The Chelsea 897HEFJW-M5AF or 897HEFJWM5AF is a constant-engagement (constant mesh) Power Take-Off Assembly built for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C output flange at the rear of the transmission, moving the pump interface rearward so the housing and gear section tuck tightly against the trans for improved clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines found on conventional PTO-plus-extension setups. Intermittent torque rating exceeds 501 lb-ft, with continuous-duty torque up to 670 lb-ft. The wet-spline output lubricates the shaft interface to reduce wear in demanding duty cycles. Shaft power at 1,000 RPM reaches 128 HP. A genuine Chelsea 897 Series part, sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mount
Constant-engagement (constant mesh) shift type for continuous operation
SAE C outlet flange and SAE C (XS) output shaft
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Wet-spline output extends PTO and pump shaft life in demanding conditions
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Transmission Manufacturer: Allison 3000 / 4000 Series
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS)
- Lubricant: 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
