Have taken the back off and all the springs were disconnected from the bolts but that may have been me trying to adjust them last night. One spring was definitely out of alignment.
I have just reconnected all the bolts lining up the original red paint marks on the springs and it now seems ok although I am unsure what the clearance between the platter and plinth should be.
I don't have an original manual but I've just downloaded a PDF. Thank god for the internet.
The platter is now floating as it should be and there is no wobble plus its running totally silent so the motor seems in good order. What oil should be used on the sub platter spindle as i think its been off and on a few times and seems to act like a piston so may need a little topping up?
Thanks for all your help.
Is this worth it?
http://m.ebay.co.uk/itm/Jelco-SA-750...%257Ciid%253A1