The Chelsea 897 Series Power Take-Off Assembly, part number 897HBFJW-M5AF or 897HBFJWM5AF, is a constant-engagement PTO engineered specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mounting configuration uses an FJ input gear set matched to Allison World Transmissions. A one-piece main shaft eliminates the input splines between the PTO gear section and the output extension, positioning the SAE C pump interface at the rear of the transmission so the housing tucks tightly inboard for improved frame-rail clearance. Wet Spline Technology is standard on all 897 Series units, reducing wear on the pump shaft interface in continuous-duty cycles. Continuous-duty torque capacity reaches 670 ft-lb (908 Nm); intermittent torque is rated at 501+ ft-lb (501+ Nm). Output power is 56+ HP (51+ kW), with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common platform applications include aerial trucks, fire and rescue pumpers, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
10-Bolt mounting for Allison 3000 and 4000 Series transmissions
Constant-engagement (constant mesh) output shift type
SAE C output flange and SAE C (XS) output shaft
Continuous-duty torque rating up to 670 ft-lb (908 Nm); intermittent torque 501+ ft-lb
Wet Spline Technology standard, extending PTO and pump shaft service life
One-piece main shaft positions pump interface at rear of transmission for improved clearance between housing and frame rail
Tech Specs
- Transmission Manufacturer: Allison 3000 and 4000 Series
- Mounting Type: 10-Bolt
- Input Gear Designator: FJ - Allison World Transmissions
- Output Shift Type: Constant Mesh (Constant Engagement)
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- Continuous Torque: 670 ft-lb / 908 Nm (verify actual rating on application pages)
- 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
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
