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Post by mistersocks on Mar 2, 2014 9:09:31 GMT
Hi All,
Well, it seems that being put into everyday use after a 17 year lay up have proved to be too much for my crab.
I think its a possible servo failiure, but I thought I'd run the symptoms past you all first.
The brakes work, the brake pedal is not sinking to the floor, but you have to give the pedal a real hard push to get anything out of the brakes. Also, when applying the brakes with the engine idling, the revs drop and the engine stalls, also the vacuum gauge on the dash drops too. I noticed the two central nuts on the inlet manifold were loose and tightened them hoping that was the cure, but the problem remains...
Any ideas/ suggestions very greatfully received!
Cheers
Rich
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Post by indianajones on Mar 2, 2014 9:11:39 GMT
Are you losing any brake fluid?
When my servo went, my fluid was being gobbled up by the intake manifold and thus I had lots of white smoke and a unhappy engine.
-Andrew
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Post by mistersocks on Mar 2, 2014 10:01:47 GMT
Hi Andrew,
The fluid level has stayed at maximum and I haven't noticed any smoke, I wondered whether the vacuum hose was collapsed but it seems ok?
Cheers
Rich.
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Post by Penguin45 on Mar 2, 2014 19:59:42 GMT
If the diaphragm has gone or there is no vacuum to the servo, you'll get no assistance but you won't necessarily lose brake fluid unless there's a failure on the hydraulic side as well. POWERTRACK BRAKES have the rebuild kits for the various servos - if you've got a Powerstop IIB you're in for a bit of a surprise. Norton Servos will do the job for you if you don't fancy it - enquiries@norton-servos.co.uk . Chris. |
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Post by indianajones on Mar 2, 2014 22:52:21 GMT
If you have a Mk. IIB and aren't fussed about keeping it original, A new lockheed servo makes a good replacement for less $$
-Andrew
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Post by Penguin45 on Mar 2, 2014 23:52:48 GMT
True - Indy and I both have them fitted to our cars. Mounting my one involved jigging some of the contents of the engine bay round; Indy has had a bracket made up to suit.
Chris.
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Post by mistersocks on Mar 3, 2014 21:08:15 GMT
Hi All,
Many thanks for the advice, I'll try and find time to get under the bonnet at some point this week and find out what type of servo is fitted. I'm not too fussed as far as originality is concerned, and a quick search on ebay shows lockheed type servos available for around £75. Dependant on the price and the amount of swearing and skinned knuckles involved, I'm leaning towards a new servo rather than rebuilding the original one!
Cheers
Rich
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Post by dave1800 on Mar 3, 2014 23:37:11 GMT
I think Chris and Andrew mean genuine Lockheed servos. For a critical component like this on a car with single line braking, would you want to risk an Ebay copy that comes out of China for a few dollars? Have a look a the Chinese suppliers ex-factory prices - maybe only 5-10 $US. David Hi All, Many thanks for the advice, I'll try and find time to get under the bonnet at some point this week and find out what type of servo is fitted. I'm not too fussed as far as originality is concerned, and a quick search on ebay shows lockheed type servos available for around £75. Dependant on the price and the amount of swearing and skinned knuckles involved, I'm leaning towards a new servo rather than rebuilding the original one! Cheers Rich |
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Post by mistersocks on Mar 10, 2014 21:45:00 GMT
Hello All,
At last there's some sun in the sky and I've got an hours daylight upon returning home from work, so I found some time to do a bit more to the Morris.
Pulled the vacuum hose off the inlet manifold and gave it a suck and stuck it to the inside of my cheek (the cheek of my face by the way...). it stayed stuck there with no noticeable loss of 'suck', does this mean the servo could be ok?
next step was to remove the manifold assembly. amazingly, everything came apart as if it had only been done up yesterday, when removing the manifold, the gasket fell to bits.
my thinking is this - maybe the manifold/gasket was jiggered and sucking in air (i couldnt get the carb set up proper when trying to tune it up and the inside of the xorst was white/grey), so the extra air meant running super lean and no manifold pressure therefore no brakes?
could this make sense?
cheers!
rich.
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Post by Penguin45 on Mar 11, 2014 0:20:58 GMT
I think I'd be tempted to slap a new manifold gasket on and see what happens. Certainly the cheapest place to start! Just out of curiosity, I've popped out to my car and pulled the vacuum hose off the servo. There was a nice "Pheuu!" sort of noise as the vacuum released. The car had been parked up for over 6 hours, so running round the block and pulling the hose off should give you the same result.
Chris.
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Post by mistersocks on Mar 11, 2014 20:56:30 GMT
Thanks for that Chris,
New manifold gasket ordered, and I'll be replacing the hose from the manifold to servo too as its fairly perished. Cant remember any whooshing noises when I removed the hose but looking at the state of the manifold gasket it wouldnt surprise me if there was no vacuum.
Cheers
Rich
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Post by dave1800 on Mar 12, 2014 3:27:44 GMT
There should be a non return valve in the manifold feed to the servo hose. If that is working the pressure shouldn't be able to leak out via the manifold gasket. Another way of checking is to run the engine, switch off and half an hour (or more) later depress the brake pedal and you will hear the "whoosh". After two or more depressions there will be no sound. The hoses were a known cause of problems so a good idea to replace as you are doing. Regards David Thanks for that Chris, New manifold gasket ordered, and I'll be replacing the hose from the manifold to servo too as its fairly perished. Cant remember any whooshing noises when I removed the hose but looking at the state of the manifold gasket it wouldnt surprise me if there was no vacuum. Cheers Rich |
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