The Chelsea 890RFFJW-B5AF or 890RFFJWB5AF is a hydraulic PowerShift PTO assembly from the 890 Series, engineered 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 starting at 501 ft-lb. The SAE C (XS) output shaft uses wet-spline technology to extend PTO and pump shaft life under demanding conditions. A one-piece main shaft eliminates the input splines between the PTO and the output extension, and the extended shaft design moves the pump mounting flange to the rear of the transmission for improved clearance between the transmission and frame rail. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot shift) engagement
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
SAE C (XS) output shaft with wet-spline technology for extended shaft life
Extended shaft positions pump output at rear of transmission for improved pump clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- 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 at 500 RPM: 64 HP (48 kW)
- Shaft Power at 1000 RPM: 128 HP (95 kW)
Additional Information
