The Chelsea 890 Series Power Take-Off, part number 890UBFJW-B5XV or 890UBFJWB5XV, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, tucking the housing tightly between the transmission and the frame rail for improved clearance without extension tubes. The main shaft is a single one-piece design, eliminating the input splines between the PTO and output extension. A Wet Spline output extends pump shaft life in demanding duty cycles. Continuous-duty torque rating reaches 670 ft-lb, with intermittent capacity above 501 ft-lb. Shaft power is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, refuse, and truck crane equipment. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C outlet flange with SAE C (XS) output shaft
Single one-piece main shaft eliminates input splines between PTO and output extension
Wet Spline output extends PTO and pump shaft life under demanding conditions
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 Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS)
- Lubricant: 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 1,000 RPM
Additional Information
The Chelsea 890 Series is purpose-built for applications where pump space is limited and high torque output is required. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for added support. The clutch is positioned at the rear of the unit, allowing the housing and gear section to sit close to the transmission case for maximum clearance. Because it is a single unit rather than a PTO with a bolt-on extension, there are no input splines between the PTO body and the output shaft. Typical applications include aerial trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice equipment. The unit can be ordered for transmissions equipped with or without a cooler or retarder.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
