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1Back to top Go down   Refill front brake system help!! Empty Refill front brake system help!! on Sat Oct 31, 2015 6:40 am

JaseYPK

JaseYPK
Silver member
Silver member
hey guys, I'm after a guide on how to refill my front brake system as what I'm trying isn't working! 

What I'm doing now:
Fill master cylinder with both calliper nipples shut. 
Squeeze brake lever, open nipple (which has a hose run into a glad jar with fluid in).
No bubbles appear, so I close the nipple with the lever still squeezed.  


What's going on? It's as if the brake system isn't forcing the air out the system?! I removed everything when I changed my head bearings..

Note - the brake lever never stiffens up as if it's not generating pressure...

Help! (Without buying pumps etc preferably!)

Cheers


__________________________________________________
1984 K100 RS - The Project!
    

2Back to top Go down   Refill front brake system help!! Empty Re: Refill front brake system help!! on Sat Oct 31, 2015 7:45 am

Dai

Dai
Life time member
Life time member
1. Open nipple
2. Squeeze lever
3. Close nipple
4. Release lever.

I think you've got 1 and 2 reversed. You can also open up both caliper nipples, fill the master cylinder and pump like hell. That frequently gets fluid into the system. When the fluid comes out of the calipers, close the nipples and pressurise the system. If it doesn't pressurise fully, repeat 1-4 as necessary.

I've assumed the front brakes 'used to work'. If you're uncertain about that or they were poor, it's just possible that the inner seal on the master cylinder is now toast or that the return port in the master cylinder is blocked. Either way, it will be overhaul time.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

3Back to top Go down   Refill front brake system help!! Empty Re: Refill front brake system help!! on Sat Oct 31, 2015 9:16 am

JaseYPK

JaseYPK
Silver member
Silver member
cheers  Worked a treat, thanks Dai!
Yeah they worked great before, and now work again! Problem solved!


__________________________________________________
1984 K100 RS - The Project!
    

4Back to top Go down   Refill front brake system help!! Empty Re: Refill front brake system help!! on Sat Oct 31, 2015 9:30 am

blaKey

avatar
Life time member
Life time member
Nicely done, Dai!


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

5Back to top Go down   Refill front brake system help!! Empty Re: Refill front brake system help!! on Sun Nov 01, 2015 12:14 pm

Corkboy

Corkboy
Life time member
Life time member
Also, if you are near a Halfords, they have a brake bleeder, which is two tubes with a non-return valve (ball bearing and spring inside a metal housing) between them.  Around £10, but very handy for opening the nipple and pumping away.  I used to do the open-squeeze-close-release, but the brake bleeder stopped all that.


__________________________________________________
Regards,

Corkboy '87 K100RS SE (The black one - one of the two bikes I'm sorry I sold)
             '87 K100RS 0140995 (Gone)
             '97 K1100LT 0188024 (Gone)
             '08 K1200GT Wedge - but still a K
             '08 Transalp 700
    

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