The Chelsea 890MGFJW-B5XS or 890MGFJWB5XS 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 delivers an SAE C ("XS") output flange, putting shaft power at 64 HP at 500 RPM and 128 HP at 1000 RPM. Continuous-duty torque reaches 670 ft-lbs, with intermittent torque rated at 501+ lb-ft. The one-piece main shaft eliminates intermediate input splines, and the clutch is positioned at the rear of the PTO so the housing tucks tight against the transmission, relocating the pump mounting flange rearward for improved clearance between the pump and the frame rail. Wet-spline output lubrication extends pump shaft life in demanding service. Common applications include aerial trucks, fire and rescue vehicles, 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
SAE C ("XS") output shaft with wet-spline lubrication to extend pump shaft life
Continuous-duty torque rating up to 670 ft-lbs; intermittent torque 501+ lb-ft
One-piece main shaft eliminates input splines between PTO and output extension
Rearward pump location improves clearance between pump and frame rail
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") Output
- Outlet Flange Type: SAE C
- Continuous Torque: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP at 500 RPM; 128 HP at 1000 RPM
- Lubricant/Spline: 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.
