Chelsea 890 Series Power Take-Off 890EDFJW-B5XY or 890EDFJWB5XY is a hydraulic hot-shift PTO built specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C pump output flange at the rear of the transmission, tucking the housing and gear section tightly against the transmission for improved clearance between the pump and the frame rail. The main shaft is a single one-piece design, eliminating the input splines that a PTO-plus-extension arrangement requires. The clutch sits at the rear of the unit, and the output runs wet-spline technology to extend pump shaft life under demanding duty cycles. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your specific Allison application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output shaft with wet-spline technology to extend pump and PTO shaft life
Single one-piece main shaft eliminates input splines between PTO and output extension
Extended shaft design moves pump output to the rear of the transmission for improved frame-rail clearance
Continuous-duty torque rating up to 670 ft-lbs; intermittent torque 501+ ft-lbs
Tech Specs
- Transmission Fit: 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) Wet Spline
- 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 (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant: Wet Spline
Additional Information
The Chelsea 890 Series is engineered for applications where pump space is limited and high torque output is required. Typical uses include aerial trucks, fire and rescue vehicles, snow and ice equipment, refuse trucks, pumper cleaners, and truck cranes. Unlike a standard PTO-with-extension setup, the 890 is a single integrated unit: the one-piece main shaft removes the intermediate input splines, and the clutch is positioned at the rear of the housing so the gear section sits as close to the transmission as possible. The unit can be ordered for Allison transmissions equipped with a cooler, a retarder, both, or neither. Part number 890EDFJW-B5XY is also referenced as SP890EDFJW-B5XY. Available from 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.
