WherEmEweeD Posted January 4, 2013 Posted January 4, 2013 Hi I just removed my brake and cleaned it up took pads out etc and drained the old dot 4. Now i have pumped new dot 4 and there is no brake action just a limp brake lever with no resistance and brakes which don't work This is the front brakes i have not got to the back brake.
Moderator Airhead Posted January 4, 2013 Moderator Posted January 4, 2013 it no doubt needs bleeding properly
Moderator drewpy Posted January 4, 2013 Moderator Posted January 4, 2013 you should not need to have it dry. try pulling the brakes lever back when opening the bleed screw, zip tie it back , retighten the bleed screw and leave overnight. that should get some fluid into the MC. 1
wild foamy Posted January 4, 2013 Posted January 4, 2013 similar problem on the XJ600 and on the classic mini which i put down the the master cylinder seals collapsing, used a syringe to reverse bleed the lines from the nipple on the caliper up to the master cylinder and reinflating the seals 1
WherEmEweeD Posted January 4, 2013 Author Posted January 4, 2013 Ok so i will try leave the brakes pulled in to flood the brakes overnight. I drained all the dot 4 fluid. It probably will take that to refill the brakes with dot 4 fluid. I would love to use your method of filling from the nipple to the reservoir but i do not have a syringe tool for the job.
Moderator Airhead Posted January 4, 2013 Moderator Posted January 4, 2013 get some help a mate doing the nipple and tube in a jar bit pull the lever gently until thes resistance and keep gentle pressure on mate undoes the nipple, the lever pulls to the handlebar...keep it there mate tightens the nipple let the lever out fully REPEAT until no bubbles in tube...keep level topped up 1
Moderator drewpy Posted January 4, 2013 Moderator Posted January 4, 2013 get some help a mate doing the nipple and tube in a jar bit pull the lever gently until thes resistance and keep gentle pressure on mate undoes the nipple, the lever pulls to the handlebar...keep it there mate tightens the nipple let the lever out fully REPEAT until no bubbles in tube...keep level topped up what are mates for if not for playing with your nipples 1
WherEmEweeD Posted January 4, 2013 Author Posted January 4, 2013 cheers for tips airhead will give that a shot in the morning. i tried doing exactly what you said even watched a couple videos on youtube on it but didn't feel any pressure from beginning to end. I think my problem is that i dont have a hose pipe big enough for fitting to the nipple. I take it trying this is pointless without a hose pipe. Will be down town tomorrow looking for a hose pipe.
NEV Posted January 4, 2013 Posted January 4, 2013 Ok so i will try leave the brakes pulled in to flood the brakes overnight. I drained all the dot 4 fluid. It probably will take that to refill the brakes with dot 4 fluid. I would love to use your method of filling from the nipple to the reservoir but i do not have a syringe tool for the job.
Moderator Airhead Posted January 4, 2013 Moderator Posted January 4, 2013 yes you need a well fitting pipe thats VERY important, you dont want the fluid spilled on the caliper and pads!!! Try the chemists for tube, or car accessory shop 1
wild foamy Posted January 5, 2013 Posted January 5, 2013 this is what i use for reverse bleeding, purely because it was leftover from my model aircraft days, but worked a treat 1
WherEmEweeD Posted January 5, 2013 Author Posted January 5, 2013 get some help a mate doing the nipple and tube in a jar bit pull the lever gently until thes resistance and keep gentle pressure on mate undoes the nipple, the lever pulls to the handlebar...keep it there mate tightens the nipple let the lever out fully REPEAT until no bubbles in tube...keep level topped up Have just bleed it fully good 10 times. No bubbles what so ever. Still no pressure in the brake lever. I don't think the drums are pushing against the disc at all as there is good bit of play in the brakes. I have just taken brakes off and the disc and pads out and there is no movement in the drums at all. I did take the drums out is there something i could have done wrong?
Moderator Cynic Posted January 5, 2013 Moderator Posted January 5, 2013 Are the caliper pistons in contact with anything. If there is a gap between the piston and pad, pad and disc or both then there will be no pressure. If the pads have taken the space up and thats it try pushing them back into the caliper. This should force fluid back up the line and get things going. Oh and the pipe. Vital. Like having a bike with no petrol. 1
WherEmEweeD Posted January 5, 2013 Author Posted January 5, 2013 Happy days shes back online! after much back pain and patience Used most methods posted but in the end it was sucking the pipe that scored the goal. Atleast now i'm well educated for bleeding the rear brakes lol MOT will be soon coming Thanks for all the advice
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