Kalart and Hugo Meyer side rangefinders were used on many makes of cameras and engage the focus rails similarly.
See: http://lommen9.home.xs4all.nl/kalart/ for good pictures. I found his "improved adjustment" to be close but not perfect for all Kalarts of that type but is indicative of the adjustment necessary to make the RF work properly.
Hugo Meyer adjustment procedure: http://www.graflex.org/speed-graphic/hugo-meyer.html
Kalart adjustment: http://www.graflex.org/speed-graphic...djustment.html ; http://www.cameraeccentric.com/html/info/kalart_1.html