The Chelsea 890 Series Power Take-Off, part number 890TEFJW-B5XS or 890TEFJWB5XS, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C pump output flange to the rear of the transmission, providing clearance that a conventional side-mount PTO cannot. The one-piece main shaft eliminates the input splines between the PTO and the output extension, and the clutch is located at the rear of the housing so the gear section sits tightly against the transmission. The wet-spline output is standard on this unit, reducing wear on both the PTO shaft and the pump drive. Continuous-duty torque is rated up to 670 lb-ft. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot-shift) engagement
SAE C output shaft with wet-spline technology to extend PTO and pump shaft life
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft and rear-located clutch move pump flange rearward 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 (hot-shift)
- Output Shaft Type: SAE C (XS extended output)
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- 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
Additional Information
The Chelsea 890 Series is designed for applications where pump space is limited and high torque is essential, including aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. Unlike a PTO paired with a separate extension, the 890 Series is a single integrated unit. An additional bracket at the rear of the transmission provides support beyond the standard side-mount attachment. The unit accommodates transmissions equipped with or without a cooler or retarder, or both, providing flexibility across a range of Allison-equipped vocational trucks.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
