Hi Rob, Its a long time since I struggled with your lathe in Housten. The oil filter mods were originally made by Len Wilton and have been copied through the decades. The problem with this solution is that if the oil system contains water, say from a leaking drain tube gasket, then the filter will self destruct blocking the oilways with disastrous results. If fitting such a filter system is desired, then a pressure actuated bypass valve should be fitted. Its probably best to fit a modern filter which has the bypass inegral with the unit.

ANSWER Robert, You might be interested in this earlier project, which began because the previous owner had fitted a clutch brake. This sat directly in front of the gearbox and made it impossible to attach a speedo cable! As an aside there is some folklaw that suggests the aluminium drive gear for the speedo drive is a bit of a liability and can distribute itself through the gearbox.

With this in mind, and the former practical problem, I made a separate drive taken from the prop shaft (A modern Hardy Spicer type). It may sound a bit Heath-Robinson when I say that the drive is supplied via a rubber band, but it is a modern polypropylene belt and so far has stood the test of time. I attach some photos. Dave

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