The Chelsea 890 Series Power Take-Off, part number 890RHFJW-B5XY or 890RHFJWB5XY, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. Its one-piece main shaft eliminates the input splines between the PTO and output extension, and the clutch is positioned at the rear of the housing so the gear section tucks tightly against the transmission. This moves the pump mounting flange rearward, creating clearance in tight frame-rail installations. The SAE C output uses Wet Spline Technology to extend pump shaft life under continuous use. The 890 Series mounts via a 10-bolt pattern and delivers continuous-duty torque up to 670 lb-ft, with shaft power of 64 HP at 500 RPM and 128 HP at 1000 RPM. Common applications include aerial trucks, fire and rescue equipment, 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 Technology for extended pump shaft life
Continuous-duty torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
One-piece main shaft and rear-mounted clutch design moves pump flange rearward for improved frame-rail clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Output Shaft Type: SAE C (XS) - Wet Spline
- Outlet Flange Type: SAE C
- Continuous Torque: 670 lb-ft (verify actual rating on application pages)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 64 HP (500 RPM), 128 HP (1000 RPM) / 48 kW (500 RPM), 95 kW (1000 RPM)
- Lubricant: 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.
