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JonandJude
United Kingdom
84 Posts |
 Posted - 16 May 2016 : 09:03:28
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So had a new one yesterday, while out for a drive the brakes would stay on after pressing the pedal and would need a couple of sharp jabs to get them to come off again.
Bit awkward at times and the most bizarre feeling to take your foot off the pedal but the car carries on braking.
It's not the calipers sticking and the pedal is free on the shaft so assuming it must be master cylinder or servo. Is there a non-return valve anywhere?
Is there anything I can do to find out who is the culprit before I start taking things apart?
1972 Rapier H120
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pruyter
Netherlands
323 Posts |
Posted - 16 May 2016 : 09:45:21
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When the brakes are sticking and the car is standing still, you can pull of the vacuum hose which is connected to the servo. When the brakes are releasing you can be sure the servo is the culprit.
Regards,
Peter |
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JonandJude
United Kingdom
84 Posts |
Posted - 16 May 2016 : 12:39:47
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| Yep, disconnected the servo and the problem had gone, I think. Also seems it wasn't working anyway. |
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JPSH120
United Kingdom
1191 Posts |
Posted - 16 May 2016 : 13:35:26
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Interesting. I have been experiencing similar symptoms, albeit very mild. My thoughts were the servo and mine isn't very old.
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pruyter
Netherlands
323 Posts |
Posted - 16 May 2016 : 20:51:05
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Regarding the Lockheed servo there is a piston under the air valve that can be stucked. What I did when I experienced the brakes hanging on was taking this piston out, which takes no more than 10 minutes,and then smear some brake grease on the piston. Put the piston back and all is well again.
Regards,
Peter |
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JonandJude
United Kingdom
84 Posts |
Posted - 17 May 2016 : 07:45:20
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Took the car out again for a good hours drive and no more holding on.
As it doesn't appear the servo ever worked I don't know how the breakes feel on a servo car but I'm perfectly happy with the way it feels at the moment. The stopping power is perfectly sufficient and I don't need to be heavy with the pedal.
Maybe it's more of an issue if your changing between a modern car and a Rapier but my other vehicle is a series 3 Landover so lead boots are a nessecity.
1972 Rapier H120
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bigt80
United Kingdom
1052 Posts |
Posted - 22 May 2016 : 16:19:20
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Late reply here, with brakes sticking on it is usually the servo rather than the m/cyl which tends to have the opposite effect when it fails!
Seems like you're happy enough with them as they are & I think it is all relative to what your other transport is as to how the car drives, esp with occasional use.
Good tip from 'Pruyter' there.
Jason, I hope you've not got one of those Chinese imports  .
Cheers. G. |
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JPSH120
United Kingdom
1191 Posts |
Posted - 22 May 2016 : 20:14:17
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Haha, no it's not a Chinese import!
It cost me a pretty penny from Malcolm Anderson as I needed one in a hurry. That's a few years ago now and the lack of use could well be the problem. At least there are cheaper options now if I'm unable to free up the air valve.
Would still like to get one that is the correct colour 
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Edited by - JPSH120 on 22 May 2016 20:15:50 |
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JPSH120
United Kingdom
1191 Posts |
Posted - 26 Jul 2016 : 20:11:50
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A quick update from me. I had to replace the brake light switch on mine as it was not working on anything less than maximum pedal pressure. Curiously, now I've changed the switch there is no longer a delay in releasing the brakes.
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JonandJude
United Kingdom
84 Posts |
Posted - 26 Jul 2016 : 22:15:33
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| Curiouser and curiouser |
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pruyter
Netherlands
323 Posts |
Posted - 26 Jul 2016 : 22:26:54
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The chance is there that the delay is going to return, because the brake light switches that are sold nowadays in a nice green box refering to Lucas are in fact from a terrible Chinese quality sort of switch. Don't ask me how I know this!
Regards,
Peter |
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JPSH120
United Kingdom
1191 Posts |
Posted - 27 Jul 2016 : 11:16:42
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quote:
Originally posted by pruyter
The chance is there that the delay is going to return, because the brake light switches that are sold nowadays in a nice green box refering to Lucas are in fact from a terrible Chinese quality sort of switch. Don't ask me how I know this!
Regards,
Peter
You're probably right but it was all I could get hold of in the time available, at least I have working brake lights now!
Speedy spares list them, wonder if theirs are any better?
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New auto brake feature
