The Chelsea 897UAFJW-M5DA or 897UAFJWM5DA is a constant-mesh power take-off from the Chelsea 897 Series, built specifically for Allison 3000 and 4000 Series transmissions. The 897 Series relocates the PTO pump mounting flange to the rear of the transmission, tucking the housing tightly against the unit to improve pump clearance without sacrificing torque capacity. Mounting is 10-bolt with an SAE C outlet flange and SAE C output shaft configuration. Wet spline output technology extends PTO and pump shaft life under demanding, continuous-duty conditions. This single-unit design uses a one-piece main shaft, eliminating the input splines between the PTO body and output extension. Common applications include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Designed for Allison 3000 and 4000 Series transmissions
Constant mesh (constant engagement) shift type
10-bolt mounting with SAE C outlet flange and SAE C output shaft
Wet spline output extends PTO and pump shaft life in demanding applications
Rear-mounted pump flange improves clearance between PTO and frame rail
Single-unit construction with one-piece main shaft, no input splines between PTO body and output extension
Tech Specs
- Series: Chelsea 897
- Application: Allison 3000 and 4000 Series transmissions
- Shift Type: Constant Mesh (Constant Engagement)
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Lubrication: Wet Spline
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series is suited for applications requiring high torque output and tight pump clearance, including aerial platforms, fire and rescue trucks, refuse vehicles, pumper cleaners, and truck cranes. The series accommodates transmissions equipped with or without a cooler or retarder. The extended shaft design positions the hydraulic pump interface at the rear of the transmission, allowing adequate frame rail clearance. Wet Spline Technology at the output interface reduces wear on both the PTO and mating pump shaft under continuous or high-cycle duty. Part number 897UAFJW-M5DA or 897UAFJWM5DA is also referenced as SP897UAFJW-M5DA. Pro Gear and Transmission carries this Chelsea part for buyers in aerial, on-highway, defense, and other mobile equipment markets. Not sure this is your part? Give us a call.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
