The Chelsea 890 Series Power Take-Off, part number 890UAFJW-D5XV or 890UAFJWD5XV, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 10-bolt mounting and rear-of-transmission pump placement tuck the unit tightly against the frame rail, giving pumps the clearance they need without extensions or adapters. A one-piece main shaft eliminates input splines between the PTO body and output, and Wet Spline output technology protects the pump shaft in demanding duty cycles. The SAE C output flange delivers a continuous torque rating of 670 lb-ft, with shaft power reaching 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 transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output flange and shaft
670 lb-ft continuous-duty torque rating; 501+ lb-ft intermittent torque
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet Spline output extends PTO and pump shaft life in high-demand service
One-piece main shaft eliminates spline interface between PTO body and output extension
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)
- Outlet Flange Type: SAE C
- Continuous Torque: 670 lb-ft (see 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
- Lubricant/Spline Interface: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit design - not a PTO with a bolt-on extension. The clutch is positioned at the rear of the PTO housing so the gear section nests tightly against the transmission, maximizing clearance between the pump flange and the frame rail. It mounts like a standard side-mount PTO but includes an additional support bracket at the rear of the transmission. The 890 Series accommodates Allison transmissions equipped with or without a cooler, a retarder, or both. Typical applications include aerial lift trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
