26-09-2018, 09:46 PM
I am overhauling the cross-shaft and bearings on the coupled brakes on my 1934 Box Saloon. With all parts cleaned and measured, it can be seen that there is little wear on the N/S bearing and some wear on the centre bearing, which measures 1.181 inches diameter. If I guess that this was an inch and three sixteenths when new (1.1875"), then there is about 6 thou wear.
The O/S bearing, next to the foot brake connection, is at the end of a long length of inch and five sixteenth shaft (1.3125") and would have been this same diameter when new. It is now slightly oval with diameters between 1.301" and 1.304" diameter. If a new bearing sleeve was to be slid up the shaft it would need to be (say) 1.314" inside diameter, so there would be 10 to 13 thou slogger.
Before I consider machining the 1.3125" part of the shaft to match the cleaned up part of the O/S bearing (and maybe cleaning up the centre bearing) it begs the question: is it worth it?
In other words, would this amount of slogger affect the braking efficiency, or make it harder to correctly adjust the brakes? I would be pleased to know if anyone has previously commented on this.
Ron
The O/S bearing, next to the foot brake connection, is at the end of a long length of inch and five sixteenth shaft (1.3125") and would have been this same diameter when new. It is now slightly oval with diameters between 1.301" and 1.304" diameter. If a new bearing sleeve was to be slid up the shaft it would need to be (say) 1.314" inside diameter, so there would be 10 to 13 thou slogger.
Before I consider machining the 1.3125" part of the shaft to match the cleaned up part of the O/S bearing (and maybe cleaning up the centre bearing) it begs the question: is it worth it?
In other words, would this amount of slogger affect the braking efficiency, or make it harder to correctly adjust the brakes? I would be pleased to know if anyone has previously commented on this.
Ron