The Chelsea 890 Series Power Take-Off, part number 890XFFJW-B5XV or 890XFFJWB5XV, is a hydraulic hot-shift PTO designed specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the pump output to the rear of the transmission, providing improved pump clearance without requiring a separate extension. The output uses an SAE C ("XS") flange and wet-spline technology to extend pump shaft life under demanding duty cycles. Continuous-duty torque reaches 670 ft-lb, with intermittent torque rated at 501+ lb-ft. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. 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 mount
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") wet-spline output shaft for extended pump spline life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design locates pump output at rear of transmission for better 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 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 (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant: Wet Spline
Additional Information
The Chelsea 890 Series is a single-unit PTO, not a PTO combined with a separate extension. Its one-piece main shaft eliminates input splines between the PTO body and the output extension, and the clutch is positioned at the rear of the housing to allow the gear section to tuck tightly against the transmission. The unit mounts like a standard side-mounted PTO but includes an additional support bracket at the rear of the transmission. It can be ordered for transmissions equipped with or without a cooler, retarder, or both. Typical applications include aerial lift trucks, fire and rescue pumpers, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
