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Anon
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servo unit
getting the old bird ready(VAN) for next lot of meets  having trouble with battery old and knackered (bit like me) getting a new one, but I have suspicions regarding my server unit, could hear air leaking when depressing brakes so got a new rubber for where the unit fits the master cylinder but then battery gave up the ghost on trying to restart even when charged so unable to build up any pressure in the unit, once i get the battery fitted and engine started i will reverse out my drive and test brakes(off road) to see if the servo works? if not where do i get a replacment and will it be difficult get out and back in again. was thinking if i move the master cylinder away without removing brake pipes could i get away with bleeding the brakes?
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 Tue 14 Feb 2012 @ 15:06
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Anon
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Servo can be replaced as you describe: master cylinder can be eased away for enough clearance without loosening brake pipe unions.
Problem may be finding a servo in good condition. However, the master cylinder push rod seal (the one that you've replaced) usually is the culprit when air leakage can be heard.
If the new seal has been installed using castor oil grease (e.g. Girling Red Rubber grease) as lubricant particularly on the master cylinder push rod then cross your fingers ... 
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Tue 14 Feb 2012 @ 16:07
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Anon
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Thanks for that Phil, fingers crossed 
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Tue 14 Feb 2012 @ 23:24
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Anon
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well as mickyboy said "if it wasn't for bad luck I wouldn't have any" engine fired up and running fine but no brakes, pump the brakes till feeling a bit of pressure, stop, press again nothing. So survo is No1 suspect. Any one got one knocking about?  
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Wed 15 Feb 2012 @ 15:54
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Anon
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No brakes as in pedal going to the floor is the hydraulics: even if the servo isn't working there's still a direct mechanical link through the servo & the brakes will work but requiring more pedal effort.
Bleed & adjust the brakes before condemning the servo. What you're going for is the pedal feeling hard with minimal play without the engine running.
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Wed 15 Feb 2012 @ 17:02
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Anon
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servo/mastercylinder
Have one here but it may already be sold if they do not get back to me in next couple of days will offer it to you if you are not sorted
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Wed 15 Feb 2012 @ 17:02
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Anon
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One way to test a servo is with the engine turned OFF pump the brake pedal to use up any remaining vacumm, then push the brake pedal down and keep it down as you start the engine, if the servo is working as it regains vacumm the brake pedal will depress further.
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Thu 16 Feb 2012 @ 01:19
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Anon
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MANTAMAN wrote:
One way to test a servo is with the engine turned OFF pump the brake pedal to use up any remaining vacumm, then push the brake pedal down and keep it down as you start the engine, if the servo is working as it regains vacumm the brake pedal will depress further.
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Thu 16 Feb 2012 @ 21:37
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Anon
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got some further advice regarding the servo, told to take the vacuume hose valve out and change it, well took it out and tried to get another, hopeless every car spare out let and a couple of garages just smiled or looked surprised said try the internet??? any way no joy so put it back after blowing and sucking at the valve seemed ok so put it back. and guess what brakes seamed better??? took the old girl (VAN) round the block (Live on a hill) well im still here so strangly it seams ok.....keep my eye on her for a bit longer
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Sat 18 Feb 2012 @ 17:27
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