Date: Sun, 1 Sep 2019 11:36:34 -0700
Reply-To: Alistair Bell <albell@SHAW.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Alistair Bell <albell@SHAW.CA>
Subject: Re: Pressure bleeding brakes questions
In-Reply-To: <A1C59F3C-3758-47C0-A307-01295B589C8F@NBNet.nb.ca>
Content-Type: text/plain; charset=utf-8
Interesting, bad copy editing at Bentley to add that lever ref to the vanagon manual .
Gonna try using “the club” between pedal and seat. Looks long enough.
Alistair
> On Sep 1, 2019, at 10:40 AM, Roy Nicholl <RNicholl@nbnet.nb.ca> wrote:
>
> I had to go look … the Jetta does have a lever on the side - presumably for adjusting the bias between front and rear.
>
>> On 01-Sep-2019, at 14:37, Roy Nicholl <RNicholl@NBNET.NB.CA> wrote:
>>
>> No, I’m sure you’ll fancy something out of aluminium.
>>
>> BTW: I don’t think any of our six VWs have lever on the proportioning valve, but I haven’t had cause to crawl under the wife’s Jetta yet.
>>
>>
>>> On 01-Sep-2019, at 14:30, Alistair Bell <albell@SHAW.CA> wrote:
>>>
>>> I’ll give it a go Roy . The “German Bentley “ was the only place i had come across that method until your reply.
>>>
>>> But don’t have any hockey sticks to use, don’t tell anyone Roy, I’ll be deported :-)
>>>
>>> Alistair
>>>
>>>> On Sep 1, 2019, at 10:19 AM, Roy Nicholl <RNicholl@nbnet.nb.ca> wrote:
>>>>
>>>> Alistair:
>>>>
>>>> For a couple of decades (or more) I've used a custom-fitted shaft from a Victoriaville stick (the same one I used as cruise-control in the ’66 Westy) to slightly depress the brake pedal when bleeding the brakes (a local VW mechanic - imported from Germany in the 70s - recommended this approach years ago.
>>>>
>>>>
>>>>> On 01-Sep-2019, at 13:49, Alistair Bell <albell@SHAW.CA> wrote:
>>>>>
>>>>> Time to flush the brakes, it’s due and an event on last trip made it even more time :-) I might post a description of what happened, but for now I have some questions.
>>>>>
>>>>> I have been using a home made pressure bleeder for years, and it works fine. Nothing complicated, just a garden sprayer modified with pressure gauge and fluid reservoir cap with bulkhead fitting .
>>>>>
>>>>> Some years ago I noticed in one of the German language manuals I have, that they go into more detail on pressure bleeding than the English Bentley. One thing especially intriguing, that is a special tool that goes between the driver’s seat and the brake pedal. It’s just and adjustable bar and it seems the brake pedal is pushed , not full way down, during pressure bleeding.
>>>>>
>>>>> I kinda thought that the passages from the brake mc to the reservoir would be blocked during brake pedal depression and thus preventing the pressurized ( during bleeding ) fluid in reservoir from travelling thru system. Maybe the idea is only partial brake pedal depression?
>>>>>
>>>>> Any thoughts?
>>>>>
>>>>> Another query is from the English Bentley, 47-8. Procedure calls for disconnection of the brake booster vacuum line at the check valve when pressure bleeding. Again I haven’t done that before. And again I don’t know why this should be needed.
>>>>>
>>>>> Same page of Bentley, and I think this is a mistake. Calls for the pressure regulator lever to be pushed towards rear wheels. I’m pretty sure our vans don’t have a lever on the pressure regulator ( the proportioning valve under the van ).
>>>>>
>>>>> Alistair
>>>>
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