Original DeWalt tensioning pulley — part N810076 — designed to restore correct chain / bar tension and smooth guidance in the drive/tensioning assembly. Precision-moulded to the factory fitment and indexed to the tool’s exploded diagram, it replaces the worn pulley that causes slack, noisy operation, or uneven chain travel. Example fits include DeWalt pole saw and pruning models such as DCMPS567 (Type 1 / P1 variants) and the DCPS620 (DCPS620B / DCPS620M1), so it’s a direct-fit repair item for those heads. If the tensioning wheel on your saw head is cracked, worn or seized, swapping in this original DeWalt N810076 restores proper tensioning action and alignment so the bar and chain run true.