The Chelsea 890 Series Power Take-Off, part number 890NEFJW-B3CS or 890NEFJWB3CS, 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 to the rear of the transmission, providing clearance that a standard side-mounted PTO cannot match. An additional bracket at the rear of the transmission adds support. The one-piece main shaft eliminates the input splines between the PTO body and the output extension. The SAE C output uses Wet Spline technology to extend pump shaft life under demanding duty cycles. Continuous-duty torque rating reaches 670 ft-lb, with intermittent torque rated at 501+ ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your application.
The Chelsea 890 Series is suited for aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, truck cranes, and other applications where pump clearance and high continuous torque are priorities. The unit mounts like a standard side-mounted PTO but adds a rear support bracket for stability. It can be ordered for transmissions with or without a cooler, retarder, or both.
Features
10-bolt mounting for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot shift) engagement
SAE C output shaft with Wet Spline technology to extend PTO and pump spline life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-of-transmission pump placement improves clearance versus standard side-mounted PTOs
Tech Specs
- Product Series: Chelsea 890
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") with Wet Spline
- Outlet Flange Type: SAE C
- Continuous Torque Rating: 670 ft-lb (Check application pages for actual torque ratings)
- Intermittent Torque Rating: 501+ ft-lb
- 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
The Chelsea 890 Series is suited for aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, truck cranes, and other applications where pump clearance and high continuous torque are priorities. The unit mounts like a standard side-mounted PTO but adds a rear support bracket for stability. It can be ordered for transmissions with or without a cooler, retarder, or both.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
