The Chelsea 890 Series Power Take-Off, part number 890UFFJW-B5AF or 890UFFJWB5AF, is a hydraulic PowerShift PTO 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 flange. The 890 Series positions the pump mounting flange at the rear of the transmission, gaining clearance where side-mounted PTOs fall short. A one-piece main shaft eliminates input splines between the PTO body and the output extension. The wet-spline output lubrication extends pump shaft service life in demanding duty cycles. Series continuous-duty torque is rated up to 670 ft-lb, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot shift) engagement
SAE C ("XS") output flange and shaft type
One-piece main shaft eliminates intermediate input splines for improved reliability
Wet-spline output lubrication extends PTO and pump shaft life
Series continuous-duty torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Compatibility: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- 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
- Product Series: 890
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is located at the rear of the PTO housing, allowing the gear section to tuck tightly against the transmission for improved pump clearance. It can be ordered for transmissions equipped with or without a cooler, retarder, or both. Typical applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
