The Chelsea 890LDFJW-B5AZ or 890LDFJWB5AZ is a hydraulic PowerShift PTO assembly from the Chelsea 890 Series, purpose-built for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mounting configuration and delivers an SAE C output shaft with wet-spline lubrication to reduce wear at the PTO-to-pump interface. The one-piece main shaft eliminates the input splines found in extension-style PTOs, and the clutch is positioned at the rear of the unit so the housing tucks tightly against the transmission, moving the pump flange rearward for clearance between the transmission and frame rail. Continuous-duty torque is rated at 670 ft-lb within the 890 Series. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1000 RPM. Common applications include aerial trucks, fire and rescue equipment, refuse trucks, and truck cranes. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
The Chelsea 890 Series fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for clearance where space is tight. The unit mounts like a standard side-mounted PTO but includes an additional rear bracket for support. Typical applications include aerial trucks, fire and rescue pumpers, refuse trucks, and truck cranes. The 890 Series can be configured for transmissions with or without a cooler or retarder.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C output shaft with wet-spline lubrication for extended pump spline life
One-piece main shaft eliminates input splines between PTO and output extension
Clutch positioned at rear of unit, moving pump flange rearward to maximize clearance between transmission and frame rail
Continuous-duty torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM and 128 HP at 1000 RPM
Tech Specs
- Transmission Fitment: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS) Wet Spline
- Outlet Flange Type: SAE C
- Lubricant Type: Wet Spline
- 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 1000 RPM
Additional Information
The Chelsea 890 Series fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for clearance where space is tight. The unit mounts like a standard side-mounted PTO but includes an additional rear bracket for support. Typical applications include aerial trucks, fire and rescue pumpers, refuse trucks, and truck cranes. The 890 Series can be configured for transmissions with or without a cooler or retarder.
