The Chelsea 890 Series Power Take-Off (part number 890XAFJW-D5AB or 890XAFJWD5AB) 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 a Hydraulic PowerShift engagement, making it compatible with live-shift hydraulic systems. The SAE C ("XS") output shaft pairs with an SAE C outlet flange, delivering a continuous torque rating of 670 lb-ft and intermittent torque above 501 lb-ft. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series relocates the pump mounting flange to the rear of the transmission, a one-piece main shaft design that eliminates the input splines between the PTO and output extension, improving pump clearance. Wet Spline technology on the output protects both the PTO and pump shaft under demanding duty cycles. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") output shaft with SAE C outlet flange
Continuous torque rating of 670 lb-ft; intermittent torque above 501 lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet Spline output extends PTO and pump shaft life; rear-mounted flange improves pump 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") Wet Spline
- Outlet Flange Type: SAE C
- Continuous Torque Rating: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque Rating: 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
- Lubricant: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
