The Chelsea 890 Series Power Take-Off, part number 890RDFJW-D5XS or 890RDFJWD5XS, 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 an SAE C (XS extended) output shaft, positioning the pump flange to the rear of the transmission for improved clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines between the PTO and output extension, while Wet Spline Technology protects the pump shaft in demanding duty cycles. Continuous torque rating reaches 670 ft-lbs, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue, refuse, and truck crane service. A genuine Chelsea part from Pro Gear and Transmission - call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C extended (XS) output shaft positions pump to the rear of the transmission for improved clearance
Wet Spline output extends pump shaft life in demanding conditions
Continuous-duty torque rating up to 670 ft-lbs; intermittent torque rated at 501+ ft-lbs
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
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 Extended (XS) Output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lbs (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lbs
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 64 HP (500 RPM), 128 HP (1,000 RPM)
- Lubricant/Spline Type: Wet Spline
Additional Information
The 890 Series is a single-unit design - not a PTO paired with a bolt-on extension. The main shaft is one piece, removing the input splines between the PTO body and the output extension. The clutch is located at the rear of the housing so the gear section sits tightly against the transmission, maximizing the available clearance between the pump and frame rail. An additional support bracket at the rear of the transmission supplements the standard side-mount bolt pattern. The 890 Series can be specified for transmissions equipped with a cooler, a retarder, both, or neither. Common service applications include aerial trucks, fire and rescue pumpers, refuse trucks, and truck cranes.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
