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Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 7:46 am
by Declan_Burns
After a recent M/C leak and considering the location of the M/C, Hans Dieter came up with this level monitor. Currently being tested, appears to work perfectly and no adverse reactions to brake fluid. Still to be fitted with some extra grommets to prevent the wires touching the cap. Perhaps we might do it as a kit.
Any thoughts?
Declan+Hans Dieter Gollus

Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 8:55 am
by rayofleamington
Unfortunately the top of the cap is at carpet level so anything coming out of the cap might catch your feet.
to monitor the level, it's worth to convert to a remote reservoir - this also adds more capacity for lost fluid!
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 11:12 am
by Declan_Burns
Ray,
The wiring goes under the carpet.
Can also be fitted to a remote reservoir.
Regards
Declan+Hans Dieter Gollus
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 1:25 pm
by Bazzalucas
Does anyone have a pic of a M/C cap set up for a remote reservoir? I have an extra cap, and would be interested in knowing the procedure for conversion. Thanks!
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 1:56 pm
by mike.perry
Do you connect the wires to a warning light, perhaps the blocked filter light on the speedo which never does anything?
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 4:42 pm
by Declan_Burns
Mike,
You can do that and I've mentioned that on a sample wiring diagram-see below.[frame]

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Regards
Declan+Hans Dieter Gollus
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 4:49 pm
by Declan_Burns
Bazzalucas wrote:Does anyone have a pic of a M/C cap set up for a remote reservoir? I have an extra cap, and would be interested in knowing the procedure for conversion. Thanks!
Bazz,
The remote reservoir kit comes with a fitting which screws into the back of the M/C. The hexagonal connector in the centre of..
http://morrisminorspares.co.uk/shop/pop ... b800349759
The vent hole in the original cap is then sealed off. I used epoxy-see below
Regards
Declan[frame]

[/frame]
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 6:50 pm
by simmitc
Like others, I think that the floor mounted switch will be too high above the floor to be of use, but I would be interested for the remote reservoir - no matter how often one checks the fluid level, it's impossible to monitor for faults developing whilst driving, and the switch would be an answer.
A development that I'd really like to see is a dual circuit servo assisted system where the cylinder still fits in the standard place....
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 7:20 pm
by Declan_Burns
simmitc wrote:Like others, I think that the floor mounted switch will be too high above the floor to be of use, but I would be interested for the remote reservoir - no matter how often one checks the fluid level, it's impossible to monitor for faults developing whilst driving, and the switch would be an answer.
A development that I'd really like to see is a dual circuit servo assisted system where the cylinder still fits in the standard place....
Simmitc,
The wire can be taken out through one of the flats on the cap so it will not be higher than the top of the cap. Look at the photo with the yellow cap above.
I'll send you some info on that dual circuit M/C by PM-it is available. I don't have a price on it but have asked for it.
Regards
Declan + Hans Dieter Gollus
Re: Master cylinder brake fluid monitor
Posted: Thu Jan 20, 2011 8:54 pm
by simmitc
Declan, I shall look forward to the PM, thanks. Unless it's something to do with the camera angle, it still looks as though the yellow cap is considerably taller than the hex head on the standard metal top; but I will keep an open mind.

Re: Master cylinder brake fluid monitor
Posted: Fri Jan 21, 2011 6:45 am
by Declan_Burns
PM sent.
We intend to keep the cap as low as possible-will try and get a better photo showing this.
Here we go:
Here's a photo with the moulded rubber cap made up for the application. At present the top of the cap is at 12.5mm (1/2")above the floor-can be reduced to 10mm. Second photo shows the carpet folded back with no great bulge.
Declan + Hans Dieter
Regards
Declan
Re: Master cylinder brake fluid monitor
Posted: Fri Jan 21, 2011 3:52 pm
by katy
What source is the float switch from?
Re: Master cylinder brake fluid monitor
Posted: Fri Jan 21, 2011 5:02 pm
by Declan_Burns
Katy,
The switch is made by a swiss company called Reed Electronics AG. Their website is I'm afraid only in German as far as I can see.
http://www.reed.ch/minischwimmschalter.php
Regards
Declan