The Chelsea 890EFFJW-B5XS or 890EFFJWB5XS is a 890 Series hydraulic PowerShift power take-off built specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers a continuous-duty torque rating up to 670 ft-lb, with an intermittent torque rating of 501+ ft-lb. The SAE C ("XS") output shaft and SAE C outlet flange support demanding high-torque applications. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The one-piece main shaft eliminates the input splines between the PTO and the output extension, and wet-spline lubrication extends pump shaft life. The 890 Series positions the pump mounting flange at the rear of the transmission, improving pump clearance in tight frame-rail installations. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.

• Transmission Application: Allison 3000 MD and 4000 HD Series
• Product Series: 890
• Mounting Type: 10-Bolt
• Shift Type: Hydraulic PowerShift
• Outlet Flange Type: SAE C
• Output Shaft Type: SAE C ("XS")
• Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
• Intermittent Torque: 501+ ft-lb
• Output Power: 56+ HP (51+ kW)
• Shaft Power: 64 HP (500 RPM), 128 HP (1,000 RPM)
• Lubrication: Wet Spline

The 890 Series is designed as a single unit with a one-piece main shaft, eliminating input splines between the PTO body and the output extension. The clutch is located at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for improved clearance between the PTO and the frame rail. An additional support bracket at the rear of the transmission supplements the standard side-mount attachment. Typical applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment where high torque output and limited pump space are key requirements.