The Chelsea 897RDFJW-M5CZ or 897RDFJWM5CZ is a constant-engagement Power Take-Off from the 897 Series, designed specifically for Allison 3000 and 4000 Series transmissions. It uses a 10-bolt mounting configuration and positions the SAE C output flange at the rear of the transmission, moving pump clearance away from 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 continuous-duty conditions. The 897 Series suits demanding applications including aerial trucks, fire and rescue, refuse trucks, and truck cranes. Sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 and 4000 Series transmissions (FJ input gear designator)
Constant engagement (M) shift type, no clutching required
10-bolt mounting with additional rear-of-transmission support bracket
SAE C output flange and shaft, wet spline (W) for extended pump shaft life
One-piece main shaft, no input splines between PTO and output extension
Typical applications: aerial trucks, fire and rescue, refuse trucks, truck cranes
Tech Specs
- Series: Chelsea 897
- Full Part Number: 897RDFJW-M5CZ or 897RDFJWM5CZ
- Transmission Fit: Allison 3000 and 4000 Series (FJ = Allison World Transmissions)
- Shift Type: Constant Engagement (M)
- Mounting: 10-bolt
- Output Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline (W)
- Intermittent Torque Rating: 501+ lb-ft / 501+ Nm (series rating; continuous-duty rating is de-rated 30%)
- Output Power: 56+ HP / 51+ kW (series rating)
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series mounts like a standard side-mounted PTO but adds a bracket at the rear of the transmission for extra support. This single-unit design, not a PTO-plus-extension, keeps the housing and gear section tight to the transmission for improved frame-rail clearance. The wet spline output is particularly suited to high-demand hydraulic work where pump and PTO shaft wear is a concern. Common market segments include on-highway, aerial, defense, and other mobile equipment requiring high continuous torque and adequate pump clearance.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
