I'm not sure how the devices were zeroed. This will probably be an issue when we put it back together. I think some of the gears could be loosened on the shaft

I'm not sure how the devices were zeroed. This will probably be an issue when we put it back together. I think some of the gears could be loosened on the shaft so they could be rotated to the correct point. The manual defines the zero points for all the synchros, i.e. 0° means X pressure or Y temperature, so I guess you'd adjust everything to those points.