Greetings from Down-Under.
My astronomy group (we do public outreach) was recently gifted a C5 circa 1974 going by the serial number. It runs with a 12v to 110v inverter. This afternoon we plugged it in and can see that both motors are running. We removed the fork assembly from the base housing, removed one of the motors from the housing and lifted off the cap. The flywheel, if that's what it is, is spinning at a decent clip but the mount does not move at all, and it is locked. Left it running for an hour (before dismantling for a look) and there's no movement. The internals, the toothed gear and so on is pristine.
The scope has only been used a couple of times since it was purchased in Sydney and stored in its original case since then. The primary is in mint condition and there's a small spot of mould on the inside of the corrector plate which we'll get to. There's about six .965 eyepieces in boxes and film canisters. A T-ring for an unknown camera, counterweights and a diagonal. A couple of tubes that we have no idea what they're for, quite long actually. A D cell battery operated reticle eyepiece, the holder is corroded but nothing a bit of steel wool and contact cleaner won't fix, not that it will get used but nice to restore it to working order anyway.
We will mount it onto a Bunnings surveyors tripod, and will drill and tap the base of the wedge to 5/16" and repaint with some good matte black. There is some glue residue on the orange tube and we'll try and remove that with some acetone, maybe something was stuck there at some time or another.
So, some advice on why this little scope refuses to cooperate would be nice. Thanks for taking the time to read my first post.:-)