The Chelsea 890NHFJW-B3XY or 890NHFJWB3XY is a hydraulic hot-shift power take-off from the Chelsea 890 Series, purpose-built for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses a SAE C (XS) output shaft with wet-spline lubrication to extend PTO and pump shaft life under demanding duty cycles. The unit delivers a continuous torque rating of up to 670 ft-lb and intermittent torque above 501 ft-lb. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series design relocates the pump flange to the rear of the transmission, placing the output behind the gear section for improved pump clearance. The one-piece main shaft eliminates input splines between the PTO and the output extension. Common applications include aerial trucks, fire and rescue vehicles, and refuse trucks. Call us to confirm proper fit for your specific transmission configuration.
Features
Chelsea 890 Series, 10-bolt mount for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output shaft with wet-spline lubrication
Continuous torque rating up to 670 ft-lb; intermittent torque above 501 ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-mounted pump flange moves output behind the transmission for improved pump clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C (XS) wet-spline output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubrication: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
