The Chelsea 897LFFJW-M5XY or 897LFFJWM5XY is a constant-engagement power take-off from the Chelsea 897 Series, purpose-built for Allison 3000 and 4000 Series transmissions. The 897 Series uses a 10-bolt mounting configuration and positions the pump mounting flange at the rear of the transmission housing, giving additional pump clearance compared to a standard side-mount PTO. The output is SAE C, and the unit uses wet spline technology to extend PTO and pump shaft life under demanding duty cycles. The series supports intermittent torque ratings above 501 lb-ft and output power above 56 HP. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, truck cranes, and snow and ice equipment. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 and 4000 Series transmissions
10-bolt mounting with rear pump flange location for improved pump clearance
Constant engagement (constant mesh) shift type
SAE C outlet flange and output shaft type
Wet spline output extends PTO and pump shaft life
Suited for aerial, fire and rescue, refuse, and truck crane applications
Tech Specs
- Product Series: 897
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement
- Input Gear Designator: Allison World Transmissions
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C
- Output Power: 56+ HP (51+ kW)
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Lubricant / Output: Wet Spline
- Transmission Fit: Allison 3000 Series, Allison 4000 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.
