The Chelsea 897 Series Power Take-Off, part number 897MDFJW-M5ZS or 897MDFJWM5ZS, is a constant-mesh PTO engineered specifically for Allison 3000 and 4000 Series transmissions. Its 10-bolt mounting configuration positions the SAE C output flange at the rear of the transmission, tucking the housing tightly against the transmission and pushing pump clearance rearward - a one-piece main shaft design that eliminates the intermediate input splines found in extension-based setups. The wet-spline output lubricates the PTO-to-pump interface continuously, reducing spline wear in demanding duty cycles. Continuous torque capacity for this series reaches 670 ft-lb; shaft power output at 1,000 RPM is rated at 128 HP. Applications include aerial trucks, fire and rescue, refuse, and truck crane work. Call us to confirm proper fit for your specific transmission build.
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 output flange with wet-spline technology to extend PTO and pump shaft life
One-piece main shaft eliminates intermediate input splines, improving durability
Rear-of-transmission pump interface improves clearance between housing and frame rail
Continuous torque capacity up to 670 ft-lb; 128 HP shaft power at 1,000 RPM
Tech Specs
- Transmission Application: 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 extended shaft)
- 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 1,000 RPM: 128 HP, 95 kW
Additional Information
