The Chelsea 890 Series Power Take-Off, part number 890TEFJW-B5XK or 890TEFJWB5XK, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses a one-piece main shaft - no input splines between the PTO body and output extension - which moves the SAE C pump mounting flange rearward for improved clearance between the pump and the frame rail. The wet-spline output lubricates the shaft interface continuously, reducing wear in demanding duty cycles. Continuous-duty torque for the 890 Series reaches up to 670 ft-lb, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift engagement for on-the-go operation
SAE C ("XS") output shaft with wet-spline lubrication to extend pump shaft life
One-piece main shaft eliminates input splines between PTO and output extension
Rear-mounted pump flange improves clearance between pump and frame rail
Continuous-duty torque up to 670 ft-lb; shaft power 64 HP at 500 RPM and 128 HP at 1,000 RPM
Tech Specs
- Product Series: 890
- Transmission Application: Allison 3000 MD and 4000 HD Series (Input Gear Designator: FJ)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") with Wet Spline
- Lubricant: Wet Spline (W)
- Continuous Torque: Up to 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 as a single-unit PTO, not a PTO paired with a separate extension. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit flush against the transmission and maximize clearance for the pump. A supplemental bracket at the rear of the transmission provides additional support. This layout makes the 890 Series well suited for aerial trucks, fire and rescue apparatus, refuse trucks, pumper cleaners, and truck cranes - applications where both pump clearance and high continuous torque are critical. The unit accommodates Allison transmissions fitted 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.
