The Chelsea 890UFFJW-D5AF or 890UFFJWD5AF is a hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series uses a one-piece main shaft that positions the pump mounting flange to the rear of the transmission, fitting between the transmission and the frame rail to improve pump clearance without a separate extension unit. The 10-bolt mount uses an SAE C outlet flange and SAE C ("XS") output shaft. Wet-spline technology lubricates the output splines for extended PTO and pump shaft life in demanding applications. Continuous-duty torque reaches 670 ft-lb with intermittent ratings at 501+ ft-lb, and shaft power output is 64 HP at 500 RPM or 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue units, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific truck configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions (10-bolt mounting)
Hydraulic PowerShift (hot shift) engagement for on-the-fly operation
SAE C ("XS") output shaft with SAE C outlet flange
Wet-spline output lubrication extends PTO and pump spline life
670 ft-lb continuous-duty torque rating; 501+ ft-lb intermittent torque
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft positions pump flange at rear of transmission for improved 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)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS")
- Lubricant/Output: Wet Spline
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- 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
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is located at the rear of the PTO housing so the gear section tucks tightly against the transmission, gaining clearance without requiring a separate extension piece. The 890 Series can be configured for transmissions 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 where pump space is limited and high torque output is required.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
