The Chelsea 897XDFJW-M5XS or 897XDFJWM5XS is a constant-engagement power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series positions the pump mounting flange at the rear of the transmission, giving improved pump clearance compared to a conventional side-mount design. A 10-bolt mounting pattern and SAE C output flange and shaft are standard across the series. The wet spline output extends PTO and pump shaft life under demanding duty cycles. Typical applications include aerial trucks, fire and rescue units, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Designed for Allison 3000 and 4000 Series transmissions
Constant engagement (constant mesh) shift type
10-bolt mounting with SAE C output flange and shaft
Wet spline output for extended PTO and pump shaft life
Pump flange positioned at rear of transmission for improved clearance
Suited for aerial, fire and rescue, refuse, and crane truck applications
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement
- Input Gear Designator: Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant / Output: Wet Spline
- Series: Chelsea 897
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP
Additional Information
The Chelsea 897 Series is a single-unit PTO, not a PTO with a separate extension. The main shaft is a one-piece design, eliminating input splines between the PTO body and the output extension. The housing and gear section tuck tightly against the transmission for clearance, while an additional rear bracket provides supplemental support. The 897 Series can be ordered for transmissions equipped with or without a cooler, a retarder, or both. This part is also referenced as SP897XDFJW-M5XS. Contact Pro Gear and Transmission to confirm the correct configuration for your chassis and transmission build.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
