Jump to content

Fork Oil On Brakes


Recommended Posts

While going over my bike after returning from my deployment I found a leaking fork seal which has allowed fork oil to leak on to my brake caliper, pads & rotor. After cleaning it all up with brake cleaner to include dis-assembling the calipers, I've noticed the brakes are still minimally effective. My understanding now is that if you ever get hydraulic fluid on a brake pad, it's done. Time to replace it. Is that, in fact, the case or is there a way to clean them to make them effective again? What about the effect on the rotors or calipers?

 

Benny

Link to comment
Share on other sites

By disassembling the caliper do you mean removed the pistons ? Its possible there is still some air trapped in the system somewhere, after completely rebuilding my calipers It took a lot to get all the air out of the system, something Eirik had mentioned about pulling the lever in and zip tying it overnight really seemed to help.

 

Not sure about cleaning the brake pads themselves, but after considerable research when rebuilding my brake system it seems resurfacing the rotors when changing pads especially when changing to a different pad compound is recommended, some people recommended bead blasting, some just sandpaper or scotchbrite, some suggest using a special hone. I went the hone route and the results were quite favorable. I do have some before and after pics, but the difference is less noticeable in the photos than it was in person

 

Tyler

Link to comment
Share on other sites

I did not remove the pistons, just the pads and gave everything a good scrub with brake cleaner, including the pads. I also flushed the brake lines (to include pushing the pistons back), put in fresh fluid and used the zip tie technique after bleeding the lines initially. I'm not getting any air out of the lines now & I have a very firm feel at the brake lever but still very minimal braking.

 

Good info on the rotors if I go the new pad route. Any other informed opinions on that subject?

 

Benny

Link to comment
Share on other sites

Again, in my experience, there was no oil residue left, no visible contamination nor any reduced effect after the pads had been "cooked". However, it will likely depend upon how long the oil has sat there and how much oil there was. For race track use, I'd probably just buy new ones to be 100% certain nothing would interfere as brakes do get very hot for long periods of time, but for street use I have not been able to detect anything to suggest the pads had been compromised permanently after the oil residue had been burned off.

Link to comment
Share on other sites

I work on a principle of "If in doubt toss it out".

 

It's expensive sometimes but when I'm having a glorious day riding at the track it's one less thing on my mind. That alone is worth it to me.

Link to comment
Share on other sites

Lots of good advise here, in my experience you can never get 100% back no matter how you clean the pads. I might use then on the street?

Cleaning the what is called the deposition layer off the rotors is recommended and then bedding the new pads by dragging the brakes and getting the pads hot enough to melt some material onto the surface of the rotor. This is like a drag car lining up in its burn out, the most grip is when the same material is on both sides. Once you feel the brakes start grab you know you are there and it's time to let it all cool off.

Link to comment
Share on other sites

Thanks for all the great info everyone. I'm defintiely going with the replacement option. Will, what do you recommend for cleaning the deposition layer off the rotors? Is that something I can do on my own or does that require special equipment/training?

 

Also, which brake pads are on the coach bikes? Are they stock? I like the initial bite and the fact they don't need to warm up. If they're stock, what Galfer pads would you recommend for a track only bike. I'd prefer not to have to warm them up but am willing to if they're that much better. I also don't want to go through rotors every season... tight budget.

 

Benny

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
×
  • Create New...