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Sub-platter “bottoming” on the top of the bearing house – check that there is a space of over 1mm or
over so between the top of the bearing house and the underside of the sub-platter
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The brass insert at the bottom of the bearing house has somehow got lost – this is very rare but it is just
possible – the bottom of the bearing house should be flat due to the presence of an insert sitting in the
bottom – you can feel this with a long thin screwdriver or use a torch – if the surface is coned as you
would expect in a drill hole then the insert is missing and you should request a new one.
