The Chelsea 897HEFJW-M5XS or 897HEFJWM5XS is a constant-mesh Power Take-Off Assembly engineered for Allison 3000 and 4000 Series transmissions. The 897 Series uses a one-piece main shaft that positions the SAE C pump interface at the rear of the transmission, tucking the housing tightly against the unit for improved clearance between the PTO and the frame rail. Mounting is 10-bolt, consistent with standard side-mount PTO installation, with an additional rear-of-transmission bracket for support. Output engagement is constant mesh (M designation). The wet-spline output (W designation) reduces wear on the pump shaft interface in demanding duty cycles. Continuous-duty torque rating reaches 670 ft-lb; intermittent torque is rated at 501+ ft-lb. Output power is rated at 56+ HP. Shaft power at 1,000 RPM is 128 HP. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 and 4000 Series transmissions, 10-bolt mounting
Constant-mesh engagement (M designation) with SAE C output flange and shaft
Wet-spline output (W designation) reduces pump shaft wear in high-demand applications
One-piece main shaft positions pump interface at rear of transmission for improved frame-rail clearance
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
Tech Specs
- Transmission Manufacturer: Allison 3000 / 4000 Series
- Mounting Type: 10-Bolt
- Output Shift Type: Constant Mesh (M = Constant Engagement)
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS - Extended Shaft)
- Lubricant: W - Wet Spline
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Continuous Torque: 670 lb-ft / 908 Nm (verify against application pages for actual torque ratings)
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
Additional Information
