The Chelsea 890HEFJW-B5AZ or 890HEFJWB5AZ is a hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and uses a hydraulic hot-shift engagement. The output is SAE C ("XS") type with wet-spline technology to extend PTO and pump shaft life under demanding duty cycles. Continuous-duty torque capacity reaches 670 ft-lb, with intermittent torque rated at 501+ lb-ft. Shaft power output runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. The extended one-piece main shaft moves the pump mounting flange to the rear of the transmission, improving clearance between the pump and the frame rail. Common applications include aerial trucks, fire and rescue, refuse, and truck crane work. Call us to confirm proper fit for your transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") wet-spline output shaft for extended PTO and pump shaft life
Continuous-duty torque capacity up to 670 ft-lb; intermittent torque 501+ lb-ft
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Extended one-piece main shaft positions pump output at the rear of the transmission for improved clearance
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") Wet-Spline Output
- Outlet Flange Type: SAE C
- 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
- Lubrication: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
