a safety device for maintaining a load raised cylinder linkage in selected extended position . a combination cylinder engagement rod and locking sleeve with a piston rod engagement channel that will adjustably secure and extended piston rod from a cylinder assembly in a safe secure locked extended position . the cylinder safety stop of the invention is interposed between the cylinder sleeve and the piston end block by the incrementally adjustable engagement panel &# 39 ; s positioning via removably positioned stop adjustment pin . an intermediate incrementally adjustable fitting provides for positioning between multiple aligned stop pin engagement apertures .