The Chelsea 890 Series Power Take-Off 890UBFJW-B5AF or 890UBFJWB5AF 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 flange at the rear of the transmission, fitting between the transmission and the frame rail to maximize clearance. The output is SAE C (XS) with a wet-spline interface, which extends PTO and pump shaft service life under demanding duty cycles. The unit delivers continuous-duty torque up to 670 ft-lb and intermittent torque rated at 501-plus ft-lb, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series is a single-unit design with a one-piece main shaft, eliminating input splines between the PTO body and the output extension. A genuine Chelsea part, available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output shaft with wet-spline lubrication to extend spline life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501-plus ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design - no input splines between PTO body and output extension
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) Wet Spline
- Outlet Flange Type: SAE C
- Continuous Torque Rating: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque Rating: 501-plus lb-ft
- Output Power: 56-plus HP (51-plus kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubrication: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
