The Chelsea 890 Series Power Take-Off Assembly, part number 890LAFJW-B5XS or 890LAFJWB5XS, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mounting and positions the SAE C pump output flange at the rear of the transmission, tucking the housing tightly against the transmission to maximize clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines found in extension-based designs, and the clutch relocates to the rear of the PTO body to preserve that clearance. Wet-spline output lubrication protects the pump shaft interface in demanding, continuous-duty cycles. Continuous-duty torque reaches 670 ft-lb, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, refuse, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Hydraulic hot-shift (PowerShift) engagement for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with rear-of-transmission SAE C output flange for improved pump clearance
One-piece main shaft design eliminates inter-unit input splines for added durability
Wet-spline output lubrication extends PTO and pump shaft service life
Continuous-duty torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
Suited for aerial trucks, fire and rescue, refuse trucks, and truck crane applications
Tech Specs
- Transmission Manufacturer: Allison
- Product Series: 890
- Input Gear Designator: FJ - Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS Extended Shaft)
- Outlet Flange Type: SAE C
- Lubricant: W - 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 at 500 RPM / 128 HP at 1,000 RPM
Additional Information
