The Chelsea 897TDFJW-M5XS or 897TDFJWM5XS is a constant engagement (constant mesh) power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mounting design positions the SAE C output flange and shaft at the rear of the transmission, giving the pump adequate clearance between the transmission and the frame rail. The one-piece main shaft eliminates the input splines found on PTO-plus-extension setups. Wet Spline Technology at the output helps extend both PTO and pump shaft service life under demanding duty cycles. The 897 Series carries an intermittent torque rating above 501 lb-ft and output above 56 HP, making it a common choice for aerial trucks, fire and rescue units, truck cranes, and refuse vehicles. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 897 Series PTO designed for Allison 3000 and 4000 Series transmissions
10-bolt mounting with SAE C outlet flange and SAE C output shaft type
Constant engagement (constant mesh) shift type for continuous duty operation
Wet Spline output extends PTO and pump shaft life in demanding applications
Intermittent torque rating above 501 lb-ft with output above 56 HP
Rear-mounted pump interface improves clearance between transmission and frame rail
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Transmission Fit: Allison 3000 and 4000 Series
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output: 56+ HP / 51+ kW
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Lubricant Type: Wet Spline
- 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 a separate extension. The one-piece main shaft removes the input splines that exist between the PTO body and the output extension on multi-piece designs, reducing potential failure points. The housing and gear section tuck tightly to the transmission while the pump interface extends rearward, making this series well suited for applications where side-mounted space is limited. The 897 Series supports transmission configurations with or without a cooler, a retarder, or both. Typical markets include aerial, fire and rescue, defense, on-highway, and other mobile applications such as refuse trucks and truck cranes.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
