The Chelsea 897LGFJW-M5XS or 897LGFJWM5XS is a constant-engagement (constant mesh) power take-off assembly built for Allison 3000 and 4000 Series transmissions. It uses a 10-bolt mounting configuration and features an SAE C output flange with wet-spline technology to extend PTO and pump shaft life in demanding hydraulic applications. The one-piece main shaft moves the pump mounting interface to the rear of the transmission, tucking the housing tightly against the unit for improved clearance between the PTO and the frame rail. Continuous-duty torque reaches 670 ft-lb (908 Nm); intermittent torque is rated at 501+ ft-lb. Shaft power output runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. A genuine Chelsea part sold by Pro Gear and Transmission. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mounting
Constant-engagement (constant mesh) shift type for continuous hydraulic operation
SAE C output flange with wet-spline technology for extended PTO and pump shaft life
One-piece main shaft positions pump interface at the rear of the transmission for improved frame-rail clearance
Continuous-duty torque rated up to 670 ft-lb (908 Nm); intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Manufacturer: Allison 3000 / 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 / Spline: 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.
