Features and specifications are subject to change without notice. Torque-Hub is a registered trademark of Fairfield Manufacturing Co. assumes no liability with respect to the use of the documentation described herein, or for any act or omission of Fairfield Manufacturing Co. 1 Torque-Hub Planetary Final Drive W3B/W3C Series Service Manual Rev 03/07/13 1Ģ While every precaution has been taken in the preparation of this document, Fairfield Manufacturing Co.