680 Series

The Chelsea 680 Series Power Take-Off (PTO) is a heavy-duty, cost-effective solution designed for high-torque vocational applications. Built with a durable cast iron housing and tapered cone bearings on the output shaft, the 680 Series delivers strong torque capacity and long service life in demanding operating environments. It is especially well suited for applications requiring increased power, such as pneumatic blowers and other high-demand mobile equipment. Designed with installation clearance in mind, the space-saving air shift cover helps maximize underbody space on the truck chassis. The PTO also uses heavy-duty tapered bearings on the input shaft instead of needle bearings, improving load-carrying capability and long-term durability under continuous use. Offering extensive configuration flexibility, the 680 Series includes 32 output options—such as Chelsea’s 360-degree rotatable flange for improved pump alignment—along with four internal speed ratios and ten shift options. This wide range of configurations makes it adaptable to a variety of vocational truck setups. The Chelsea 680 Series PTO is commonly used in aerial equipment, vocational and municipal vehicles, and other mobile applications. It is particularly effective in pneumatic blower systems and is compatible with a wide range of transmissions, including those with 8-bolt openings. A deep mount housing option is also available for select Mack transmission applications.