The Chelsea 897RAFJW-M5ZS or 897RAFJWM5ZS is a constant-mesh power take-off engineered specifically for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C output flange to the rear of the transmission, locating the pump interface behind the gear section for improved clearance between the pump and the frame rail. The main shaft is a single one-piece design, eliminating the input splines found in PTO-plus-extension configurations. Wet Spline Technology lubricates the output shaft to extend spline life under demanding duty cycles. Continuous torque capacity reaches 670 lb-ft; intermittent torque is rated at 501+ lb-ft. Shaft power output is 64 HP at 500 RPM and 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 application.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mounting
Constant-mesh (constant engagement) shift type for smooth, continuous operation
SAE C output flange and SAE C extended shaft moves pump interface to rear of transmission for improved clearance
Wet Spline Technology lubricates output splines to extend PTO and pump shaft service life
Continuous torque rating up to 670 lb-ft; intermittent torque rated at 501+ lb-ft
Single one-piece main shaft eliminates input splines between PTO body and output extension
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
- Intermittent Torque: 501+ lb-ft, 501+ Nm
- Continuous Torque: 670 lb-ft, 908 Nm (verify actual rating on application pages)
- Output Power: 56+ HP, 51+ kW
- Shaft Power at 500 RPM: 64 HP, 48 kW
- Shaft Power at 1000 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.
