The Chelsea 890LGFJW-B5AZ or 890LGFJWB5AZ is a hydraulic PowerShift PTO engineered for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers an SAE C output shaft with Wet Spline technology to extend pump shaft life under demanding duty cycles. Continuous torque rating reaches 670 ft-lb, with intermittent torque rated at 501+ ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series design positions the PTO mounting flange to the rear of the transmission, improving pump clearance without the need for a separate extension unit. A one-piece main shaft eliminates input splines between the PTO and output extension. Common applications include aerial trucks, fire and rescue vehicles, and refuse trucks. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions (FJ input gear designator)
Hydraulic PowerShift (hot shift) engagement
10-bolt mounting with SAE C outlet flange
Wet Spline output extends PTO and pump shaft life
Continuous torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Extended shaft positions pump output to rear of transmission for improved clearance
Tech Specs
- Transmission Manufacturer: Allison
- Product Series: 890
- Input Gear Designator: FJ - Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) Wet Spline
- Lubricant: Wet Spline (W)
- 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 at 500 RPM / 128 HP at 1,000 RPM (48 kW at 500 RPM / 95 kW at 1,000 RPM)
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
