imported post
I have been concerned about the sponginess of my front brakes and could not bleed them adequately. So, I decided to remove the master cylinder and have a look to check for dirt and contimination. After I got in there I found that the cylinder and the 2 holes were full of gunk as were the piston, cups, and inside of the bore. It was terrible and took me a few hours to clean it all out.
After cleaning, I reassembled it, hooked everything back up, put some new fluid in, cracked the bleeder valve on the right tire, and began pumping the brake handle. I was expecting to feel some pressure and see fluid squirting out of the bleeder valve after pumping a few times.
What I experieced was quite different. I pumped the handle like crazy and nothing happened. There was very little resistance on the brake handle. Then I closed the bleeder valve and began pumping again. Nothing. No pressure ever built up.
The question I have is do I need to purchase a rebuild kit for the master cylinder- everything seemed OK after I cleaned it? Or am I missing something in my methodology that is not allowing the master cylider to be primed and hence work correctly?
Thanks in advance - hopefully someone can help me out as I need to get this back together by this weekend if at all possible.
JM Wolfe
I have been concerned about the sponginess of my front brakes and could not bleed them adequately. So, I decided to remove the master cylinder and have a look to check for dirt and contimination. After I got in there I found that the cylinder and the 2 holes were full of gunk as were the piston, cups, and inside of the bore. It was terrible and took me a few hours to clean it all out.
After cleaning, I reassembled it, hooked everything back up, put some new fluid in, cracked the bleeder valve on the right tire, and began pumping the brake handle. I was expecting to feel some pressure and see fluid squirting out of the bleeder valve after pumping a few times.
What I experieced was quite different. I pumped the handle like crazy and nothing happened. There was very little resistance on the brake handle. Then I closed the bleeder valve and began pumping again. Nothing. No pressure ever built up.
The question I have is do I need to purchase a rebuild kit for the master cylinder- everything seemed OK after I cleaned it? Or am I missing something in my methodology that is not allowing the master cylider to be primed and hence work correctly?
Thanks in advance - hopefully someone can help me out as I need to get this back together by this weekend if at all possible.
JM Wolfe