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The rebirth of Lazarus
Bryanj:
Bleed the master before connecting pipe.
Wearing gloves put finger over outlet hole and pull lever in release and reaply finger let lever go and reapply, repeat till pressure is felt under finger then whilst lever is held in use your third hand to fit and tighten hose and banjo bolt then try blleding at caliper.
This can take a while but has never failed for me, also cover everything you dont want fluid on!
Nurse Julie:
--- Quote from: mickwinf on December 10, 2023, 02:54:42 PM ---not much happening as I have been ill for a couple of weeks, but still struggling with the front brake bleeding. all new or refurbished, hoses rubber seals etc but just will not bleed. I have tried all the usual methods with syringes but no luck so getting really frustrated, even dismantled master cylinder in case i did something wrong.
--- End quote ---
Hope you're feeling better Mick. Did you fit a new pressure switch?. The reason I ask is that we bought a couple from David Silver last year and they were faulty. Graham almost sent himself doolally trying to bleed a front brake, all new parts and refurbed like yours, he kept swapping parts again and again with no luck. When he fitted the old switch, it bled up instantly. He tried the DS switch again on another bike and the same thing happened again, the system would not bleed. .
mickwinf:
Hi Bryan I did try that method but didn't seem to build up any pressure.
mickwinf:
Hi Julie, am feeling a bit better until my garage roofing felt went AWOL in the wind last night! It's the original pressure witch so hope that's not it.
Oddjob:
Try this Mike. Only really works with rubber hoses not braided.
Get a brake clamp or failing that a pair of mole grips, clamp the rubber hose near the joint at the bottom yoke, before the joint not after. Try pumping the MC now, if it's solid then the problem lies below where you've clamped, if not the force will tend to blow any airlock back through the MC, you'll see bubbles appearing in the reservoir. When it's solid move the clamp down to below the bottom yoke, test again.. If solid, the problem is in the caliper. Now release the pressure on the clamp until you can just about pump the lever, this will force fluid past the clamp but not allow it back up the pipe. In this way you can force the caliper to fill up, release the bleed nipple a little to allow any trapped air to escape.
Never failed to work but as I said an only be done with rubber hoses, never tried it with braided as I was worried it would damage the braiding, it may work though
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