The Chelsea 890 Series Power Take-Off, part number 890CCFJW-B3CK or 890CCFJWB3CK, is a hydraulic PowerShift 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 to the rear of the transmission, giving the pump meaningful clearance inside the frame rail. A one-piece main shaft eliminates the input splines found in PTO-plus-extension setups, and the clutch locates at the rear of the housing so the gear section sits tightly against the transmission. The SAE C output shaft uses Wet Spline technology to extend spline life under demanding duty cycles. Continuous-duty torque capacity reaches 670 ft-lb, with intermittent ratings starting above 501 ft-lb. Shaft power at 1,000 RPM is 128 HP. Suited for aerial trucks, fire and rescue, snow and ice, and refuse applications. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions (FJ input gear designator)
Hydraulic PowerShift (hot shift) engagement
10-bolt mounting; locates pump output to the rear of the transmission for improved clearance
SAE C (XS) output shaft with Wet Spline technology for extended PTO and pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Manufacturer: Allison
- Product Series: 890
- Input Gear Designator: FJ - 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
- Lubricant: W - Wet Spline
- Continuous Torque: 670 lb-ft (see application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 64 HP (500 RPM), 128 HP (1,000 RPM) / 48 kW (500 RPM), 95 kW (1,000 RPM)
Additional Information
The Chelsea 890 Series is a single-unit PTO, not a PTO paired with an extension tube. Its one-piece main shaft eliminates the inter-unit input splines that are a common wear point on extension-style setups. The clutch assembly is positioned at the rear of the housing, allowing the gear section to nest tightly against the transmission and clear the frame rail. Unlike a standard side-mounted PTO, the 890 Series also includes a support bracket at the rear of the transmission for added rigidity. Typical applications include aerial work trucks, fire and rescue pumpers, refuse trucks, and truck-mounted cranes, where pump clearance and sustained high-torque output are both critical requirements. The 890 Series can be configured for transmissions equipped with a cooler, a retarder, both, or neither. Part number 890CCFJW-B3CK is also referenced as SP890CCFJW-B3CK in some catalog systems.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
