Fitting Brake Master cylinder
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- itchyfeet
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Fitting Brake Master cylinder
Never fitted one before.
Any pointers so I don't make school boy errors gratefully received
P1080926 by Paul_Barr, on Flickr
Any pointers so I don't make school boy errors gratefully received
P1080926 by Paul_Barr, on Flickr
Last edited by itchyfeet on 26 Dec 2017, 16:42, edited 2 times in total.
- captain Byrne
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Re: Any tips on fitting this?
Yes.. make sure you fill it with brake fluid first so it's well primed. The rest is pretty straightforward, have plenty of rags knocking around to wipe up inevitable spillages. Other than that it's just a straight swap.
Obviously bleed the system as you'll no doubt know.
Obviously bleed the system as you'll no doubt know.
1983 LHD Westfalia poptop 1.9 DG petrol.
- bigbadbob76
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Re: Any tips on fitting this?
Never done one on a T25 but done a couple on cars and it's pretty straightforward.
(except on the wife's old renault, i had to do it through the pedal plate cos it was hidden behind the engine. )
obviously you want to drain the level down a bit first so you don't get fluid everywhere, the fluid attacks paint something hellish.
Don't drain down any more than you have to or it makes bleding the system more difficult. just down to below the outlets is good.
You'll get some drips anyway so covering things up in that area is worthwhile.
(except on the wife's old renault, i had to do it through the pedal plate cos it was hidden behind the engine. )
obviously you want to drain the level down a bit first so you don't get fluid everywhere, the fluid attacks paint something hellish.
Don't drain down any more than you have to or it makes bleding the system more difficult. just down to below the outlets is good.
You'll get some drips anyway so covering things up in that area is worthwhile.
'86 1.9 DG, 4 spd, tintop, camper conversion.
Split case club member.
Split case club member.
- nevill3
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Re: Any tips on fitting this?
I remember doing mine on an early (1983) 1.6D and found that there was an extra hole in the new one compared to the one that was on. ( It is for an extra "brake failure sensor??) I couldn't get a blank for it so I just inserted another brake switch sensor as a bodge!
- volks_womble
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Re: Any tips on fitting this?
It's not a bodge... the US models have 2 brake light switches in case of failure. There is an additional socket on the loom for a second bake light switch...
What I would say is - do not over tighten the brake light switch, as it splits the boss (and is why I now know how to change the master cylinder...)
What I would say is - do not over tighten the brake light switch, as it splits the boss (and is why I now know how to change the master cylinder...)
1989 1.9TDI (AFN) California
1990 2.1MV Syncro Atlantic
1990 2.1MV Syncro Atlantic
- itchyfeet
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Re: Any tips on fitting this?
Thanks for the tips
- slowcoach
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Re: Any tips on fitting this?
Oh! Makes sense now. Mine has two sensors connected and is an oz model. Three pin switches too, which confused brickwerks at the timevolks_womble wrote:It's not a bodge... the US models have 2 brake light switches in case of failure. There is an additional socket on the loom for a second bake light switch...
What I would say is - do not over tighten the brake light switch, as it splits the boss (and is why I now know how to change the master cylinder...)
===================
1984 TRAKKA Conversion Subaru EJ20 5 Speed
1984 TRAKKA Conversion Subaru EJ20 5 Speed
- itchyfeet
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Re: Any tips on fitting this?
volks_womble wrote:It's not a bodge... the US models have 2 brake light switches in case of failure. There is an additional socket on the loom for a second bake light switch...
What I would say is - do not over tighten the brake light switch, as it splits the boss (and is why I now know how to change the master cylinder...)
not just us models, my late vans both have two switches
P1060232 by Paul_Barr, on Flickr
- itchyfeet
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Re: Fitting Brake Master cylinder
Fitted this today, pics as usual
clocks off and check the old one looks like the new one before removing it, had wrong parts before
P1090096 by Paul_Barr, on Flickr
top off and filter out
P1090102 by Paul_Barr, on Flickr
syphon off the fluid
P1090101 by Paul_Barr, on Flickr
I could not believe the black dirt at the bottom
P1090104 by Paul_Barr, on Flickr
clutch master cylinder feed off
P1090105 by Paul_Barr, on Flickr
goes to clutch master here, that will need bleeding later too.
P1090099 by Paul_Barr, on Flickr
brake switch connections off and then 11mm spanner removed1st brake pipe, bit of tube on so nothing gets in
P1090107 by Paul_Barr, on Flickr
then the other brake pipe off
P1090108 by Paul_Barr, on Flickr
then you can release 2x m8 nuts
P1090109 by Paul_Barr, on Flickr
and it comes off
P1090110 by Paul_Barr, on Flickr
clocks off and check the old one looks like the new one before removing it, had wrong parts before
P1090096 by Paul_Barr, on Flickr
top off and filter out
P1090102 by Paul_Barr, on Flickr
syphon off the fluid
P1090101 by Paul_Barr, on Flickr
I could not believe the black dirt at the bottom
P1090104 by Paul_Barr, on Flickr
clutch master cylinder feed off
P1090105 by Paul_Barr, on Flickr
goes to clutch master here, that will need bleeding later too.
P1090099 by Paul_Barr, on Flickr
brake switch connections off and then 11mm spanner removed1st brake pipe, bit of tube on so nothing gets in
P1090107 by Paul_Barr, on Flickr
then the other brake pipe off
P1090108 by Paul_Barr, on Flickr
then you can release 2x m8 nuts
P1090109 by Paul_Barr, on Flickr
and it comes off
P1090110 by Paul_Barr, on Flickr
- itchyfeet
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Re: Fitting Brake Master cylinder
Pulled the reservoir off, best wear goggles it went suddenly and sprayed me with brake fluid
plugged holes, added some fluid and shook it to release the dirt
P1090112 by Paul_Barr, on Flickr
refitted clean tank to new cylinder, swapped switches over, these are tapered thread so don't want to be silly tight.
P1090114 by Paul_Barr, on Flickr
refitted it and filled reservoir
I didn't fill the cylinder I wasn't sure how to without it pouring out all over the dash
P1090116 by Paul_Barr, on Flickr
pressure bled kit on, tyre down t 15psi
P1090117 by Paul_Barr, on Flickr
went round once but air was still inside, so I went around again but this time I pressed the pedal while it was bleeding, then bled the clutch and finally went around one last time.
each fill of the pressure bleed bottle is 0.5 litres, best not to let it run out or you get lots of air bubbles, stop just before release tyre pressure and refill.
I put 1.5 litres through.
P1090118 by Paul_Barr, on Flickr
refitted clock and test drove it, seems fine now
plugged holes, added some fluid and shook it to release the dirt
P1090112 by Paul_Barr, on Flickr
refitted clean tank to new cylinder, swapped switches over, these are tapered thread so don't want to be silly tight.
P1090114 by Paul_Barr, on Flickr
refitted it and filled reservoir
I didn't fill the cylinder I wasn't sure how to without it pouring out all over the dash
P1090116 by Paul_Barr, on Flickr
pressure bled kit on, tyre down t 15psi
P1090117 by Paul_Barr, on Flickr
went round once but air was still inside, so I went around again but this time I pressed the pedal while it was bleeding, then bled the clutch and finally went around one last time.
each fill of the pressure bleed bottle is 0.5 litres, best not to let it run out or you get lots of air bubbles, stop just before release tyre pressure and refill.
I put 1.5 litres through.
P1090118 by Paul_Barr, on Flickr
refitted clock and test drove it, seems fine now
Last edited by itchyfeet on 26 Dec 2017, 20:48, edited 1 time in total.
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Re: Fitting Brake Master cylinder
Itchy
Thanks for that, a really good clear explanation.
Thanks for that, a really good clear explanation.
1.9D (AEF) pop-top. Aaaaahhhhh........that's better.
- Oldiebut goodie
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Re: Fitting Brake Master cylinder
While you were there, did you happen to notice where the fluid level connector drops down to when it falls down? Can't find mine for love nor money after last fluid change!
1.6D 2019 VW T-Cross
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
- itchyfeet
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Re: Fitting Brake Master cylinder
Oldiebut goodie wrote:While you were there, did you happen to notice where the fluid level connector drops down to when it falls down? Can't find mine for love nor money after last fluid change!
where it ends up is any bodies guess but this is the cable, may help to find it?
level sensor cable by Paul_Barr, on Flickr
- itchyfeet
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Re: Fitting Brake Master cylinder
colinthefox wrote:Itchy
Thanks for that, a really good clear explanation.
Thanks for he encouragement
- Oldiebut goodie
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Re: Fitting Brake Master cylinder
Thanks -I am very wary of pulling on just any cable in there given how delicate the wiring is. Knowing my luck something else will get disturbed.
1.6D 2019 VW T-Cross
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶
200hp VW T6
1̶Y̶ ̶1̶9̶8̶7̶ ̶H̶i̶-̶t̶o̶p̶ ̶C̶a̶r̶a̶v̶e̶l̶l̶e̶
5̶0̶8̶d̶ ̶M̶e̶r̶c̶