The Chelsea 897 Series Power Take-Off, part number 897KAFJW-M5XS or 897KAFJWM5XS, is a constant-engagement PTO engineered specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mount positions the SAE C output flange at the rear of the transmission, moving the pump interface rearward to improve clearance between the pump and the frame rail. Unlike a PTO-plus-extension setup, the 897 Series uses a one-piece main shaft with no input splines between the PTO body and the output, reducing potential leak and wear points. Wet Spline technology on the output extends pump shaft life under demanding duty cycles. Typical installations 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 Power Take-Off, part number 897KAFJW-M5XS or 897KAFJWM5XS
Constant-engagement (constant mesh) shift type for Allison 3000 and 4000 Series transmissions
10-bolt mounting with SAE C outlet flange and SAE C output shaft
One-piece main shaft eliminates input splines between PTO body and output extension
Wet Spline output technology extends PTO and pump shaft life in high-demand applications
Intermittent torque rating: 501+ lb-ft; output power: 56+ HP - suited for aerial, fire and rescue, refuse, and crane truck applications
Tech Specs
- Series: Chelsea 897
- Shift Type: Constant Mesh (Constant Engagement)
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant / Output: Wet Spline
- Intermittent Torque Rating: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Input Gear Designator: FJ - Allison World Transmissions (Allison 3000/4000 Series)
- Application: Allison 3000 Series, Allison 4000 Series transmissions
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
