The Chelsea 897 Series Power Take-Off Assembly, part number 897HEFJW-M5XY or 897HEFJWM5XY, is a constant-mesh PTO engineered specifically for Allison 3000 and 4000 Series transmissions. It uses a 10-bolt mounting pattern and delivers an SAE C flange output with wet-spline technology to extend both PTO and pump shaft life under demanding duty cycles. The 897 Series continuous-duty torque rating reaches 670 ft-lb, with intermittent ratings above 501 ft-lb. Its one-piece main shaft eliminates the input splines found on extension-style units, and the pump interface positions at the rear of the transmission so the housing and gear section tuck tightly against the transmission for improved frame-rail clearance. Common applications include fire and rescue trucks, aerial trucks, truck cranes, and refuse equipment. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mounting
Constant-mesh (constant engagement) shift type for smooth, reliable power transfer
SAE C outlet flange and SAE C (XS) output shaft configuration
Wet-spline output extends PTO and pump shaft life in high-demand applications
Continuous-duty torque rating up to 670 ft-lb; intermittent torque rated above 501 ft-lb
One-piece main shaft and rear-mounted pump interface improve pump clearance between transmission and frame rail
Tech Specs
- Transmission Manufacturer: Allison 3000 / 4000 Series
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh (Constant Engagement)
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C / SAE C (XS)
- Lubricant: W - Wet Spline
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Continuous Torque: 670 lb-ft / 908 Nm (check application pages for actual torque ratings)
- Output Power: 56+ HP / 51+ kW
- Shaft Power at 500 RPM: 64 HP / 48 kW
- Shaft Power at 1000 RPM: 128 HP / 95 kW
Additional Information
