Author Topic: Replacement braking pads - problem with calipers?  (Read 663 times)

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Offline Greg_PL

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Hello all!

Recently I have changed my braking pads in Tiger 1200 gen 1.

Bike has 18k km and and front pads started to screeched just before final stop.

I disassembled front brakes and cleaned up.
They looks not to bad with 6mm total width, worn in same manner on both sides.
I cleaned them up and assembled again - no results.

I decided to Exchange - i bought EBC HH.

I changed them on both sides + rear and I observe that wheels are like little blocked by the new pads like on below videos:

https://photos.app.goo.gl/QGLHPQ4cN38zXjNg9
https://photos.app.goo.gl/3zf398qHACiB58VL6

Did i something wrong with them or is it normal "fitting" process?
I have made 5km ride and brakes where very hot.
Before Assembly i cleaned up the breaks with break cleaner.

After replacement all pistons should be pushed out in same way?

Any ideas what can help here?

Thanks in advance for advices.
Last Edit: June 12, 2022, 07:55:15 PM by Greg_PL

#1

Offline Bruce Wayne

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Re: Replacement braking pads - problem with calipers?
Reply #1 on: June 13, 2022, 07:33:15 PM
One of the things that could cause this is the fact that the discs could have a thicker end on them. Meininger that if you rub with your fingers from the inside to the outside, you might feel that on the end of the disc it Sems to be thicker then on the lower parts.

If this is the case, and it almost is over the years/milage since the pads do wear in the discs, the upper part of your new pads is running on this thicker edge.

What I do when installing new pads is using a file (like in a tool :084:) and file of the top end. This so the top side of the pad is not in direct contact with the disc.

Does this make sense?

#2

Offline Greg_PL

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Re: Replacement braking pads - problem with calipers?
Reply #2 on: June 13, 2022, 07:51:55 PM
Bike has już 18k km. Discs are in very good condition. No difference in thickness of the discs can be felt under the fingernail.

What do you mean by "using a file"?  :084:

For sure make sens!  :467:

#3

Offline Bruce Wayne

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Re: Replacement braking pads - problem with calipers?
Reply #3 on: June 13, 2022, 08:10:35 PM
*Originally Posted by Greg_PL [+]
Bike has już 18k km. Discs are in very good condition. No difference in thickness of the discs can be felt under the fingernail.

What do you mean by "using a file"?  :084:

For sure make sens!  :467:

The file, if this is the correct word, is the tool to sand/rub/shape of metal. (Like a fret file)

#4

Offline CaptainTrips

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Re: Replacement braking pads - problem with calipers?
Reply #4 on: June 13, 2022, 08:12:05 PM
Did you bleed the brake fluid at both ends? Put some fresh brake fluid through the system to flush out the old stuff.
"The test of the machine is the satisfaction it gives you. There isn't any other test."   --   Robert M. Pirsig

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Offline CaptainTrips

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Re: Replacement braking pads - problem with calipers?
Reply #5 on: June 13, 2022, 08:13:38 PM
*Originally Posted by Bruce Wayne [+]
The file, if this is the correct word, is the tool to sand/rub/shape of metal. (Like a fret file)
It shouldn't be necessary to file anything off EBC pads. I've never had to do that. That bike probably hasn't even had it's first major service yet.

I find that I have to push the pistons back and then carefully pump them out a quarter inch and then clean them with an old toothbrush and brake cleaner. And repeat this several times until they move freely.
Last Edit: June 13, 2022, 08:24:46 PM by CaptainTrips
"The test of the machine is the satisfaction it gives you. There isn't any other test."   --   Robert M. Pirsig

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Offline Greg_PL

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Re: Replacement braking pads - problem with calipers?
Reply #6 on: June 13, 2022, 08:40:00 PM
*Originally Posted by CaptainTrips [+]
Did you bleed the brake fluid at both ends? Put some fresh brake fluid through the system to flush out the old stuff.

I unscrewed the brake fluid reservoir.
Then pump Little the break one piston was pushed much more then others.
I cleaned up with break cleaner spray the whole caliper.
Then it was not possibe to push back one piston so i release little bit the bleed valve screw.
~20ml fluid was removed.
The pistons were possible then to push back.

Then i Put the breaking pads inside Put the spring meatl piece and screw it again.

Even without this 20ml fluild level showed right level.

After that i pump the break and run Bike for 5km around the house.

Once i back i observ situation which i showed on the movies.


#7

Offline CaptainTrips

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Re: Replacement braking pads - problem with calipers?
Reply #7 on: June 13, 2022, 10:43:01 PM
*Originally Posted by Greg_PL [+]
I unscrewed the brake fluid reservoir.
Then pump Little the break one piston was pushed much more then others.
I cleaned up with break cleaner spray the whole caliper.
Then it was not possibe to push back one piston so i release little bit the bleed valve screw.
~20ml fluid was removed.
The pistons were possible then to push back.

Then i Put the breaking pads inside Put the spring meatl piece and screw it again.

Even without this 20ml fluild level showed right level.

After that i pump the break and run Bike for 5km around the house.

Once i back i observ situation which i showed on the movies.
You need to get the pistons free enough that you can compress them with your fingers (and a thin piece of wood). That means multiple iterations of pushing all the pistons out a little bit, cleaning them, and pushing them back in again until they all move freely.

I would also bleed the brakes until you have completely replaced the dark fluid with fresh fluid.
Last Edit: June 13, 2022, 10:46:33 PM by CaptainTrips
"The test of the machine is the satisfaction it gives you. There isn't any other test."   --   Robert M. Pirsig

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Offline Robin

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Re: Replacement braking pads - problem with calipers?
Reply #8 on: June 15, 2022, 08:56:57 PM
Yes sounds like a sticking piston.
Older than the internet.

 



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