The Chelsea 890LGFJW-B5XY is a hydraulic PowerShift PTO assembly from the 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses an SAE C ("XS") output flange with wet-spline technology to extend pump shaft life in demanding duty cycles. Continuous torque rating reaches 670 ft-lb, with intermittent torque above 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 pump mounting flange at the rear of the transmission, improving pump clearance without requiring a separate extension -- the main shaft is one-piece, eliminating input splines between the PTO and the output extension. Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Part number 890LGFJW-B5XY or 890LGFJWB5XY, sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
890 Series hydraulic PowerShift (hot shift) operation for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting with an additional rear bracket for transmission support
SAE C ("XS") output shaft with wet-spline lubrication to extend PTO and pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design eliminates input splines between PTO body and output extension, improving pump 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") Wet Spline Output
- Continuous Torque Rating: 670 ft-lb (see application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- Output Power: 56+ HP (51+ 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.
