The Chelsea 890 Series Power Take-Off Assembly, part number 890UAFJW-B5XK or 890UAFJWB5XK, 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 uses an SAE C ("XS") output flange. The 890 Series positions the pump mounting flange to the rear of the transmission, tucking the housing tightly inboard for improved pump clearance. A single one-piece main shaft eliminates the input splines that separate-extension designs require. Wet-spline output technology reduces wear on both the PTO and pump shaft under demanding, continuous-duty cycles. The series carries a continuous torque rating up to 670 ft-lb and intermittent torque rated at 501+ ft-lb. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications for this series include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Hydraulic PowerShift (hot-shift) engagement for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with SAE C ("XS") output flange
Extended shaft design relocates pump output to rear of transmission for improved pump clearance
One-piece main shaft eliminates input splines between PTO and output extension
Wet-spline output technology extends PTO and pump shaft life under continuous-duty loads
Continuous torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM and 128 HP at 1,000 RPM
Tech Specs
- Transmission: 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") Output
- Outlet Flange Type: SAE C
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- Lubricant: Wet Spline
- Intermittent Torque: 501+ lb-ft
- Continuous Torque: Up to 670 lb-ft (verify actual rating on application pages)
- 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
