The Chelsea 897 Series Power Take-Off, part number 897UAFJW-M5XK or 897UAFJWM5XK, is a constant-engagement PTO engineered specifically for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt pattern and positions the pump output flange at the rear of the transmission, allowing the housing and gear section to tuck tightly against the transmission for improved pump clearance. The output shaft is SAE C with wet spline technology, which extends service life under demanding duty cycles. The one-piece main shaft eliminates the input splines between the PTO body and the output extension. Typical applications include aerial trucks, fire and rescue equipment, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Constant-mesh (constant engagement) design for Allison 3000 and 4000 Series transmissions
10-bolt mounting pattern with an additional rear bracket for transmission support
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft life in high-demand conditions
One-piece main shaft eliminates input splines between PTO and output extension
Suited for aerial, fire and rescue, refuse, and crane truck applications
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh (Constant Engagement)
- Input Gear Designator: Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline
- 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 897 Series is a single-unit PTO, not a PTO combined with a separate extension. The pump interface locates at the rear of the transmission so the housing tucks tightly against the frame rail, making it well suited for installations where side clearance is restricted. The series is compatible with Allison 3000/4000 transmissions configured with or without a cooler, a retarder, or both. Part number 897UAFJW-M5XK is also referenced as SP897UAFJW-M5XK in some catalog sources. Pro Gear and Transmission carries this Chelsea part for aerial, fire and rescue, snow and ice, refuse, and crane truck applications. Call us to confirm the right configuration for your transmission build.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
