Draper 503094 Manual Backboard Height Adjuster for Fan Shaped Backboards. Operated with a removable awning-style crank handle and actuated via a 3/4" (19mm) –6 Acme threaded rod. Its actuator rod assembly is bolted in place and easily removed for conversion to electric operation.
Manual Height Adjuster Submittal
Manual Adjuster Instructions
Manual Height Adjuster Specifications