The Chelsea 890 Series Power Take-Off, part number 890LAFJW-B5AF or 890LAFJWB5AF, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, giving the pump meaningful clearance between the transmission and the frame rail. A one-piece main shaft eliminates the input splines that a PTO-plus-extension setup would require. The SAE C output uses Wet Spline Technology to extend pump shaft life under demanding duty cycles. Continuous-duty torque is rated up to 670 ft-lb, with intermittent torque starting above 501 lb-ft. Shaft power at 1,000 RPM reaches 128 HP. Common applications include aerial trucks, fire and rescue units, 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 activation
SAE C ("XS") output shaft with Wet Spline Technology to extend pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ lb-ft
One-piece main shaft design eliminates input splines between PTO and output extension
Rear-of-transmission pump flange location improves clearance between transmission and frame rail
Tech Specs
- 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") Wet Spline
- Continuous Torque: Up to 670 lb-ft (check application pages for actual torque rating)
- 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
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
