The Chelsea 897LHFJW-M5XS or 897LHFJWM5XS is a constant-mesh power take-off from the Chelsea 897 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 897 Series design relocates the PTO and pump mounting flange to the rear of the transmission, giving the pump added clearance while the housing tucks tightly against the transmission to clear the frame rail. Mounting is 10-bolt with an SAE C outlet flange and SAE C output shaft. The output uses Chelsea's Wet Spline technology, which extends PTO and pump shaft life under demanding duty cycles. The one-piece main shaft eliminates input splines between the PTO and the output extension. Typical applications include aerial trucks, fire and rescue, 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
10-bolt mounting with SAE C outlet flange and SAE C output shaft
Constant-mesh (constant engagement) shift type
Wet Spline output extends PTO and pump shaft life in demanding conditions
Pump flange located at rear of 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)
- Input Gear: Allison World Transmissions (FJ designator)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline (W 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 mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. It is a single-unit design, not a PTO paired with a separate extension. The series accommodates transmissions equipped with or without a cooler, retarder, or both. Common vocational applications include aerial trucks, fire and rescue pumpers, refuse trucks, and truck cranes where both pump space and high torque capacity are priorities. Part number 897LHFJW-M5XS is also referenced as SP897LHFJW-M5XS in some catalog listings.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
