The Chelsea 897 Series Power Take-Off, part number 897HCFJW-M5XK or 897HCFJWM5XK, is a constant-mesh PTO 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, tucking the housing and gear section tightly against the transmission to improve pump clearance between the unit and the frame rail. A one-piece main shaft eliminates input splines between the PTO and output extension. The SAE C output flange uses wet spline technology to extend PTO and pump shaft life under demanding, continuous-duty conditions. Mounting is 10-bolt. Common applications include aerial trucks, fire and rescue trucks, 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
Constant-mesh (constant engagement) shift type
10-bolt mounting configuration
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft life in demanding conditions
Pump flange relocated to rear of transmission for improved clearance between PTO and frame rail
Tech Specs
- Series: Chelsea 897
- Transmission Fit: Allison 3000 and 4000 Series
- Shift Type: Constant Mesh (Constant Engagement)
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Power: 56+ HP, 51+ kW
- Intermittent Torque: 501+ lb-ft
- Lubricant: 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 design eliminates the input splines that exist between a standard PTO and an output extension, improving drivetrain integrity. The unit mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. This design is well-suited to aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, pumper cleaners, and truck cranes where pump space is limited and high torque output is required. The 897 Series is available for transmissions configured with or without a cooler, retarder, or both.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
