The Chelsea 897LDFJW-M5AF or 897LDFJWM5AF is a constant-mesh power take-off assembly built for Allison 3000 and 4000 Series transmissions. The 897 Series mounts via a 10-bolt pattern and positions the SAE C pump output flange at the rear of the transmission, giving the housing and gear section room to tuck tightly against the transmission and fit between the frame rail without interference. The main shaft is a single-piece design, eliminating the input splines that a PTO-plus-extension arrangement would require. Output uses Wet Spline Technology to extend PTO and pump shaft life under demanding, continuous-duty loads. Continuous-duty torque capacity reaches 670 ft-lb (908 Nm); intermittent torque is rated at 501+ ft-lb. Shaft power at 1,000 RPM is 128 HP. Typical applications include aerial trucks, fire and rescue, truck cranes, and refuse equipment. 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, continuous power delivery
SAE C outlet flange and SAE C (XS) output shaft with Wet Spline lubrication to extend pump shaft service life
Single one-piece main shaft eliminates input splines between PTO and output extension
Continuous-duty torque rating up to 670 ft-lb (908 Nm); intermittent torque 501+ ft-lb
Pump flange relocated to rear of transmission for improved clearance between housing and frame rail
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)
- Lubricant: Wet Spline
- Continuous Torque: 670 ft-lb / 908 Nm (see 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
