The Chelsea 897UFFJW-M5XV is a constant-mesh power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mounting configuration positions the SAE C output flange at the rear of the transmission, pushing the pump interface rearward to open clearance between the pump and the frame rail. A one-piece main shaft eliminates the input splines common to PTO-plus-extension setups. The wet-spline output extends service life on the PTO and pump shaft under continuous-duty cycles. The 897 Series carries a series-rated intermittent torque of 501-plus lb-ft and output of 56-plus HP, making it well suited for aerial trucks, fire and rescue apparatus, refuse trucks, and truck crane applications. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Chelsea 897 Series constant-mesh (constant engagement) power take-off
10-bolt mounting, fits Allison 3000 and 4000 Series transmissions
SAE C output flange and output shaft type
Wet-spline output extends PTO and pump shaft service life
Rear-mounted pump flange improves clearance between pump and frame rail
One-piece main shaft 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
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubricant / Output Feature: Wet Spline
- Series Intermittent Torque Rating: 501+ lb-ft
- Series Output Power: 56+ HP
- Product Series: 897
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series was designed as a single-unit PTO, not a PTO with a bolt-on extension. The housing and gear section tuck tightly against the Allison transmission while the pump interface moves rearward, providing clearance in tight frame-rail installations. Typical applications include aerial trucks, fire and rescue pumpers, snow and ice equipment, refuse trucks, and truck cranes where both pump space and high continuous-duty torque are priorities. The 897 Series accommodates Allison transmissions fitted with or without a cooler, a retarder, or both. Part number 897UFFJW-M5XV is also referenced as SP897UFFJW-M5XV. Contact Pro Gear and Transmission to verify compatibility with your specific transmission build.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
