This hydraulic cylinder positions and drives the reel on a combine header. It extends and retracts to adjust the reel’s fore-aft and vertical location relative to the cutterbar, controlling how crop material is fed into the auger. The cylinder body houses a piston and rod that convert hydraulic pressure into linear motion; the rod end connects to the reel arm assembly. Wear on the rod surface or internal seals leads to drift or slow response, which reduces feeding consistency and can cause material loss at the header. This component is manufactured to the original geometry so that the mounting brackets and pin bores align without modification. On installation, ensure the hydraulic lines are bled of air and that the rod-end clevis pin is secured with the specified retaining hardware.