Mark_H
Husqvarna
AA Class
I have had an annoying rear wheel squeak for a few days now so I decided it was time to sort it out.
It appears after a few miles and every time I touch the rear brake it goes away for a minute or two then returns.
Fearing the worst (dead Wheel bearings) I set about inspecting what was going on.
My bike has covered only 6500 km and to my surprise I found the rear pads were well worn, not quite on the 1 mm limit in the manual, but getting close on one side.
The pads were slightly unevenly worn, one was about 2.5-3.0 mm remaining, the other was less than 2mm.
I pulled a set of new SBS pads out of my ready parts bin and tried to fit them.
That was when I found that the Floating Caliper was no longer floating, it would not budge in or out.
So out came the wheel and inspection of the 4 wheel bearings revealed no problems, so far.
Removing the caliper and getting it on the bench I found the rearmost locating pin that fits into the rubber was no problem, although there was little or no grease inside the rubber.
The problem was the forward pin, totally seized in the caliper carrier, despite the oil seal and rubber being in good condition.
This had caused caliper to stick and the premature and uneven wear of the pads and possibly the squeak.
Whatever I tried it would not move at all, so bigger tools were called for.
Armed with WD40 and a big G-Clamp I set about trying to get this pin to move. The lubricant left to soak in overnight, then I just managed to get the clamp to squeeze the pin in about 1mm.
Continuous squeezing in and levering back out for an hour or so got it moving but not enough to get clearance to remove the other pin.
Eventually after much work I managed to part the caliper from the carrier and found the pin to be quite corroded
The effort involved in getting the two apart was considerable and it is clear that there may never have been any form or lubrication on the pin or in the socket.
I cleaned up the pin as best I could but it is evident that the corrosion has pitted the steel slightly.
I have reassembled the caliper and used plenty of anti-seize compound on the two pins and now the caliper is floating correctly as it should have been.
I am not impressed that a supposedly high quality original Brembo Caliper could seize up and cause such problems in a relatively short period of time. It would appear that the caliper was assembled with little or no lubrication on the pins, both seals were in good condition but everything inside was dry and corroded considerably.
Maybe I have a 'Friday' bike, or maybe this is just another of the 'lemon' factors because my bike has not been used 'off road' or in water so as to cause this to happen.
I would be interested if anyone has had similar issues or is it time for everyone to check their bikes ??
It appears after a few miles and every time I touch the rear brake it goes away for a minute or two then returns.
Fearing the worst (dead Wheel bearings) I set about inspecting what was going on.
My bike has covered only 6500 km and to my surprise I found the rear pads were well worn, not quite on the 1 mm limit in the manual, but getting close on one side.
The pads were slightly unevenly worn, one was about 2.5-3.0 mm remaining, the other was less than 2mm.
I pulled a set of new SBS pads out of my ready parts bin and tried to fit them.
That was when I found that the Floating Caliper was no longer floating, it would not budge in or out.
So out came the wheel and inspection of the 4 wheel bearings revealed no problems, so far.
Removing the caliper and getting it on the bench I found the rearmost locating pin that fits into the rubber was no problem, although there was little or no grease inside the rubber.
The problem was the forward pin, totally seized in the caliper carrier, despite the oil seal and rubber being in good condition.
This had caused caliper to stick and the premature and uneven wear of the pads and possibly the squeak.
Whatever I tried it would not move at all, so bigger tools were called for.
Armed with WD40 and a big G-Clamp I set about trying to get this pin to move. The lubricant left to soak in overnight, then I just managed to get the clamp to squeeze the pin in about 1mm.
Continuous squeezing in and levering back out for an hour or so got it moving but not enough to get clearance to remove the other pin.
Eventually after much work I managed to part the caliper from the carrier and found the pin to be quite corroded
The effort involved in getting the two apart was considerable and it is clear that there may never have been any form or lubrication on the pin or in the socket.
I cleaned up the pin as best I could but it is evident that the corrosion has pitted the steel slightly.
I have reassembled the caliper and used plenty of anti-seize compound on the two pins and now the caliper is floating correctly as it should have been.
I am not impressed that a supposedly high quality original Brembo Caliper could seize up and cause such problems in a relatively short period of time. It would appear that the caliper was assembled with little or no lubrication on the pins, both seals were in good condition but everything inside was dry and corroded considerably.
Maybe I have a 'Friday' bike, or maybe this is just another of the 'lemon' factors because my bike has not been used 'off road' or in water so as to cause this to happen.
I would be interested if anyone has had similar issues or is it time for everyone to check their bikes ??
