Odd back break behaviour!

[skatefreak]

Hey,
I suspect my back break is sh*gged, well shagging up .

A while back removing the caliper whilst talking to my brother and dad and not paying any attention i undid the two screws holding the caliper together and before i realised break fluid starter leaking everywhere

Soooo, i quickly screwed it back together, cleaned the break fluid off me/the ground and thought that was that.

Rode home and when i got home noticed there was break fluid on the disk and inside the wheel... It was still leaking, anywho, the next day, a little looksee in the service manual and i figured it was the o-ring so i took it appart again, re-aligned the o-ring, put some more fluid in, cleaned the disk, sanded the surface of the pads and bobs yr unkle.

Over the next month they started feeling a little off'ish to the point it now feels like i have a warped disk and wooden break pads...

At first i felt the bike vibrate slightly when pressing the back break but the pedal didnt vibrate (at one point it even made the clocks shake a little but nothing through the pedal), untill one day the bike stopped shaking and now the pedal vibrates!

Fantastic!

I wonder if there is a chance i didnt take enough off the pads and that the b-fliud has sh*gged the pads and somehow caused the disk to overheat and warp (never really use the back break very aggressivly accept when i re-broke in the pads).

Also now every time i use the pedal for the first time in a ride it moves quiet far before engaging the pads but on the second pump its back to normal...

Any thoughts would be much appreciated.

Best regards

-Jvr

[cb1rocket]

You probably has let air into the brake system and therefore need to bleed them

[Ichy]

Air in the BRAKE hose can cause the BRAKE to lock up. As suggested, give them a good bleed first.

[Walloper]

It's horrible when someone rights that there having problems with breaks it reely spoils my tea brake.
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W-ireless A-rtificial L-ifeform L-imited to O-bservation P-eacekeeping and E-fficient R-epair

[SlimRick]

How to Treat a Back Break

Treatment for a Back Break may vary greatly according to the degree of the injury and whether the spinal cord is affected. While a broken back, which involves a fracture to one or more vertebrae, almost always requires surgery, the methods of treatment and the length of your recovery will depend upon many factors.

Difficulty: Moderately Challenging
Instructions

Things You'll Need:
Physician and orthopedic surgeon
Back brace or traction cast
MRI or CAT Scan
Treat a Broken Back
1
Do not try to move yourself if you suspect you have broken your back, unless your life is in immediate danger (such as being trapped in a fire). Any movement can aggravate the injury and increase the chances of injury to the spinal cord. Call 911 and wait for emergency medical assistance.
2
Have the doctor evaluate the degree of your injury by using either an MRI (magnetic resonance image) or a CAT scan. This will determine your course of treatment and the type of surgery you will need.
3
Determine which type of surgery will be used to treat your broken back. Usually, a fractured vertebrae will simply be fused to the one next to it, or it will be removed completely and replaced with a bone graft. Care must be taken to remove any bone chips or fragments that could cause damage to the spinal cord over time.
4
Immobilize your back after surgery to allow for recovery. This may be achieved through the use of a traction body cast in more severe fractures, or a back brace. Recovery from back surgery is usually slow, so be patient with your progress.
5
Use physical therapy to strengthen and stretch your back muscles once you are no longer using a brace or body cast. Building up the muscles around your vertebrae can help to protect them from further injury down the road. It is easy to re-injure yourself after back surgery, so take it easy and listen to your doctor during the recovery process.
6
Check out websites such as eMedicinehealth and the Dartmouth-Hitchcock Medical Center, among others, for more tips on how to treat a broken back (see Resources below).



HTH

[Clanger]

Why is breaking a back in The Workshop...I know we don't have a Doctor category but Auntie BCF comes closest!!!
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Be who you are and say what you feel, because those who mind don't matter, and those who matter won't mind - Dr. Seuss

[Teflon-Mike]

Start by overhauling the caliper & replacing that O-Ring.
Rubber seals in brakes are designed to 'swell' to make a good seal, and brake fluid has a solvent in it called a seal sweller.
You should NEVER re-use a rubber seal, in a brake system, as it will have been swelled by the brake fluid, and when re-fitted wint seat correctly or seal with teh same pressure, as it wont re-swell.
Then bleed the system through properly.
Double pump suggests that you may be pumpng fluid out of weak seal, and have an air-lock.
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My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'

[skatefreak]

Cheers for the input,
I havnt been losing fluid si i wouldnt have thought there was a leak but the air idea dosnt seem 100% in my mind either as after the first pump the break seems to be just fine for the rest of the ride...

Anywho, i shall dig out some fluid/piping and proceed to give them a bleed then new pads, piston seals, disk in that order untill the problem is solved haha (hopefully stopping around "seals" to keep my wallet happy

Am just mighty bemused as there certainly seems to be some vibration coming from somewhere....

Best regards

-Jvr

[Walloper]

[Robby]

Also, if your pads have been covered in brake fluid then replace them. Sanding the fronts a bit won't do, anything oily seems to just soak in.

This is why sod's law always makes your fork seals blow just after you fitted new front brake pads.

[BanditsHigh]