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Terry,OH · 06-16-2022, 05:47 PM

As mentioned above take the linkage off of the vacuum selector valve and use a large screwdriver in the valve try to rotate the valve so it goes fully from one stop to the other. There are spray lubricants you can use on the valve without damage to the O-rings. Such as LPS #1. It may be the mechanical linkage binding preventing full operation.

06-16-2022, 05:47 PM	#37
Terry,OH Senior Member Join Date: May 2010 Posts: 4,760	Re: Columbia not engaging As mentioned above take the linkage off of the vacuum selector valve and use a large screwdriver in the valve try to rotate the valve so it goes fully from one stop to the other. There are spray lubricants you can use on the valve without damage to the O-rings. Such as LPS #1. It may be the mechanical linkage binding preventing full operation.