The Chelsea 890 Series Power Take-Off, part number 890FAFJW-D5XY or 890FAFJWD5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and uses a hydraulic PowerShift engagement. The SAE C ("XS") output shaft runs wet-spline lubrication to extend pump shaft life in demanding duty cycles. The one-piece main shaft eliminates input splines between the PTO and output extension, and the rear-mounted clutch positions the housing tightly against the transmission to clear the frame rail. Continuous-duty torque reaches 670 ft-lb; intermittent torque is rated at 501+ ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, 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 shaft with wet-spline lubrication for extended pump shaft life
Continuous-duty torque rating: 670 ft-lb; intermittent torque: 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft with rear-mounted clutch for improved frame-rail clearance
Tech Specs
- Transmission Application: Allison 3000 MD Series and 4000 HD Series
- Product Series: Chelsea 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Lubricant/Spline: Wet Spline
- Continuous-Duty Torque: 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 1,000 RPM: 128 HP (95 kW)
Additional Information
The 890 Series is a single, integrated unit - not a PTO with a bolt-on extension. The one-piece main shaft eliminates the input splines found between a conventional PTO body and an output extension, reducing potential failure points. The clutch sits at the rear of the PTO housing, allowing the gear section to tuck tightly against the transmission and fit between the transmission and the frame rail. The pump output is positioned to the rear of the transmission, providing clearance where space is most constrained. The 890 Series can be specified for transmissions equipped with a cooler, a retarder, both, or neither. Typical 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.
