It's hardly sci.electronics, but this group seems more likely - has anyone done and significant teardown/lubricate on professional video "fluid" heads, e.g. Bogen/Manfrotto?
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Ask over at rec.video.production There'll be someone there that'll have the infoyou need.
I worked at Helix Ltd in Chicago for a while. Don't remember Bogens so much. Mostly OConners, Miller, I remember it took special spanners to dissasemble then and on the larger ones the centering springs could be very dangerous. Is it leaking? The OConners were notorious for this. Silicone oil? If they got bad we'd send them back to the factory.
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