Date: Sun, 1 Sep 2019 14:37:00 -0300
Reply-To: Roy Nicholl <RNicholl@NBNET.NB.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Roy Nicholl <RNicholl@NBNET.NB.CA>
Subject: Re: Pressure bleeding brakes questions
In-Reply-To: <943E0F0F-221D-462C-BFC2-EF677D3E5576@shaw.ca>
Content-Type: text/plain; charset=utf-8
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
>>
| 
