Rear brake drag

[amcjam]

Hi

While preparing bike for an up and coming trip, I thought i'd change rear brake hose to stainless, strip and clean rear caliper, new sliding pin rubber covers. Now all back together there is a slight drag on the disk which makes the disk warm to the touch, not hot. When bleeding the brakes i only bled from rear caliper. The brakes feel good and pedal feels solid, but the pads do not fully release.
Any idea what I could check next.
The bike is a 2000 1150gs abs.
thanks in advance

amc

 

[Slipperyeel]

What condition is the retaining pin in? If that's all corroded and rutted it could prevent the pads sliding around as they should.

 

[ian6760]

If everything is good on the slider pins, try backing off the adjuster on the brake pedal a little.

 

[MarkShelley]

I had a problem with pads not moving freely. It was caused by a bit of corrosion underneath the removeable stainless 'slider'. The corrosion to the ally had pushed the slider out a tad thus reducing clearance. Once inhad scraped the area clean and replaced the slider all was well.

 

[amcjam]

hi guys

thanks for that, I'll deal with those points you have suggested and keep you posted.

amc

 

[The Grey One]

If everything is good on the slider pins, try backing off the adjuster on the brake pedal a little.

This only changes the free play between the push rod and the piston, it is not a brake adjuster. There must be a little free play to allow for expansion due to heat within the braking system. If there is too little play it might cause the symptom mentioned. No play at all will result in binding and eventually seizing up.

If the brake the adjuster has previously been tampered with then slacken it off , hopefully all will be well. If it hasn't been previously adjusted there may be another problem.

John

 

[topcat2006]

Do you have rubber hoses? I had a similar issue on my 1100 caused by a hose degrading internally and acting as a non-return valve.

 

[The Grey One]

Do you have rubber hoses? I had a similar issue on my 1100 caused by a hose degrading internally and acting as a non-return valve.

Good point!

If your 2000 bike still has rubber hoses you are on borrowed time, as is anyone on the same roads as you

John

 

[amcjam]

Hi
Just replaced rear hose with stainless, see post #1

cheers
amc

 

[The Grey One]

Hi
Just replaced rear hose with stainless, see post #1

cheers
amc

Yes sorry saw it too late!

 

[Spacemonkey]

When I did my old Transalp the rear was dragging due to a small amount of corrosion on the piston stopping it returning enough.

Fixed by removing pads and pumping the brake and pushing out piston enough to clean it up with some very fine wet and dry. Reassembled and all worked well.

 

[Slipperyeel]

When I did my old Transalp the rear was dragging due to a small amount of corrosion on the piston stopping it returning enough.

Fixed by removing pads and pumping the brake and pushing out piston enough to clean it up with some very fine wet and dry. Reassembled and all worked well.

0000 wire wool is also good...it inadvertently cleans the whole area, poison and neighbouring caliper body with little to no risk to the metalwork