The Chelsea 890 Series Power Take-Off, part number 890REFJW-D5XY or 890REFJWD5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 10-bolt mounting positions the pump output flange at the rear of the transmission, fitting between the transmission and the frame rail to maximize pump clearance without a separate extension housing. The main shaft is a single one-piece design, eliminating intermediate input splines. Wet Spline output technology extends PTO and pump shaft service life. The SAE C output delivers continuous torque up to 670 ft-lb, with shaft power rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. 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 (XS) output flange and shaft
Single one-piece main shaft eliminates intermediate input splines for improved reliability
Wet Spline output extends PTO and pump shaft life in demanding service
Continuous-duty torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM and 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 (XS) Output
- Outlet Flange Type: SAE C
- 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 at 500 RPM, 128 HP at 1,000 RPM
- Lubricant: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit design, not a PTO paired with a bolt-on extension. The clutch is located at the rear of the PTO housing, allowing the gear section to mount tightly against the transmission for maximum clearance between the pump and the frame rail. An additional bracket at the rear of the transmission provides supplemental support. The unit can be ordered for transmissions equipped with or without a cooler, retarder, or both. Typical service environments include aerial work platforms, fire and rescue apparatus, snow and ice control vehicles, refuse packers, and truck cranes. Part number 890REFJW-D5XY is also referenced as SP890REFJW-D5XY. Not sure this is your part? Give us a call.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
