[T3] I want to change my brake fluid it's been a while? 73 SB

William J catnine09 at dslextreme.com
Sun May 15 19:09:02 PDT 2016


----- Original Message ----- 
From: "William J" <catnine09 at dslextreme.com>
To: <type3 at vwtype3.org>
Sent: Sunday, May 15, 2016 6:51 PM
Subject: Re: [T3] I want to change my brake fluid it's been a while? 73 SB

 Sorry for the double post I didn't get the first one right.

> Instead of pumping the pedal to get the old fluid out is it possible just 
> to crack the RF lower bleeder with the top one closed and keep adding 
> fluid to the reservoir so no air enters the system then close the  bottom 
> open the top so both pistons fill ? Won't that drain all the old fluid out 
> or is there some reason the master won't allow this without pumping? Then 
> I can move to the LF and then R rear and then L rear. I just don't feel 
> comfortable pumping and letting air in with the old master and calipers .
>
> I have watched a few videos that show it being done this way and they 
> remove most of the old reservoir fluid and top off new and when the old 
> fuild enters a jar through a hose you can see the old dark fluid , empty 
> the jar and continue on until you see clean fluid coming out.
>
> William
> ----- Original Message ----- 
> From: "Jim Adney" <jadney at VWType3.org>
> To: <type3 at vwtype3.org>
> Sent: Friday, May 13, 2016 2:03 PM
> Subject: Re: [T3] I want to change my brake fluid it's been a while? 73 SB
>
>
>> If you want to get as much old fluid as possible out of the system,
>> you're committed to letting a lot of air in. There's no way around
>> that.
>>
>> Once you've got as much old fluid out as possible, you can just
>> gravity bleed, which works great. Just don't get in a hurry. It's a
>> good way to do this when you're working alone. It gives you plenty of
>> time to make sure the reservoir stays full.
>>
>> I would pump as much out of the regular bleeders as you can, until
>> you suck air into the MC. Then open the bottom bleeders and let the
>> calipers drain. Let them drain while you do something else for a half
>> hour.
>>
>> Then close the bottom bleeders and fill the reservoir. Close the
>> bleeders on the LF, LR, and RR. Watch the RF until fluid starts
>> coming out, then close that valve.
>>
>> Open the LF and watch it. Check the reservoir.
>>
>> Repeat for the rears.
>>
>> Check for good pedal. If it's still soft, pump a few times, to drive
>> bubbles to the top of the wheels, and let more fluid/air out at each
>> wheel.
>>
>> On 13 May 2016 at 11:24, William J wrote:
>>
>>> Just so I've got this right. If I remove most of the fluid from the
>>> reservoir then strarting with the right front caliper I should open the
>>> lower bleeder  and this will gravity drain all the fluid from both 
>>> pistons
>>> or do I need to also open the top bleeder and of course maintain the
>>> reservoir level ? Then do the left front then R rear the L rear each one 
>>> at
>>> a time? So if I keep the reservoir full this will not only flush or 
>>> drain
>>> out all the old fluid and also not introduce air into the system ? I'm
>>> calling this drain/ gravity bleed , I have the time. If for some reason 
>>> air
>>> is introduced then I go to the hose and jar method ? I have read that 
>>> air
>>> can be pulled in through the bleeder screw threads or is this only an 
>>> issue
>>> if one backs out the bleeders more than cracking them say a 1/4 or 1/2 
>>> turn.
>>>
>>> William
>>> ----- Original Message ----- 
>>> From: "Dave Hall" <dave at hallvw.clara.co.uk>
>>> To: <type3 at vwtype3.org>
>>> Sent: Friday, May 13, 2016 5:30 AM
>>> Subject: Re: [T3] I want to change my brake fluid it's been a while? 73 
>>> SB
>>>
>>>
>>> > I've a simple piece of rubber pressure tubing that has a screw in the
>>> > lower
>>> > end, and a slit cut with a Stanley knife (eg) which fits on a bleed 
>>> > screw
>>> > and acts as a one way valve.  Press on the pedal and the fluid squirts 
>>> > out
>>> > of the slit, without allowing air back in.  Good for single-handed
>>> > bleeding,
>>> > but rather slow for changing fluid.
>>> >
>>> > Dave
>>> > UK VW Type 3&4 Club
>>> > ===================
>>> >
>>> >
>>> >
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>>
>>
>> -- 
>> *******************************
>> Jim Adney, jadney at vwtype3.org
>> Madison, Wisconsin, USA
>> *******************************
>>
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>
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