The Chelsea 890RCFJW-B5AF or 890RCFJWB5AF is a hydraulic PowerShift PTO from the Chelsea 890 Series, designed specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses a one-piece main shaft that moves the SAE C ("XS") output flange to the rear of the transmission, placing the pump output behind the transmission for improved clearance between the pump and the frame rail. Continuous-duty torque rating reaches 670 ft-lb, with intermittent torque rated at 501+ ft-lb. Wet Spline output technology extends spline life on both the PTO and pump shaft under demanding duty cycles. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm fitment with your specific transmission configuration.
Features
Designed for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift engagement
10-bolt mounting with SAE C ("XS") output shaft
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Wet Spline output to extend PTO and pump shaft life
One-piece main shaft relocates pump output to rear of transmission for improved clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Output
- 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 (500 RPM) / 128 HP (1,000 RPM)
- Lubricant: Wet Spline
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission for added stability. Unlike extension-based designs, the 890 is a single unit with a one-piece main shaft, eliminating the input splines found between a PTO body and a separate output extension. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for better clearance in tight frame rail applications. Common applications for this series include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes where both pump space and high torque output are priorities.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
