The Chelsea 897 Series Power Take-Off, part number 897UDFJW-M5XS or 897UDFJWM5XS, is a constant-engagement PTO engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series mounts on a 10-bolt pattern and relocates the pump mounting flange to the rear of the transmission, tucking the housing and gear section tightly against the transmission body to improve pump clearance between the unit and the frame rail. Output is SAE C flange type with a wet spline interface, extending service life on the PTO and pump shaft in high-demand applications. The series carries an intermittent torque rating above 501 lb-ft and output above 56 HP, making it a fit for aerial work trucks, fire and rescue units, refuse trucks, and truck cranes. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Constant-engagement (constant mesh) shift type for Allison 3000 and 4000 Series transmissions
10-bolt mounting pattern
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft life in demanding conditions
Pump flange positioned at the rear of the transmission for improved clearance between unit and frame rail
Suited for aerial trucks, fire and rescue, refuse, and truck crane applications
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Input Gear Designator: FJ - Allison World Transmissions
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubricant/Output Interface: Wet Spline
- Intermittent Torque Rating: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
