The Chelsea 523 Series Power Take-Off, or P.T.O., is a two-gear designed rear mount P.T.O., which provides users with a compact housing that helps eliminate clearance issues. High-capacity bearings and superior gear designs provide users with torque ratings up to 260 ft/lbs (350 Nm). The 523 has 17 mounting adapters that will allow it to fit on 131 transmissions. It features four shift options, which are integrated into the P.T.O. housing for a space-saving design. The cam lock shift mechanism provides users with a positive engagement for each shift cycle. The 523 has two speed ratios available to meet application requirements. The four direct mount pump flange options come standard with the wet spline design.