The Chelsea 897 Series Power Take-Off Assembly, part number 897HDFJW-M5XK or 897HDFJWM5XK, is a constant-mesh PTO built specifically for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, allowing the gear housing to tuck tightly against the transmission for improved pump clearance. The output shaft is SAE C ("XS" extended shaft), and the unit uses Wet Spline Technology to reduce wear on the PTO and pump shaft splines under demanding duty cycles. Continuous-duty torque is rated up to 670 ft-lb; shaft power output reaches 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
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 outlet flange with extended SAE C ("XS") output shaft for improved pump clearance
Wet Spline Technology reduces wear on PTO and pump shaft splines
Continuous-duty torque rating up to 670 ft-lb; 128 HP shaft power at 1,000 RPM
One-piece main shaft design eliminates input splines between PTO body and output extension
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, Extended ("XS")
- Lubrication: Wet Spline
- Continuous Torque: 670 ft-lb / 908 Nm (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb / 501+ Nm
- 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
