The Chelsea 897LEFJW-M5ZS 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 the pump interface rearward to improve clearance between the PTO and the frame rail. The one-piece mainshaft eliminates the input splines found on extension-style units, and the wet spline output extends pump shaft service life under continuous-duty demands. The 897 Series delivers intermittent torque ratings above 501 lb-ft and output power above 56 HP, making it well suited for aerial trucks, fire and rescue applications, refuse trucks, and truck cranes. Available from Pro Gear and Transmission.
Features
Fits Allison 3000 and 4000 Series transmissions (FJ input gear designator)
10-bolt mounting with additional rear bracket for added support
SAE C output flange and output shaft type
Constant engagement (M) shift type
Wet spline output extends PTO and pump shaft service life
Intermittent torque rating: 501+ lb-ft; output power: 56+ HP
Tech Specs
- Product Series: 897
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement
- Input Gear Designator: FJ (Allison World Transmissions)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant/Output: Wet Spline
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- Output Power: 56+ HP / 51+ kW
- Transmission Application: Allison 3000 Series, Allison 4000 Series
Additional Information
The 897 Series is a single-unit PTO, not a PTO with a separate extension. The one-piece mainshaft design removes the input splines between the PTO body and the output extension, reducing potential wear points. The pump interface is positioned at the rear of the transmission so the housing and gear section sit tightly against the transmission for improved frame-rail clearance. The unit mounts like a standard side-mounted PTO but adds a rear bracket for structural support. Typical applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
