[ROVERNET - UK] Brakes dual system

geffandjulie geffandjulie at comcast.net
Fri Apr 28 06:05:32 BST 2006

Perfect descriptoin of my symptoms. Will use your diagnostics. Thanks much!
----- Original Message ----- 
From: "Steven Dibdin" <sdibdin at hotmail.com>
To: <rovernet at lyris.ccdata.com>
Sent: Thursday, April 27, 2006 6:23 AM
Subject: RE: [ROVERNET - UK] Brakes dual system

> Hi Jeff and Julie,
> I've just done a rebuild on both the servos on my 2000TC. After much help 
> and advice from Eric Russell and Ruth Burgess. The symptoms you mentioned 
> sound pretty familiar. Firm/dead pedal feel=no servo effect. Slow release 
> of brakes means the air valve isn't seating properly and letting 
> atmospheric pressure in (effect putting the brakes on with you.).
> Lose of fluid with out an obvious leak could mean its filling the vacuum 
> chamber on the servo. Eric's tip was to pull out the vacuum hose and the 
> check valve on the vacuum chamber and tape a piece of rag on the end of 
> some wire. Insert into the hole and see if it comes out with brake fluid 
> on the rag. This saves you having to take it apart to find out if its 
> leaking. If you do have to at least you can rebuild the servos, the kits 
> are out there, I got mine from Ruth Burgess at ABC
> One question: You said you knocked off the top of the air valve when you 
> where working on the system, did you lose the spring that helps the valve 
> seat? if that's gone it can stop the valve closing reliably. I'm guessing 
> that you have a 3500s with the air valve on the master cylinder? From what 
> I've seen I think the air valves are pretty similar on both the 3500s and 
> the 2000TC except the 2000 has them on the servo units instead of on the 
> cylinder.
> Check out the RCCC website they have a fair amount of stuff on servo 
> rebuilds etc....
> Any way, I hope my ramblings help in some way. It's stuff I've learnt from 
> others on RoverNET to be honest.
> Regards,
> Steven Dibdin
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