The Chelsea 890REFJW-B5AZ or 890REFJWB5AZ is a hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses an SAE C (XS) output shaft with wet-spline lubrication to extend pump shaft life in demanding service. The one-piece main shaft eliminates the input splines found in PTO-plus-extension designs, and the clutch is positioned at the rear of the unit so the housing and gear section tuck tightly to the transmission, relocating the pump output rearward for improved clearance between the unit and the frame rail. Continuous-duty torque rating reaches 670 ft-lb, with intermittent capacity exceeding 501 ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue trucks, refuse trucks, and truck cranes. A genuine Chelsea part from Pro Gear and Transmission - call us to confirm proper fit for your specific Allison application.
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 for extended pump shaft life
Continuous-duty torque rating: 670 ft-lb; intermittent torque: 501+ ft-lb
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design relocates pump output to rear of transmission for improved clearance
Tech Specs
- Transmission: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS)
- Lubricant: Wet Spline
- 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
- Product Series: 890
Additional Information
