White 628 Tension Unit?
Working through inherited white 628 and thinking that the tension unit is in need of maintenance or replacement. The thread is very hard to pass through on any setting other that 1 or so. The tension disks look to have some grunge built up on the edges but based on the age I presume there could be wear moving toward the insides (away from the edges) of the disks
Would anyone have suggestions and perhaps a cross reference to other tension assemblies that might restore the function?