Finally back on the 1965 TR6SR project.
After splitting the crankcase and slipping the drive side off its roller bearing, I prepared to remove the timing side bearing as per Lunmad's video where he drops the retained crankshaft complete with bearing out of its heated case. However, as I readied myself to lower the assembly onto the wooden supports the crank just fell out – fortunately on to a worn piece of relatively-soft asphalt and not the concrete floor of the garage!
The internal diameter of the timing side bearing is specified as 1.125" and should be an interference fit on the shaft. My shaft does measure 1.125, but only at the point most close to the flywheel. It very rapidly drops to 1.123, however, and is relatively constant at that.
I already "researched" various possibilities such as building up weld onto the shaft (looks horribly expensive), nickel plating or nickel on a thin layer of copper (but NOT chromium) and cannot come to any conclusions, although the plating is something that could be achieved at home (maybe) and is probably too awkward for a plater to consider even if I could afford it.
I wasn't paying enough attention when I dismantled the timing gears but it looks as if the crankshaft pinion is free-running on the end of the shaft, so to speak, and does not impinge on the bearing inner ( I do know that it is keyed to the shaft :smile2
. I had hoped it would be 'locked' to the bearing inner when assembled, so that the inner would be clamped in place and, in theory, unable to move about in relation to the shaft. (Hope that makes sense.)
Anyway, does anyone have experience of this problem and, I hope, a solution?
Just as a matter of interest, the bearing appears to be original
After splitting the crankcase and slipping the drive side off its roller bearing, I prepared to remove the timing side bearing as per Lunmad's video where he drops the retained crankshaft complete with bearing out of its heated case. However, as I readied myself to lower the assembly onto the wooden supports the crank just fell out – fortunately on to a worn piece of relatively-soft asphalt and not the concrete floor of the garage!
The internal diameter of the timing side bearing is specified as 1.125" and should be an interference fit on the shaft. My shaft does measure 1.125, but only at the point most close to the flywheel. It very rapidly drops to 1.123, however, and is relatively constant at that.
I already "researched" various possibilities such as building up weld onto the shaft (looks horribly expensive), nickel plating or nickel on a thin layer of copper (but NOT chromium) and cannot come to any conclusions, although the plating is something that could be achieved at home (maybe) and is probably too awkward for a plater to consider even if I could afford it.
I wasn't paying enough attention when I dismantled the timing gears but it looks as if the crankshaft pinion is free-running on the end of the shaft, so to speak, and does not impinge on the bearing inner ( I do know that it is keyed to the shaft :smile2
. I had hoped it would be 'locked' to the bearing inner when assembled, so that the inner would be clamped in place and, in theory, unable to move about in relation to the shaft. (Hope that makes sense.)Anyway, does anyone have experience of this problem and, I hope, a solution?
Just as a matter of interest, the bearing appears to be original
