The Chelsea 897 Series Power Take-Off, part number 897NDFJW-M3ZS or 897NDFJWM3ZS, is a constant-mesh PTO engineered specifically for Allison 3000 and 4000 Series transmissions. Its 10-bolt mounting configuration positions the SAE C outlet flange at the rear of the transmission, moving the pump interface rearward to improve clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines typically found between a PTO and an output extension, keeping the unit compact. Wet Spline technology on the output shaft reduces wear on both the PTO and pump shaft under continuous-duty, high-torque operation. The 897 Series is a single unit, not a PTO-plus-extension assembly. Pro Gear and Transmission carries this genuine Chelsea part. Call us to confirm proper fit for your application.
Features
Designed for Allison 3000 and 4000 Series transmissions
Constant-mesh (constant engagement) shift type
10-bolt mounting configuration
SAE C outlet flange and output shaft type
Wet Spline output extends PTO and pump shaft service life
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Series: Chelsea 897
- Shift Type: Constant Mesh (Constant Engagement)
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Lubrication: Wet Spline
- Transmission Fitment: Allison 3000 Series, Allison 4000 Series
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP
- NMFC Code: 128520 (Hydraulic PTOs, Pumps, Motors, etc.)
Additional Information
The 897 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The pump interface locates to the rear of the transmission, allowing the housing and gear section to sit tightly against the transmission body for improved clearance with the frame rail. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment. The 897 Series can be configured for transmissions equipped with or without a cooler, retarder, or both.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
