The Chelsea 890NFFJW-B3CF or 890NFFJWB3CF is a hydraulic hot-shift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses an SAE C ("XS") output flange with wet-spline technology to extend PTO and pump shaft life under demanding duty cycles. The unit delivers continuous-duty torque up to 670 ft-lbs and intermittent torque above 501 ft-lbs, with shaft power rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. The one-piece main shaft and rear-mounted clutch design tucks the housing tightly to the transmission, pushing the pump output flange rearward for improved clearance between the pump and frame rail. Common applications include aerial, fire and rescue, refuse, and truck crane platforms. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
10-bolt mounting for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") wet-spline output shaft extends PTO and pump shaft life
Continuous-duty torque rating up to 670 ft-lbs; intermittent torque 501+ ft-lbs
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft with rear-mounted clutch for improved pump clearance
Tech Specs
- Transmission Application: Allison 3000 MD Series and Allison 4000 HD Series
- Product Series: Chelsea 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C ("XS") Wet-Spline Output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lbs (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lbs
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP at 500 RPM; 128 HP at 1,000 RPM (48 kW at 500 RPM; 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.
