The Chelsea 897RHFJW-M5XV or 897RHFJWM5XV is a constant-engagement Power Take-Off from the Chelsea 897 Series, engineered 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 housing, providing improved pump clearance over conventional side-mount designs. The one-piece main shaft eliminates input splines between the PTO and the output extension. Wet Spline technology on the output shaft extends service life under demanding duty cycles. The 897 Series is a single-unit assembly, not a PTO-with-extension combination, and can be configured for transmissions equipped with a cooler, retarder, or both. Typical platforms include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your application.
Features
Constant-mesh (constant engagement) operation for Allison 3000 and 4000 Series transmissions
10-bolt mounting configuration
SAE C output flange and output shaft type
Wet Spline output extends PTO and pump shaft service life
Single-unit assembly with one-piece main shaft, no PTO-plus-extension combination
Compatible with transmissions equipped with a cooler, retarder, or both
Tech Specs
- Series: Chelsea 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 Option: W - Wet Spline
- Intermittent Torque Rating: 501+ lb-ft
- Output Power: 56+ HP
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
The Chelsea 897 Series locates the pump interface at the rear of the transmission rather than the side, allowing the housing and gear section to sit tightly against the transmission for clearance between the PTO and the frame rail. This rear-mount design is particularly suited to high-torque, continuous-duty applications including fire and rescue pumpers, aerial platform trucks, refuse vehicles, and truck-mounted cranes. The series supports transmissions configured with or without a cooler or retarder. The Wet Spline output is a factory option coded "W" in the part number, providing lubrication at the pump-shaft interface to reduce wear in high-cycle operations.Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
