The Chelsea 890CDFJW-B3CS or 890CDFJWB3CS is a hydraulic PowerShift PTO assembly from the 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mounting configuration and features an SAE C ("XS") output shaft with Wet Spline technology to reduce wear on the PTO and pump shaft under demanding duty cycles. The 890 Series design moves the pump mounting flange to the rear of the transmission on a one-piece main shaft, eliminating input splines between the PTO and output extension for improved reliability. Continuous-duty torque reaches 670 lb-ft, with intermittent torque rated at 501+ lb-ft. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your specific transmission configuration.
The Chelsea 890 Series is a single-unit design that mounts like a standard side-mounted PTO while adding a rear bracket for transmission support. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for improved clearance between the unit and the frame rail. The 890 Series can be configured for transmissions with or without a cooler or retarder. Typical markets include aerial, fire and rescue, defense, on-highway, and other mobile applications. Part number 890CDFJW-B3CS is also referenced as SP890CDFJW-B3CS in some catalog systems.
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
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft eliminates input splines between PTO body and output extension for added durability
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline
- Continuous Torque: 670 lb-ft (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
Additional Information
The Chelsea 890 Series is a single-unit design that mounts like a standard side-mounted PTO while adding a rear bracket for transmission support. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for improved clearance between the unit and the frame rail. The 890 Series can be configured for transmissions with or without a cooler or retarder. Typical markets include aerial, fire and rescue, defense, on-highway, and other mobile applications. Part number 890CDFJW-B3CS is also referenced as SP890CDFJW-B3CS 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.
