spongy brakes

[Milanoverde]

While out driving yesterday, my brakes went awry. Hit the brakes and the pedal went down much further than it should and in addition felt spongy. I could pump them and the pedal came back at least partially. Checked the MC, it is full. No sign of brake fluid under the car. Any ideas? It is an '80 tr7. Thanks, tony

[willywonka]

It looks like the seals in the master cylinder are bypassing, hence no fluid loss.



All the Gear, no idea

[Jolyon39]

Sounds exactly like a master cylinder to me.

Jolyon

[jclay (RIP 2018)]

Sound like what happened to me! Bleed the back brakes until you get clean fluid out of the back. It was just built up air from getting the brakes too hot!

Cheaper than getting a new Master to find out that it was just air.

Clay

[url="http://web.me.com/jclaythompson/Site/Welcome.html"]My Triumph Site[/url], [url="http://web.me.com/jclaythompson/Technical"]Technical Stuff[/url], [url="https://public.me.com/jclaythompson"]My Public Folder[/url], [url="http://web.me.com/jclaythompson/tr8/Welcome.html"]My TR8 Site[/url]

[Milanoverde]

Thanks JClay. I like your suggestion much better!

[FI Spyder]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by jclay</i>


Cheaper than getting a new Master to find out that it was just air.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

Yep but not by much.

http://www.bpnorthwest.com/.sc/ms/dd/TR7-TR8--Braking%20Components/8084/Brake%20Master%20Cylinder%20Kit%20MGB%2075%20to%2080%2C%20TR7%20TR8

Always best to do cheapest first though.



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