[ROVERNET - UK] Bleeding brakes!

Steven Dibdin sdibdin at hotmail.com
Wed May 2 23:14:17 BST 2007


Hi Slats,

I did follow your advice, it was your posting that gave me the idea of 
trying the mity vac.

Thanks,

Steven


>From: "Slatskars" <slatskars at comcast.net>
>Reply-To: rovernet at lyris.ccdata.com
>To: <rovernet at lyris.ccdata.com>
>Subject: Re: [ROVERNET - UK] Bleeding brakes!
>Date: Wed, 2 May 2007 14:18:08 -0700
>
>Hi Steven,
>
>I did mention in an earlier e-mail a couple of weeks ago, that when using 
>the Mity-vac, you had to seal around the threads of the bleeder valve to 
>prevent air from being drawn in at that point. I used grease, but it would 
>probably be a good idea to use teflon tape on the fittings. I ran into this 
>problem when bleeding the brakes on a 74 MGB. On the rear drums, the 
>Mity-vac worked fine, but would not work at all on the front calipers. Kept 
>drawing fluid with bubbles.
>
>Slats
>----- Original Message ----- From: "Steven Dibdin" <sdibdin at hotmail.com>
>To: <rovernet at lyris.ccdata.com>
>Sent: Wednesday, May 02, 2007 1:06 PM
>Subject: Re: [ROVERNET - UK] Bleeding brakes!
>
>
>>Hi Slats,
>>
>>Intreging solution. I'll do some research, it may make sense to have a go 
>>at making one. Thanks for the tip.
>>
>>Regards,
>>
>>Steven
>>
>>
>>>From: "Slatskars" <slatskars at comcast.net>
>>>Reply-To: rovernet at lyris.ccdata.com
>>>To: <rovernet at lyris.ccdata.com>
>>>Subject: Re: [ROVERNET - UK] Bleeding brakes!
>>>Date: Wed, 2 May 2007 12:49:54 -0700
>>>
>>>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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>>
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