Sticky brake I知 at my wits end
#31
Bleeding brakes , especially ones that are completely empty of fluid can be a little tough . There's a good chance that you might still have air in the lines . Once you've changed the brake line , I would bleed them , don't be afraid to pump lots of fluid through , let it sit and pump more through it .
Anyone know if the hose from the reservoir to the master is supposed to be soft like squeezable ?
If I'm not mistaken , once the bleeding is complete , you should not be able to " pinch " the line . Pretty much should be hard as a rock .
Anyone know if the hose from the reservoir to the master is supposed to be soft like squeezable ?
If I'm not mistaken , once the bleeding is complete , you should not be able to " pinch " the line . Pretty much should be hard as a rock .
#32
Thanks Cogwell , Everything is fresh , except the line from reservoir to master , that痴 next !
#33
Thanks Bob , I picked bike up fresh rebuild to motor an tranny all bearings replaced , new front discs and pads they just didn稚 touch rear brake except pads as they said it seemed fine etc, ran 3000 kms and brake started to act funny , do you think it would do those kms if primary bearing wasn稚 set properly ? , we are talking Portuguese HD mechanics in Portugal ....damn brake is doing my head, I知 hoping the reservoir to master hose is the culprit as it痴 very soft
#35
the intake port has a very small hole and a hole about 1/8". I stuck my finger in the bore and plugged the larger hole and poured fluid into the intake port....the fluid wouldn't flow thru the very small hole. I kept my finger over the 1/8 hole and blew air into the intake port. it blew what ever was in there out. I kept the bigger hole plugged with my finger and poured fluid into the intake port and then the fluid flowed thru the very small hole. you might want to recheck it.
#36
Thanks Bob , I picked bike up fresh rebuild to motor an tranny all bearings replaced , new front discs and pads they just didn稚 touch rear brake except pads as they said it seemed fine etc, ran 3000 kms and brake started to act funny , do you think it would do those kms if primary bearing wasn稚 set properly ? , we are talking Portuguese HD mechanics in Portugal ....damn brake is doing my head, I知 hoping the reservoir to master hose is the culprit as it痴 very soft
#37
Hi Dan , Yes 1990 , DOT 5 and we flushed the lines , caliper everything was replaced , pins , bushings , seals and a couple other pieces , everything was lubricated , I should have just bought a new one but bike rode fine for 3000 kms so we obviously thought a rebuild to the caliper and master , new disc , braided line , new pads , would suffice
#38
#39
It's very possible that the hang up is the master. Wear and improper alignment of the piston to vent intake of the reservoir will lock up the caliper. Also, if the system is new or rebuilt, the master should always be bled into itself. Then connected to banjo fitting. All bleeding needs to be done with cap off. The system is sealed relying on the bellow seal to pull down in normal operation. That is not enough for bleeding operation. Also over tighten of the master cap will squash the vent slot in the top side of the bellow . Not having air on top of bellow will keep it from coming back up. This and heat from rotor run-out can self apply brake.
#40
Doesn't the piston close off the reservoir when it is fully depressed creating a sealed hydraulic system to actuate the caliper pistons? It seems that you would want to leave the lever extended or half-way depressed to allow the air in the lines to migrate up to the reservoir...