The Chelsea 897RFFJW-M5XS or 897RFFJWM5XS is a constant-mesh power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series relocates the PTO and pump mounting flange to the rear of the transmission, giving the pump significantly more clearance compared to a standard side-mounted unit. It uses a 10-bolt mounting configuration with an SAE C outlet flange and SAE C output shaft. The wet spline output extends PTO and pump shaft life under demanding duty cycles. The one-piece main shaft eliminates the input splines found on PTO-plus-extension designs. Typical applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 897 Series constant-mesh (constant engagement) power take-off
Designed for Allison 3000 and 4000 Series transmissions
10-bolt mounting with SAE C outlet flange and SAE C output shaft
Pump flange relocated to rear of transmission for improved clearance
Wet spline output extends PTO and pump shaft service life
Single-piece main shaft eliminates inter-stage input splines
Tech Specs
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Shift Type: Constant Mesh / Constant Engagement
- Input Gear Designator: FJ - Allison World Transmissions
- Lubricant / Output Option: W - Wet Spline
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP
- Transmission Fitment: Allison 3000 Series, Allison 4000 Series
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
