WingnutWick
Well Known Member
Hello!
So following my girlfriend's brake fire on her 6A I replaced the tire, tube, pads, and put on a braided nylon line instead of the previous rigid line. I cleaned the brake assembly as well and replaced the O-ring. The rotor was new just prior to the fire so I kept it. It had darkened from the fire which I though would clean off after a few uses of the brakes. I also used the opportunity to swap the bleeder valve from the top to the bottom.
After the repair all seemed normal vice a small pulsing in the right brake which I attributed to warping of the disk from the fire. Then after a couple flights a groaning sound began occurring during brake application which got progressively and rapidly worse.
I decided to replace the rotor altogether. I did this and initial taxi test seemed to solve the problem. The next time we went to fly, the noise was there with brake application and again, again getting progressively worse. I looked at the pads and there was some darkening that I figured was residue from the old, burned rotor. So then I replaced the pads today with new ones thinking that they had been contaminated by the old rotor.
Figuring I had the problem licked, my initial first brake attempts had no sound, then to my dismay, about 5 minuted into taxi test it came back again!
Now I am lost. I've re-done brakes a bunch of times on RV's with never an issue. I'm guessing the reason the sound doesn't start right off the bat after replacing thee items is due to the fact the pads were still new and not really gripping yet. But I still can't figure out what the heck is causing this horrible sound. The left has the old rigid brake line, the right brake (the repaired one making the sound) has the new flexible braided one.
My suspicions at the moment:
1. Due to event small amount of potential residue which remains from the original rotor? - Seems unlikely.
2. Due to swapping out the valve to the bottom?
3. Due to the new braided line somehow?
4. Some warping or compromise of the entire brake assembly due to the fire?
Here is a video so you can hear the sound which reverberates through the entire plane is quite unbearable. And photos of both brakes. As always, your help and insight is priceless!
VIDEO: https://youtu.be/lZGOIEUarts
So following my girlfriend's brake fire on her 6A I replaced the tire, tube, pads, and put on a braided nylon line instead of the previous rigid line. I cleaned the brake assembly as well and replaced the O-ring. The rotor was new just prior to the fire so I kept it. It had darkened from the fire which I though would clean off after a few uses of the brakes. I also used the opportunity to swap the bleeder valve from the top to the bottom.
After the repair all seemed normal vice a small pulsing in the right brake which I attributed to warping of the disk from the fire. Then after a couple flights a groaning sound began occurring during brake application which got progressively and rapidly worse.
I decided to replace the rotor altogether. I did this and initial taxi test seemed to solve the problem. The next time we went to fly, the noise was there with brake application and again, again getting progressively worse. I looked at the pads and there was some darkening that I figured was residue from the old, burned rotor. So then I replaced the pads today with new ones thinking that they had been contaminated by the old rotor.
Figuring I had the problem licked, my initial first brake attempts had no sound, then to my dismay, about 5 minuted into taxi test it came back again!
Now I am lost. I've re-done brakes a bunch of times on RV's with never an issue. I'm guessing the reason the sound doesn't start right off the bat after replacing thee items is due to the fact the pads were still new and not really gripping yet. But I still can't figure out what the heck is causing this horrible sound. The left has the old rigid brake line, the right brake (the repaired one making the sound) has the new flexible braided one.
My suspicions at the moment:
1. Due to event small amount of potential residue which remains from the original rotor? - Seems unlikely.
2. Due to swapping out the valve to the bottom?
3. Due to the new braided line somehow?
4. Some warping or compromise of the entire brake assembly due to the fire?
Here is a video so you can hear the sound which reverberates through the entire plane is quite unbearable. And photos of both brakes. As always, your help and insight is priceless!
VIDEO: https://youtu.be/lZGOIEUarts
Last edited: