=C2=A0 I have after-market disc brakes =
on my 1950 3600.=C2=A0 Recently redid the rear ones and all is working well=
.=C2=A0 But when I press the brake pedal down to stop or slow down, it stay=
s engaged and I have to release it with the toe of my boot.=C2=A0 Is there =
a spring that I missed?=C2=A0 Any thoughts?<div><br></div><div>Thanks!</div=
><div><br></div><div>Smokey Culver</div><div>League City, Texas</div></div>=
_______________________________________________<br>
<br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
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cks/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.tea=
m.net/mailman/options/oletrucks/[email-masked]</a><br>
</div></blockquote></div>

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_______________________________________________

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From: Xfinity Email <[email-masked]>
Date: Sun, 8 Feb 2026 08:42:08 -0600 (CST)

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Smokey:  I'm replying directly to you because I'm not sure attachments will=
 go through the oletrucks mail list.
=20
As Miq says, there is a pedal return spring, item 4.5970 in the GMC parts m=
anual shown here.  There is also a "brake return spring extension",  item 4=
.5815.  It is just a straight piece of heavy spring wire with a hook bent o=
n both ends.   Both are shown in the Jim Carter link that Miq posted.
=20

> On 02/07/2026 6:25 PM CST MIQ MILLMAN <[email-masked]> wrote:
> =20
> =20
> Smokey didn't you swap out the master cylinder a couple months ago?  Mayb=
e you have air in the lines, or need to bench bleed the replacement master =
cylinder-- this would cause the pedal to go to the floor.  Hydraulic pressu=
re should push the pedal back up in a boosted system.  I'm guessing that si=
nce you swapped to disc brakes, this would be the case?
> =20
> That said there is a spring that connects the lever arm to the frame the =
link below is for Jim Carter's site:
> =20
> =20
>=20
> On Sat, Feb 7, 2026 at 12:21=E2=80=AFPM Smokey Culver <[email-masked]=
 mailto:[email-masked]> wrote:
>=20
> > May be a silly question, but...  I have after-market disc brakes on my =
1950 3600.  Recently redid the rear ones and all is working well.  But when=
 I press the brake pedal down to stop or slow down, it stays engaged and I =
have to release it with the toe of my boot.  Is there a spring that I misse=
d?  Any thoughts?
> > =20
> > =20
> >=20
> > [email-masked] mailto:[email-masked]
> >=20
> > Unsubscribe/Manage: http://autox.team.net/mailman/options/oletrucks/miq=
@bigllama.com
> >=20
>=20
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/oletrucks/bill_=
[email-masked]
>=20

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<!doctype html>
<html>
 <head>=20
  <meta charset=3D"UTF-8">=20
 </head>
 <body>=20
  <div style=3D"font-size: 12pt; font-family: helvetica,arial,sans-serif; c=
olor: #333333;"> <span style=3D"font-family: helvetica; font-size: 12pt;">S=
mokey:&nbsp; I'm replying directly to you because I'm not sure attachments =
will go through the oletrucks mail list.</span>=20
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
    &nbsp;=20
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;"> <span style=3D"font-family: helvet=
ica; font-size: 12pt;">As Miq says, there is a pedal return spring, item 4.=
5970 in the GMC parts manual shown here.&nbsp; There is also a "brake retur=
n spring extension",&nbsp; item 4.5815.&nbsp; It is just a straight piece o=
f heavy spring wire with a hook bent on both ends.&nbsp; &nbsp;Both are sho=
wn in the Jim Carter link that Miq posted.</span>=20
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;">
    &nbsp;=20
  </div>=20
  <div class=3D"default-style" style=3D"font-size: 12pt; font-family: helve=
tica,arial,sans-serif; color: #333333;"> <span style=3D"font-family: helvet=
ica; font-size: 12pt;"><img class=3D"aspect-ratio" style=3D"max-width: 100%=
;" src=3D"cid:[email-masked]" alt=3D""><=
/span>=20
  </div>=20
  <blockquote type=3D"cite">=20
   <div>
     On 02/07/2026 6:25 PM CST MIQ MILLMAN &lt;[email-masked]&gt; wrote:=
=20
   </div>=20
   <div>
     &nbsp;=20
   </div>=20
   <div>
     &nbsp;=20
   </div>=20
   <div dir=3D"ltr">
     Smokey didn't you swap out the master cylinder a couple months ago?&nb=
sp; Maybe you have air in the lines, or need to bench bleed the replacement=
 master cylinder-- this would cause the pedal to go to the floor.&nbsp; Hyd=
raulic&nbsp;pressure should push the pedal back up in a boosted system.&nbs=
p; I'm guessing that since you swapped to disc brakes, this would be the ca=
se?=20
    <div>
      &nbsp;=20
    </div>=20
    <div>
      That said there is a spring that connects the lever arm to the frame =
the link below is for Jim Carter's site:=20
    </div>=20
    <div>
      &nbsp;=20
    </div>=20
    <div> <a href=3D"https://oldchevytrucks.com/meb113.html">https://oldche=
vytrucks.com/meb113.html</a>=20
    </div>=20
    <div>
      &nbsp;=20
    </div>=20
    <div>
      &nbsp; --Miq=20
    </div>=20
   </div>=20
   <br>=20
   <div class=3D"gmail_quote gmail_quote_container">=20
    <div class=3D"gmail_attr" dir=3D"ltr">
      On Sat, Feb 7, 2026 at 12:21=E2=80=AFPM Smokey Culver &lt;<a href=3D"=
mailto:[email-masked]">[email-masked]</a>&gt; wrote:=20
    </div>=20
    <blockquote>=20
     <div class=3D"msg5161620328996728613">=20
      <div>
        May be a silly question, but...&nbsp; I have after-market disc brak=
es on my 1950 3600.&nbsp; Recently redid the rear ones and all is working w=
ell.&nbsp; But when I press the brake pedal down to stop or slow down, it s=
tays engaged and I have to release it with the toe of my boot.&nbsp; Is the=
re a spring that I missed?&nbsp; Any thoughts?=20
       <div>
         &nbsp;=20
       </div>=20
       <div>
         Thanks!=20
       </div>=20
       <div>
         &nbsp;=20
       </div>=20
       <div>
         Smokey Culver=20
       </div>=20
       <div>
         League City, Texas=20
       </div>=20
      </div> _______________________________________________=20
      <br>=20
      <br><a href=3D"mailto:[email-masked]" target=3D"_blank" rel=
=3D"noopener">[email-masked]</a>=20
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ank" rel=3D"noopener">http://www.team.net/donate.html</a>=20
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et=3D"_blank" rel=3D"noopener">http://www.team.net/pipermail/oletrucks</a>=
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   <br>=20
   <br>[email-masked]=20
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