24-02-2021, 04:34 PM
Hi
Yes, that looks like the early Ruby one. The shaft runs in 3 thin zinc bushes, which in turn are within spherical bearings to give self alignment even with a little chassis twist. As long as the shaft turns easily in the bushes, without too much clearance, but the SA bearings are still stiff enough enough not to turn in their flanged housings then all should be well.
I suggest you clean it up and oil it, then see how it goes. Taking the shaft off is quite a palaver so I'd only recommend it if you really need to attend to the bearings.
Whilst on the subject of this shaft, there is no compensation between front and rear brakes except for a tiny bit of springiness in the cables etc. For this reason, setting up the cables is needs care. By adjusting the nut on the semicircular yoke for the front brakes, you can easily go from nearly all fronts to nearly all rears over a surprisingly small range of adjustment. The key to understanding brakes is that the movement of the various parts is the thing you can see, but it's the invisible forces and tensions which actually do the job of braking.
Yes, that looks like the early Ruby one. The shaft runs in 3 thin zinc bushes, which in turn are within spherical bearings to give self alignment even with a little chassis twist. As long as the shaft turns easily in the bushes, without too much clearance, but the SA bearings are still stiff enough enough not to turn in their flanged housings then all should be well.
I suggest you clean it up and oil it, then see how it goes. Taking the shaft off is quite a palaver so I'd only recommend it if you really need to attend to the bearings.
Whilst on the subject of this shaft, there is no compensation between front and rear brakes except for a tiny bit of springiness in the cables etc. For this reason, setting up the cables is needs care. By adjusting the nut on the semicircular yoke for the front brakes, you can easily go from nearly all fronts to nearly all rears over a surprisingly small range of adjustment. The key to understanding brakes is that the movement of the various parts is the thing you can see, but it's the invisible forces and tensions which actually do the job of braking.