The Chelsea 897 Series Power Take-Off, part number 897LBFJW-M5XK or 897LBFJWM5XK, is a constant-engagement PTO engineered for Allison 3000 and 4000 Series transmissions. Its 10-bolt mounting interface and extended one-piece main shaft move the pump output flange to the rear of the transmission, placing the SAE C outlet flange behind the gear section to improve pump clearance and allow the housing to tuck tightly against the transmission. The wet-spline output (designated by the "W" in the part number) reduces wear on the PTO and pump shaft interface under continuous-duty loads. Continuous torque capacity reaches 670 lb-ft (908 Nm); shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 and 4000 Series transmissions via 10-bolt mount
Constant-engagement (constant mesh) shift type for smooth, on-demand power delivery
SAE C outlet flange with wet-spline output extends PTO and pump shaft service life
Extended one-piece main shaft relocates pump interface to the rear of the transmission for improved clearance
Continuous torque rating up to 670 lb-ft (908 Nm); shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
Suited for aerial, fire and rescue, refuse, and crane truck applications
Tech Specs
- Transmission Application: Allison 3000 and 4000 Series
- Mounting Type: 10-Bolt
- Shift Type: Constant Engagement (Constant Mesh)
- Output Shaft Type: SAE C
- Outlet Flange Type: SAE C
- Input Gear Designator: FJ - Allison World Transmissions
- Lubricant/Output: Wet Spline
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual torque ratings
- Output Power: 56+ HP (51+ kW)
- Shaft Power at 500 RPM: 64 HP (48 kW)
- Shaft Power at 1,000 RPM: 128 HP (95 kW)
Additional Information
Parts Manual: Chelsea 897 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
