[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.
Slats
----- 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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