Diagram for fitting a duel circuit master cylinder

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Gemmas
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Diagram for fitting a duel circuit master cylinder

Post by Gemmas »

Has anybody got one please


Thanks 😊

type21f
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Re: Diagram for fitting a duel circuit master cylinder

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1965 Type21f
Westfalia Hamburg Type155i 003 viewtopic.php?f=8&t=64012
1965 Devon Caravette, L360 L289 Hammock, Tent, M W Pop
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Peebles 1964 Devon Caravette Gentlux Pop

Gemmas
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Re: Diagram for fitting a duel circuit master cylinder

Post by Gemmas »

Thank you

Gemmas
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Re: Diagram for fitting a duel circuit master cylinder

Post by Gemmas »

Does there have to be 2 brake light switches ? As

type21f
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Re: Diagram for fitting a duel circuit master cylinder

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Nope. I took put in a T with the switch in one of the lines at the master cylinder.. I have a VWjim remote servo as well and belly pan fitted.
Last edited by type21f on Tue Jan 14, 2020 12:25 pm, edited 1 time in total.
1965 Type21f
Westfalia Hamburg Type155i 003 viewtopic.php?f=8&t=64012
1965 Devon Caravette, L360 L289 Hammock, Tent, M W Pop
Image
Peebles 1964 Devon Caravette Gentlux Pop

Gemmas
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Re: Diagram for fitting a duel circuit master cylinder

Post by Gemmas »

There is a T piece in the middle and the rear very confusing

Is it best to remove it ? As left hand rear front go to the rear of the master and the large long one to the front ?

type21f
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Re: Diagram for fitting a duel circuit master cylinder

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Edited above. Essentially you are measuring the increase in pressure at the master cylinder when the pedal is pressed! Then you are measuring a system increase, not the pressure in the front and rear systems
1965 Type21f
Westfalia Hamburg Type155i 003 viewtopic.php?f=8&t=64012
1965 Devon Caravette, L360 L289 Hammock, Tent, M W Pop
Image
Peebles 1964 Devon Caravette Gentlux Pop

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vwJim
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Re: Diagram for fitting a duel circuit master cylinder

Post by vwJim »

Graham you're doing better than me, I don't understand the questions
Supplying quality in house designed items plus parts from SyncLink, Kennedy Clutches, & CB Performance. Also fitting service including modifications & mechanical upgrades.

type21f
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Re: Diagram for fitting a duel circuit master cylinder

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Gemma is asking because she has a dual master cylinder does she have to fit two brake light switches. I am trying to explain I used a T fitting FROM YOU so that the switch was inboard and i could fit my belly pan..
PhotoF*ckit is down or they are holding nonners to ransom so I cannot access my 11244 pictures to find one of my installation.
Lol
Hope you are well! Happy New Decade! Welcome to the roaring twenties!
1965 Type21f
Westfalia Hamburg Type155i 003 viewtopic.php?f=8&t=64012
1965 Devon Caravette, L360 L289 Hammock, Tent, M W Pop
Image
Peebles 1964 Devon Caravette Gentlux Pop

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Who.Me?
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Re: Diagram for fitting a duel circuit master cylinder

Post by Who.Me? »

Gemmas wrote:
Tue Jan 14, 2020 12:22 pm
There is a T piece in the middle and the rear very confusing

Is it best to remove it ? As left hand rear front go to the rear of the master and the large long one to the front ?
This description from the VW Heritage page might help?...
For upto 1966 and 1967 euro spec non servo brakes with a dual master cylinder: The rear brake line and brake light switch are fitted to the front two ports closest to the push rod. You should have two front brake lines, one to each of the left and right front brakes. These fit to the two rear ports on the dual circuit cylinder.
For 1967 US buses non servo brakes with a dual master cylinder: The rear line is fitted to one of the front ports closest to the pushrod. The front line is fitted to one of the rear ports. There are 2 brake light switches one in the front port and one in the rear
For the US-spec setup with two brake switches, two Tees are needed. One Tee goes at the rear and bolts to the transmission horns to split the long line from one of the front ports that serves the rear circuit. A brake switch is fitted in the other front port. A second Tee is used to split the front circuit from one of the rear ports because the other front circuit (rear) port is occupied by a second brake switch. I mounted that second Tee to the rear of the front crossmember when I converted mine.

I didn't know there was any difference between US and Euro spec, but Heritage's page says there was. The Euro-spec version only used one brake switch on on the front ports serving the rear circuit, so both rear ports serving the front circuit are free and plumb direct to each wheel and an extra Tee is not needed.

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