| Ford Model A |
Ford Model A - Centering rear brake shoes - Building a tool (with plan)
Compared with the front centering tool, this one for the rear side is a little bit more complex. You don't have much space for the tool and therefore I would advise you to make a test regularly that the tool doesn't touch anything if you turn it by 360 degree.
The tool has a welded structure and has 5 ball bearings. Four are on side and one is located on the opposite side and has little pressure to the center. The ball bearings are the same which are used for roller blades (diameter: 22 mm / hole: 8 mm / width: 7 mm)
This is how the tool works. From the two moving plates is one for the service brake shoes and the other for the emergency brake shoes.
Here you can se the narrow space conditions.
The handle with the 5th bearing has a preload and acts like a spring. Therefore all 5 bearings are in contact with the axle.
This is a side view without all the components. On the right side below you can see a small tube where a nut is welded on top of the tube. This is an adjustable stopper that the tool will not slip too for to the rear when it is mounted on the axle.
This is the view from the other side.
The 4 ball bearings are installed onto these threaded rods (M4) which are already mounted.
Then the bearings are mounted. The distance is set by washers.
Everything is installed now. In the background the adjustable stopper is visible.
This is the blueprint for those of you who want to build such a tool. To get a better view just click here onto blueprint or onto the image itself.
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Creation Date: 16.04.2006
