The Chelsea 890UAFJW-D5XY or 890UAFJWD5XY is a hydraulic hot-shift Power Take-Off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers a continuous-duty torque rating up to 670 ft-lb, with intermittent torque rated at 501+ lb-ft. The SAE C ("XS") output shaft and SAE C outlet flange handle demanding pump applications. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1000 RPM. The one-piece main shaft eliminates input splines between the PTO and output extension, and the wet-spline output lubrication extends pump shaft life in continuous-duty service. The clutch locates at the rear of the housing, positioning the pump output behind the transmission for improved clearance between the pump and frame rail. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic hot-shift (PowerShift) engagement
SAE C (XS) output shaft and SAE C outlet flange
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Wet-spline output lubrication extends PTO and pump shaft life in demanding conditions
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS)
- Lubricant/Output: Wet Spline
- Continuous Torque Rating: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP / 51+ kW
- Shaft Power at 500 RPM: 64 HP / 48 kW
- Shaft Power at 1000 RPM: 128 HP / 95 kW
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a rear bracket at the transmission for additional support. Unlike extension-style designs, the 890 is a single unit with a one-piece main shaft, eliminating the input splines between the PTO body and the output extension. The clutch is positioned at the rear of the PTO housing, allowing the gear section to tuck tightly against the transmission and locating the pump output to the rear for adequate clearance between the pump and the frame rail. The 890 Series is compatible with Allison transmissions equipped with or without a cooler, retarder, or both. Typical applications include aerial trucks, fire and rescue vehicles, refuse trucks, pumper cleaners, and truck cranes. Part number 890UAFJW-D5XY is also referenced as SP890UAFJW-D5XY. Sold by Pro Gear and Transmission.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
