The Chelsea 897JDFJW-M3CS or 897JDFJWM3CS is a constant-engagement Power Take-Off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series design moves the pump mounting flange to the rear of the transmission, allowing the gear section to tuck tightly against the transmission for improved clearance between the PTO and the frame rail. It mounts via a 10-bolt pattern with an additional rear-support bracket, and the output uses an SAE C flange and wet spline technology to extend pump shaft life under demanding, continuous-duty conditions. The one-piece main shaft eliminates the input splines that separate PTO body from output extension on conventional units. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call Pro Gear and Transmission to confirm this part fits your specific Allison configuration.
Features
Designed for Allison 3000 and 4000 Series transmissions
10-bolt mounting with additional rear-support bracket for added stability
Constant engagement (constant mesh) shift type
SAE C output flange and wet spline output shaft for extended pump shaft life
Pump interface located at the rear of the transmission for maximum pump clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Input Gear Designator: Allison World Transmissions (FJ)
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubricant/Spline Type: Wet Spline
- Intermittent Torque Rating: 501+ lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Product Series: 897
- Compatible Transmissions: Allison 3000 Series, Allison 4000 Series
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series is a single-unit PTO, not a PTO-with-extension combination. The series supports configurations for transmissions with or without a cooler, a retarder, or both. Wet Spline Technology on the output is a factory feature of all 897 Series units, extending service life for the PTO and pump shaft in high-cycle, heavy-duty applications. Common markets include aerial, fire and rescue, refuse, on-highway, defense, and other mobile equipment. The part may also be referenced as SP897JDFJW-M3CS in some catalog systems. Pro Gear and Transmission carries the Chelsea 897 Series line; call us to verify the correct configuration for your transmission and pump setup.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
