The Chelsea 890HDFJW-B5AZ or 890HDFJWB5AZ is a 890 Series Power Take-Off Assembly built for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses hydraulic PowerShift engagement, so the PTO can be engaged under load without manual intervention. The SAE C ("XS") output flange and wet-spline output shaft extend pump spline life in demanding duty cycles. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM, with a continuous-duty torque rating up to 670 lb-ft. The 890 Series positions the pump mounting flange at the rear of the transmission, tucking the housing tightly against the transmission for improved pump clearance without requiring a separate extension. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift engagement for on-the-go PTO operation
SAE C ("XS") output shaft with wet-spline technology to extend pump spline life
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-mounted pump flange positions output behind the transmission for improved pump clearance
Tech Specs
- Transmission Fitment: 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") Wet Spline
- Continuous Torque: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant: Wet Spline
Additional Information
