The Chelsea 897CAFJW-M3CK or 897CAFJWM3CK is a constant-engagement power take-off from the 897 Series, designed specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mount positions the SAE C output flange at the rear of the transmission, pushing the pump interface back for improved clearance between the pump and the frame rail. The one-piece mainshaft eliminates the input splines found on PTO-plus-extension designs, and the wet spline output extends service life on the PTO and pump shaft under demanding duty cycles. Intermittent torque capability for the 897 Series reaches 501 ft-lb and above, making this a common choice for aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Designed for Allison 3000 and 4000 Series transmissions
10-bolt mounting configuration
Constant-engagement (constant mesh) shift type
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft service life
Rear-of-transmission pump placement improves clearance between pump and frame rail
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Input Gear Designator: FJ - Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Lubricant Configuration: W - Wet Spline
- Transmission Fit: Allison 3000 Series, Allison 4000 Series
- Intermittent Torque: 501+ lb-ft (897 Series)
- Output Power: 56+ HP, 51+ kW (897 Series)
- Dimensions (H x W x L): 13 in. x 11 in. x 31 in.
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
