[ROVERNET - UK] Bleeding brakes!

Slatskars slatskars at comcast.net
Wed May 2 20:49:54 BST 2007

Just thought that I would mention another way of servicing brakes and 
clutches. That is to use a pressure vessel loaded with brake fluid and force 
it backwards from the wheel or slave cylinders. I had extreme difficult 
bleeding a clutch system once (no check valve) and use this method. Worked 
like a champ. I rented a pressure system from a brake shop for a few hours. 
Keep meaning to make one.

----- Original Message ----- 
From: "Roger.Matheson" <roger.matheson at bigpond.com>
To: <rovernet at lyris.ccdata.com>
Sent: Wednesday, May 02, 2007 6:34 AM
Subject: Re: [ROVERNET - UK] Bleeding brakes!

> Hi Steven,
> When you refer to a mity vac, does this mean a vacume device sucking fluid 
> through from one of the callipers?  I have found air pressure effective. 
> I made up a new cap for the resevoir and connected it to 5 lbs air 
> pressure. Releasing a blead screw allows the compresed air to push the 
> fluid through. Obviosly you need to watch the level of fluid but you can 
> move a lot of fluid quickly with this technique.  The last time I bled a 
> recon servo I connected a resevoir with a little fluid in it with a short 
> pipe above the servo outlet.  Pumping the pedal through full strokes very 
> quickly eliminated air which I could see as bubbles in my dummy resevoir. 
> From what you say it seems that there is still air in the second servo.
> Use spare blead screws in the outlets of the master (same thread)  A solid 
> pedal will confirm the master is OK.  With air out of the servos by the 
> above technique, lack of pedal can only mean air in the lines and in the 
> callipers.  Use the compressed air method, push fliud out of the rear 
> bleader (90% of the contents of the resevoir should be enough to change 
> the total volume in this circuit.  Do the same with the front (furthest 
> from the servos then the front nearest).
> If you still have no pedal then there must be a fault in the seals/bores 
> of the master and or the servos, or there is excessive play betwen the 
> pads and disks.  Are there any leaks or bulging in the flexible pipes at 
> he callipers?  Have you been using fresh fluid each time (fluid used for 
> bleading can contain small air bubbles).  I have not found it necessary to 
> start the engine, or raise the rear.  In relation to previous discussions, 
> the blead screw on the rear is of course lower than the inlet pipe Stand 
> well and trully corrected.
> Cheers Roger
> ----- Original Message ----- 
> From: "Steven Dibdin" <sdibdin at hotmail.com>
> To: <rovernet at lyris.ccdata.com>
> Sent: Wednesday, May 02, 2007 4:14 AM
> Subject: [ROVERNET - UK] Bleeding brakes!
> p://autos.groups.yahoo.com/group/Rover_net/ 

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