The Chelsea 890HEFJW-B5XV or 890HEFJWB5XV is a hydraulic PowerShift PTO assembly engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. Part of the Chelsea 890 Series, this unit uses a 10-bolt mounting configuration and positions the SAE C output flange at the rear of the transmission, moving the pump mounting point rearward to gain clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines found on PTO-plus-extension arrangements, and the clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Wet-spline output technology protects the pump shaft interface under continuous-duty demand. The 890 Series delivers up to 670 ft-lb continuous torque and 128 HP at 1,000 RPM shaft output. Typical applications include aerial, fire and rescue, refuse, and truck crane equipment. Call us to confirm proper fit for your specific Allison transmission configuration.
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. It is a single integrated unit rather than a PTO paired with a separate output extension, making it well suited for aerial trucks, fire and rescue apparatus, snow and ice equipment, and refuse trucks where pump space is limited and high continuous torque is required.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") wet-spline output shaft extends pump shaft service life
Rear-positioned output flange improves pump-to-frame-rail clearance
One-piece main shaft eliminates intermediate input splines
Continuous torque up to 670 ft-lb; shaft output 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Fitment: Allison 3000 MD and 4000 HD Series
- Product Series: Chelsea 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") Wet Spline
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- Shaft Output Power: 64 HP at 500 RPM / 128 HP at 1,000 RPM
- Output Power: 56+ HP
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. It is a single integrated unit rather than a PTO paired with a separate output extension, making it well suited for aerial trucks, fire and rescue apparatus, snow and ice equipment, and refuse trucks where pump space is limited and high continuous torque is required.
