She's been this way since I met her. The rear drum brake works fine, but the front disc brake works intermittently. Front braking goes like this: a little bit of braking, slip, a lot of braking. Really jerky stop/start sort of reaction. So it seems pretty simply, just replace the brake fluid. Except when I saw this seal:
And I figured, that is a pretty good explanation for why the brakes have water/air in them and/or fluid leaked out.
Thankfully a master cylinder seal set costs about 40 zloty or about $11.
First I'll take the front wheel off
This is mainly for convenience to get at the brake caliper
I've loosened the bleeder screw in the above pic, once I take the master cylinder cap off, the fluid really comes out.
Here are the ruined seals of the master cylinder:
The new seal set
How the master cylinder gets assembled
Whew, took a little vaseline to get that all together
Assembled including the new gauge o-ring and cap seal
Put some bearing grease on the brake lever
Reassemble and we're good to go!
To answer Joe's question from the comments section, this o ring:
Seals the inspection window which shows you how much brake fluid you have
This translucent (it isn't perfectly clear) plastic part gets inserted from the inside into a hole in the front of the fluid chamber and secured with a spring clip.
The cap seal
goes on top of the fluid reservoir under the metal cover
hi there just had all this apart as you got a new gauge o ring but where does the cap seal go ?
ReplyDeleteHi Joe, edited the post above to answer your question
DeleteHi, my front brake does not come to original place when leaving the break. Any idea on this? Looks like the spring does not work well.
ReplyDelete