The Chelsea 897LDFJW-M5AZ or 897LDFJWM5AZ is a constant-mesh 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, improving pump clearance where space is tight. It mounts via a 10-bolt pattern like a standard side-mounted PTO, with an additional rear bracket for added support. The one-piece main shaft eliminates input splines between the PTO and output extension. The SAE C output flange uses wet spline technology to extend pump shaft life under continuous-duty demand. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Constant-mesh (constant engagement) design for Allison 3000 and 4000 Series transmissions
10-bolt mounting with additional rear bracket for transmission support
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft life in demanding applications
Pump interface located at rear of transmission for improved clearance
Single-unit design with one-piece main shaft - no input splines between PTO and output extension
Tech Specs
- 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
- Lubricant/Output: Wet Spline
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Transmission Fit: Allison 3000 Series, Allison 4000 Series
- Product Series: 897
Additional Information
The Chelsea 897 Series is purpose-built for applications where pump clearance and high torque output are primary concerns. Because the housing and gear section tuck tightly against the transmission while the pump interface extends to the rear, the 897 fits between the transmission and frame rail without requiring a separate extension unit. The series supports transmissions equipped with or without a cooler or retarder. Typical vocational uses include aerial platforms, fire and rescue apparatus, snow and ice control equipment, refuse trucks, pumper cleaners, and truck cranes. Part number 897LDFJW-M5AZ is also referenced as SP897LDFJW-M5AZ. Call Pro Gear and Transmission to confirm this part number matches your transmission build and configuration.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
