The Chelsea 897XAFJW-M5XY or 897XAFJWM5XY is a constant-engagement power take-off engineered 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, tucking the housing tightly alongside the frame rail for improved pump clearance. The main shaft is a single one-piece design, eliminating the input splines between the PTO body and the output extension. Wet Spline Technology lubricates the output to extend pump shaft life in high-demand service. Continuous torque capacity reaches 670 ft-lb (908 Nm); intermittent torque is rated at 501+ ft-lb. Shaft output power reaches 128 HP at 1,000 RPM. Well-suited for aerial trucks, fire and rescue apparatus, refuse trucks, and truck crane applications. 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
SAE C outlet flange and SAE C extended (XS) output shaft
Wet Spline output extends PTO and pump shaft life in demanding conditions
Single one-piece main shaft eliminates input splines between PTO body and output extension
Continuous torque rating up to 670 ft-lb (908 Nm); shaft output 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 Extended (XS)
- Lubricant: Wet Spline (W)
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Continuous Torque: 670 lb-ft / 908 Nm (verify on application pages for actual rating)
- 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.
