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Nobby the Bastard |
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Nobby the Bastard Harley Gaydar
Joined: 16 Aug 2013 Karma :
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Bhud |
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Bhud World Chat Champion
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Weisse Schlange |
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Weisse Schlange Spanner Monkey
Joined: 09 Nov 2020 Karma :
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Bhud |
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Bhud World Chat Champion
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bikenut |
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bikenut World Chat Champion
Joined: 21 Nov 2011 Karma :
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Posted: 09:07 - 26 Jan 2022 Post subject: T |
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Nice clear picture of the res floor...
You should see two holes in the floor, one larger one near the pedal end, and a tiny one nearer the hose end, the pressure end of the MC.
The larger hole you will see the piston below.
The tiny hole you will see nothing apart from a column of tiny bubbles rising when the MC is filled with fluid initially, and the unit pumped.
There is white crud or something where I would expect to see the larger hole.
The tiny hole would be in the "countersunk" hole as seen in the picture.
You ultrasonically cleaned the unit, but is that very important tiny hole absolutely clean and clear !
It must not be blocked else the system will not work properly. This tiny hole is about 0.4mm diameter.
You have a guitar ?
Compressed air is good, so is hydraulic pressure using the caliper, but be weary of a "her or stream" of fluid coming out, and spraying onto the workshop ceiling !
The hole is tiny so needs hi pressure to clear...
The light method is good to "see" that the hole is clear.
Fluid will pass through this tiny hole by gravity/Syphon, the initial stage of bleeding.
Bleeding can be started via gravity method, to fill the hose and caliper, but an assistant is usefull unless you have a third hand.
With system initially bled/primed, move onto the pumping procedure...never let the fluid level in the res get too low.
Pump up the pedal say 5 times then hold down the pedal, open the caliper bleed nipple quarter of a turn and watch fluid and bubbles flow out, then tighten/nip the nipple.
Then let go of pedal, count to 5, time for the MC system to "refill", then repeat process.
Good communication is needed between you ( you are giving the orders and in charge !) and your assistant. Commands like pump up, down and let go are good.
Yes an air leaks at the nipple can be problematic, as can air drawn in past the MC open end piston seal.
That tiny hole must be clear, and your assistant obey orders given, only letting go a the pedal when ordered to do so.
You could back bleed, fluid entering the red by that tiny hole, or pressure bleed via an airtight fluid tight Res cover, tube and outside fluid Res, or similar.
So, caliper clean with all components as they should be, fitted to bike. MC unit clean with all components as they should be and fitted.
Res full, pedal used to prime, allow to gravity bleed. When bubbles from tiny hole and nipple tube are no more, bleed via pump up, holding pressure, opening nipple and watching fluid/bubble flow, untill no more bubbles.
You did "wet" the MC bore and seals during assembly ?
Learn the procedure etc., or get a wig.
Ps don't break a probe in that tiny hole ! ____________________ nuts about bikes |
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Farmingstock |
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Farmingstock Trackday Trickster
Joined: 17 Jun 2016 Karma :
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steve the grease |
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steve the grease Crazy Courier
Joined: 26 Jan 2018 Karma :
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Old Thread Alert!
The last post was made 2 years, 89 days ago. Instead of replying here, would creating a new thread be more useful? |
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