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Speed Graphic Bed Focusing Yoke

 
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sobahguy



Joined: 09 Oct 2001
Posts: 171
Location: Massachusetts

PostPosted: Sun Apr 24, 2011 2:31 am    Post subject: Speed Graphic Bed Focusing Yoke Reply with quote

A quick question I have is what have other users perhaps used to lubricate the bottom sides of the bed yoke? My focusing knobs are turning pretty sluggishly. Maybe 45PSS or Bert Saunders or someone familiar with servicing Graphics might be able to suggest something.
Best Regards and THANKS for any replies, SG.
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Les



Joined: 09 May 2001
Posts: 2682
Location: Detroit, MI

PostPosted: Sun Apr 24, 2011 3:16 am    Post subject: Reply with quote

I think originally they used a graphite grease, I use a lith white grease to lubricate the yoke to the rails (where most of the friction is) and the same on the gear rack, gear and axle.
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45PSS



Joined: 28 Sep 2001
Posts: 3233
Location: Mid Peninsula, Ca.

PostPosted: Sun Apr 24, 2011 4:46 am    Post subject: Reply with quote

White lithium grease or any medium weight grease on the pinion shaft and gears on the bottom of the yoke in a very thin layer as too much will migrate to the outside of the camera or your hands.

The same greases can be used on the yoke sides and bed guides but a just detectable trace is all that one wants there.
Household paraffin rubbed on the edges of the yoke that contact the bed guides is better.

Clean the focusing pinion gears and yoke with plastic safe degreaser before applying fresh lubricant.
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