The Chelsea 897REFJW-M5XV or 897REFJWM5XV is a constant-mesh power take-off assembly from the 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and uses a one-piece main shaft that positions the SAE C output flange at the rear of the transmission, tucking the gear housing tightly inboard to maximize clearance between the pump and the frame rail. The wet-spline output extends pump shaft life under demanding duty cycles. Intermittent torque capacity exceeds 501 lb-ft; continuous-duty torque reaches up to 670 lb-ft (verify actual rating on the application pages). At 1,000 RPM the shaft delivers up to 128 HP. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. A genuine Chelsea part available from Pro Gear and Transmission. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mount
Constant-mesh engagement (Allison World Transmission input gear)
SAE C outlet flange with SAE C (XS) output shaft
Wet-spline output extends PTO and pump shaft life in demanding conditions
One-piece main shaft positions pump interface at the rear of the transmission for improved frame-rail clearance
Continuous-duty torque up to 670 lb-ft; intermittent torque 501+ lb-ft
Tech Specs
- Transmission Compatibility: Allison 3000 and 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 (XS)
- Lubricant/Output: Wet Spline
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Continuous Torque: Up to 670 lb-ft / 908 Nm (check application pages for actual rating)
- 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
