890LBFJW-B5AF Chelsea 890 Series PTO - Allison 3000/4000 Hydraulic PowerShift

The Chelsea 890LBFJW-B5AF is a hydraulic PowerShift Power Take-Off from the 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the pump mounting flange to the rear of the transmission, improving clearance between the PTO and the frame rail. The SAE C ("XS") output shaft uses Wet Spline lubrication to reduce wear on mating pump splines under heavy-cycle conditions. The one-piece main shaft eliminates input splines between the PTO and the output extension, and the clutch is located at the rear of the housing so the gear section sits tight against the transmission. Continuous-duty torque is rated up to 670 lb-ft. This part is also referenced as 890LBFJWB5AF. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.

Features

Fits Allison 3000 MD and 4000 HD Series transmissions (FJ input gear designator)
Hydraulic PowerShift engagement for hot-shift operation
10-bolt mounting with SAE C (XS) output flange
Wet Spline output extends PTO and pump shaft service life
One-piece main shaft eliminates intermediate input splines for improved driveline integrity
Pump flange positioned at the rear of the transmission for improved pump clearance
Continuous-duty torque rating up to 670 lb-ft; shaft power rated at 64 HP at 500 RPM and 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
• 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: 501+ lb-ft
• Output Power: 56+ HP
• Shaft Power: 64 HP at 500 RPM / 128 HP at 1,000 RPM
• Lubricant: Wet Spline

Additional Information

The Chelsea 890 Series mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for added support. It is a single-unit design, not a PTO paired with a separate extension, which keeps the overall package compact between the transmission and the frame rail. Typical applications include aerial trucks, fire and rescue trucks, snow and ice equipment, refuse trucks, pumper cleaners, and truck cranes. The unit can be ordered for transmissions equipped with or without a cooler, a retarder, or both.

Parts manual and diagrams: Chelsea 890 Series PTO parts list with prices