The Chelsea 897 Series Power Take-Off, part number 897TAFJW-M5XS or 897TAFJWM5XS, is a constant-mesh PTO engineered specifically for Allison 3000 and 4000 Series transmissions. Its 10-bolt mounting configuration positions the SAE C output flange at the rear of the transmission, moving the pump interface back for improved clearance between the pump and the frame rail. The one-piece main shaft eliminates input splines between the PTO body and the output extension. Wet Spline output technology extends pump shaft life under demanding duty cycles. The 897 Series is suited for aerial trucks, fire and rescue, refuse, and crane applications where pump space and high continuous torque are priorities. Call us to confirm proper fit for your application.
Features
Designed for Allison 3000 and 4000 Series transmissions with 10-bolt mounting
Constant-mesh (constant engagement) shift type for continuous-duty operation
SAE C output flange and SAE C output shaft type
Wet Spline output extends PTO and pump shaft life in demanding conditions
Pump interface located at the rear of the transmission for improved pump clearance
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)
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Lubricant/Output Feature: Wet Spline
- Transmission Fit: Allison 3000 and 4000 Series (FJ input gear designator)
- Series Intermittent Torque Rating: 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 with a separate extension. It mounts like a standard side-mounted PTO but includes an additional rear bracket at the transmission for added support. The housing and gear section tuck tightly to the transmission, while the extended shaft moves the pump output rearward for adequate clearance. Wet Spline technology lubricates the output splines continuously, reducing wear in high-cycle applications. Typical installations include aerial lift trucks, fire and rescue pumpers, refuse trucks, and truck-mounted cranes. Pro Gear and Transmission carries this Chelsea part - call us to confirm this is the correct PTO configuration for your transmission and chassis setup.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
