I've recently acquired a Rexon RDM250F drill press in need of a little tlc but I'm puzzled by the belt change arrangement. It's the usual stepped pulley arrangment, one on the spindle and one on the motor, with an intermediate stepped pulley mounted on a swivelling crank. The motor slides backwards to tension the belts. As received, the crank faces towards the spindle pulley thus the belt from the spindle to the intermediate is at it's absolute slackest however is far too tight to allow it to be shifted onto another speed. I assume that the crank should be at some angle, perhaps 90 degrees to it's current position so as the motor shifts forwards so does the crank slackening both belts. Both belts seem to be original Taiwanese 'first rope' ones, I suspect that perhaps they have been inadvertantly interchanged, but without actually cutting the front belt there is no way I can get it off even with much levering and risking damage to the pulley.
Anyone come across this arrangement and can confirm my suspicions or maybe even have a manual for this drill?