rear brake adjuster not working! Options

[monkeyboy]

I just installed a new set of PMB rear brake calipers, and pads. When I go to adjust the venting clearance, the passenger side, outside adjuster does nothing. I got the driver side adjusted just fine.

Can anyone help?

I did search, and tried to use my air gun to get it back on track and didn't have any success. I do know that it needs to be turned counterclockwise, but if it was turned the wrong way, could it have come apart inside?

Thanks

[davep]

Use of an air gun is almost guaranteed to cause trouble.

Yes, you can pop it apart inside, although that would be rare in this instance.

I would try to get the piston moving by stepping on the brake. You may need to put in a thin brake pad, move the piston out a little, then force it back in. This is just to get the piston moving a little. Sometimes the internal mechanism will spin inside of the piston if there is less friction there than the piston sliding in the bore. This can happen more often when the mechanism is lubed during the install process. There is no lock as such between the mechanism and the piston, and what will move is the part with the least resistance.

[Cap'n Krusty]

Use of an air gun is almost guaranteed to cause trouble.

Yes, you can pop it apart inside, although that would be rare in this instance.

I would try to get the piston moving by stepping on the brake. You may need to put in a thin brake pad, move the piston out a little, then force it back in. This is just to get the piston moving a little. Sometimes the internal mechanism will spin inside of the piston if there is less friction there than the piston sliding in the bore. This can happen more often when the mechanism is lubed during the install process. There is no lock as such between the mechanism and the piston, and what will move is the part with the least resistance.

Well, I don't think that's true .................. Inner and outer adjusters are linked to the pistons, and you MUST apply pressure on the piston as you turn the adjuster to retract it. You don't have to use pressure to move it out. Failure to push on the piston while retracting it can (and frequently does) cause the adjuster mechanism to become disengaged. That's not good.

The Cap'n

[monkeyboy]

Use of an air gun is almost guaranteed to cause trouble.

Yes, you can pop it apart inside, although that would be rare in this instance.

I would try to get the piston moving by stepping on the brake. You may need to put in a thin brake pad, move the piston out a little, then force it back in. This is just to get the piston moving a little. Sometimes the internal mechanism will spin inside of the piston if there is less friction there than the piston sliding in the bore. This can happen more often when the mechanism is lubed during the install process. There is no lock as such between the mechanism and the piston, and what will move is the part with the least resistance.

Well, I don't think that's true .................. Inner and outer adjusters are linked to the pistons, and you MUST apply pressure on the piston as you turn the adjuster to retract it. You don't have to use pressure to move it out. Failure to push on the piston while retracting it can (and frequently does) cause the adjuster mechanism to become disengaged. That's not good.

The Cap'n

If I turned it the wrong way when I first installed it, and it came disengaged, how would I reengage it? Do I have to take the whole caliper apart?