Hasselblad 500 CM temporarily problem

Hello all! First post here. Thank you all for the great resources. So here is the problem:

I own a 1972 Hassy and it recently started giving me problems. The camera will temporarily not advance the film after firing. It's very odd and I can't figure it out. Sometimes it will remain jammed for a very long time. Sometimes if I jiggle the turn knob for a while it will release and allow me to advance the film. As far as I can tell there is no magic to how long it jams. Sometimes it will free up after a few seconds, and sometimes I will have to sit there like an idiot and fiddle with it for several minutes...

Any ideas?

Please Help!!

Sounds like gummy lube... A cla is probably in order


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