columbia

C

chucksue

Member
When the vacuum is applied to one side of the canister how does vent the other side?????? Mine doesn't want to shift all the way.
 
There are 2 hoses on the vacuum shift cylinder. The hose closest to the rear
shifts into when vacuum is applied. The hose near the right rear wheel shifts
out of Columbia when vacuum is applied to it. Easy to remember In is "in"
and out is 'Out" of Columbia. When vacuum is applied to either side the other
MUST be open to outside air or the cylinder won't move. The manual shifting
valve on the firewall of very early rears or the head mounted shifting valves
on the later models perform this function. MMO in the hose fittings of the rear
shifting cylinder lubricates and softens the leather cups making shift smooth
G.M.
 
I rebuilt it years ago probably 20 . It seamed to shift then. I bought the valve on the firewall and all the linkage from someone that was supplying replica units. I wonder if the grease is dried up. What kind of grease do you recommend. I thought about using synthetic. I also wonder about the vac. plate under the carb. I see you can buy them now. When I did the restoration I bought parts for the columbia from Dan Curayble. I probably butchered his last name. He was in California.
 
Years ago Tex Smiths' Magazine Hot Rod Mechanix had an article on how to make a control switch for a Columbia, out of a Chevrolet dual fuel tank switch. I have a copy out in the garage but I have not seen it for a while.
 
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