The Chelsea 897CEFJW-M3ZS or 897CEFJWM3ZS is a constant-engagement power take-off from the Chelsea 897 Series, designed specifically for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C outlet flange at the rear of the transmission, moving the pump interface rearward for improved clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines found in PTO-plus-extension designs. Wet spline output technology extends service life on the PTO and pump shaft in demanding, continuous-duty conditions. The 897 Series intermittent torque rating exceeds 501 lb-ft. Common applications include aerial trucks, fire and rescue apparatus, 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 engagement (constant mesh) shift type
10-bolt mounting pattern
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft service life
Rear-of-transmission pump interface improves clearance between pump and frame rail
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement
- Input Gear Designator: FJ - Allison World Transmissions
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubricant: W - Wet Spline
- Series Intermittent Torque: 501+ lb-ft
- Series Output Power: 56+ HP
- 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 paired with a separate extension. The one-piece main shaft design eliminates the input splines between the PTO body and the output extension, reducing potential wear points. The housing and gear section tuck tightly against the transmission for improved clearance, while an additional support bracket at the rear of the transmission provides stability. The rear-mounted pump interface makes this series a common choice for aerial trucks, fire and rescue trucks, pumper cleaners, refuse trucks, and truck cranes where pump space is limited and continuous-duty torque is required.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
