The Chelsea 890 Series Power Take-Off (PTO), part number 890HFFJW-B5XY or 890HFFJWB5XY, is a hydraulic PowerShift unit 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 of 670 lb-ft, with intermittent torque capability of 501+ lb-ft. The SAE C ("XS") output shaft features Wet Spline Technology to reduce wear on both the PTO and pump shaft under demanding duty cycles. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. Unlike extension-based designs, the 890 Series uses a one-piece main shaft that eliminates input splines between the PTO and output extension, tucking the housing tightly against the transmission and moving the pump flange to the rear for improved clearance. Common applications include aerial trucks, fire and rescue vehicles, 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 (hot shift) engagement
Continuous-duty torque rating of 670 lb-ft; intermittent torque 501+ lb-ft
SAE C ("XS") output shaft with Wet Spline Technology for extended pump spline life
One-piece main shaft design eliminates input splines between PTO body and output extension
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Product Series: 890
- Transmission Fitment: Allison 3000 MD and 4000 HD Series (Input Gear Designator: FJ)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline (W)
- Continuous Torque: 670 lb-ft (908 Nm) - verify actual rating on application pages
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
