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Author Topic: Locked Brakes.  (Read 3239 times)

Sleek Lemur

  • Guest
Locked Brakes.
« on: June 05, 2017, 09:12:59 »
Hi everyone, I suddenly got a really hard brake pedal and all wheels locked. Then the pedal travels halfway down. Brake master cylinder I'm thinking?
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ja17

  • Full Member
  • Platinum
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  • USA, OH, Blacklick
  • Posts: 7414
Re: Locked Brakes.
« Reply #1 on: June 05, 2017, 14:57:50 »
Could also be the booster ?
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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

ejboyd5

  • Associate Member
  • Gold
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  • Southold, NY
  • Posts: 510
Re: Locked Brakes.
« Reply #2 on: June 05, 2017, 17:40:00 »
Disconnect vacuum supply hose from the brake booster to see if brakes release.  Open a brake bleeder valve to see if brakes release.  Report back on progress.
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Jowe

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  • Sweden, Västra Götaland, Gothenburg
  • Posts: 280
Re: Locked Brakes.
« Reply #3 on: June 05, 2017, 17:54:12 »
Also check the lever #33 on this picture https://www.niemoeller.de/en/w113/w113/B044/424/ if it is stucked. This happened to me once. At first, I thought it was the master cylinder but then found the lever was stucked in the lower end. Clean and grease...
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Johan
04/1964 230SL, European, manual 4-sp, power steering, 050/050 white, black leather, Blaupunkt (SOLD)

Sleek Lemur

  • Guest
Re: Locked Brakes.
« Reply #4 on: June 06, 2017, 08:22:28 »
Thanks to all! Have ordered a master cylinder in any case, as I only visit the car every fortnight. Will report back. Any other ideas gratefully received !
« Last Edit: June 07, 2017, 14:28:56 by Sleek Lemur »
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Sleek Lemur

  • Guest
Re: Locked Brakes.
« Reply #5 on: June 27, 2017, 12:54:30 »
Well, I returned to the car and all was well. No one mentioned to me that these cars can self-cure ! I have changed the master cylinder in any case and lubed the joint as suggested by Jowe. When the period of time we Brits laughingly refer to as summer is over, am going to send the calipers off for rebuild. £75 each sounds good value. Recommended to me by a member.
http://www.brakecaliperspecialists.uk/
« Last Edit: July 14, 2017, 12:21:30 by Sleek Lemur »
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