The Chelsea 897TDFJW-M5AF or 897TDFJWM5AF is a constant-engagement power take-off designed specifically for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the pump output at the rear of the transmission, tucking the housing tightly against the transmission to maximize clearance between the pump and the frame rail. The one-piece main shaft eliminates input splines between the PTO and the output extension, reducing potential failure points. The SAE C output flange pairs with a wet-spline output shaft that extends service life in high-demand duty cycles. Continuous torque capacity reaches 670 ft-lb; intermittent torque is rated at 501 ft-lb and above. Shaft power at 1,000 RPM is 128 HP. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mounting
Constant-engagement (constant mesh) shift type for smooth, continuous operation
SAE C output flange with wet-spline output shaft for extended pump shaft life
One-piece main shaft eliminates inter-stage input splines
Pump output located at the rear of the transmission for improved frame-rail clearance
Continuous torque rating up to 670 ft-lb; shaft power reaches 128 HP at 1,000 RPM
Tech Specs
- Transmission Manufacturer: 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: Wet Spline
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Continuous Torque: Up to 670 lb-ft / 908 Nm (verify on 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
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
