The Chelsea 890 Series Power Take-Off 890LEFJW-B5CZ or 890LEFJWB5CZ is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C pump output flange at the rear of the transmission, improving clearance between the pump and the frame rail without the need for a separate extension. The one-piece main shaft eliminates input splines between the PTO and output extension, and the clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Continuous-duty torque is rated at 670 ft-lb, with shaft power reaching 64 HP at 500 RPM and 128 HP at 1,000 RPM. Wet Spline output technology protects the pump shaft in demanding service. Typical applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) operation
Continuous-duty torque rating of 670 ft-lb; intermittent torque 501+ ft-lb
SAE C (XS) output shaft with Wet Spline technology to extend pump shaft life
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design locates pump output to rear of transmission for improved pump clearance
Tech Specs
- Transmission Application: Allison 3000 MD Series, Allison 4000 HD Series
- Product Series: 890
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C (XS) Output
- Outlet Flange Type: SAE C
- Lubricant: Wet Spline (W)
- Continuous Torque: 670 lb-ft / 908 Nm (see application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- 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 a separate extension. Its clutch is positioned at the rear of the housing, allowing the gear section to sit tight against the transmission body. This design is well-suited to applications where space between the transmission and frame rail is limited, including aerial trucks, pumper cleaners, refuse trucks, and truck crane installations. The 890 Series accommodates transmissions equipped with or without a cooler, a retarder, or both. Part number 890LEFJW-B5CZ is available from Pro Gear and Transmission. Not sure this is your part? Give us a call.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
