The Chelsea 897UAFJW-M5XY or 897UAFJWM5XY is a constant-mesh power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The design relocates the PTO pump mounting flange to the rear of the transmission, giving the pump and housing room to tuck tightly against the transmission while clearing the frame rail. Mounting is via a 10-bolt pattern with an additional rear-of-transmission support bracket. The output uses an SAE C flange and wet spline technology to extend PTO and pump shaft life under continuous-duty demand. Rated output exceeds 56 HP and 51 kW, with intermittent torque capacity above 501 lb-ft. A single one-piece mainshaft eliminates the input splines that connect a standard PTO to a separate output extension. Common applications include aerial trucks, fire and rescue apparatus, truck cranes, refuse trucks, and snow and ice equipment. Call us to confirm proper fit for your specific transmission configuration.
Features
Constant-mesh (constant engagement) shift type for Allison 3000 and 4000 Series transmissions
10-bolt mounting with additional rear-of-transmission support bracket
SAE C outlet flange and SAE C output shaft type
Wet spline output extends PTO and pump shaft life in demanding duty cycles
Output rated at 56+ HP (51+ kW); intermittent torque rated above 501 lb-ft
One-piece mainshaft design eliminates input splines between PTO body 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 Option: W - Wet Spline
- Output Power: 56+ HP, 51+ kW
- Intermittent Torque: 501+ lb-ft, 501+ Nm
- Product Series: 897
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series was developed for applications where pump space is at a premium and high torque is required. By locating the pump interface at the rear of the transmission rather than the side, the unit fits between the transmission and the frame rail without a separate PTO-to-pump extension. The 897 Series accepts transmissions configured with or without a cooler, retarder, or both. Wet Spline Technology lubricates the output spline interface continuously, reducing wear on both the PTO output and the mating pump shaft in aerial, fire and rescue, refuse, and crane service. The part number 897UAFJW-M5XY is also referenced as SP897UAFJW-M5XY. Part falls under NMFC Code 128520 - Hydraulic PTOs, Pumps, Motors, etc. Call Pro Gear and Transmission to verify the correct configuration for your transmission build.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
