The Chelsea 890HDFJW-G5XS is a hydraulic hot-shift Power Take-Off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, tucking the housing tightly against the transmission to maximize clearance between the PTO and the frame rail. The output is SAE C with an extended, one-piece main shaft that eliminates input splines between the PTO and output extension. Wet Spline Technology is standard on this unit, reducing wear on both the PTO and pump shaft under continuous demand. Shaft power delivery measures 64 HP at 500 RPM and 128 HP at 1,000 RPM. Continuous-duty torque rating reaches 670 ft-lb. This part is sold by Pro Gear and Transmission. Call us to confirm proper fit for your specific Allison-equipped application.
The Chelsea 890 Series is a single-unit PTO, not a PTO with a separate extension. The one-piece main shaft eliminates the input splines that typically exist between a PTO and an output extension. The clutch is located at the rear of the housing, allowing the gear section to sit close to the transmission for improved frame-rail clearance. The 890 Series can be configured for transmissions equipped with a cooler, a retarder, both, or neither. Typical applications include aerial trucks, fire and rescue apparatus, snow and ice control equipment, refuse trucks, pumper cleaners, and truck cranes.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic hot-shift (PowerShift) engagement
SAE C outlet flange with SAE C extended shaft output (XS)
Wet Spline Technology standard, reducing PTO and pump shaft wear
Continuous-duty torque rating up to 670 ft-lb; intermittent torque rated 501+ ft-lb
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic Hot Shift (PowerShift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C Extended (XS)
- Lubricant: Wet Spline
- Continuous Torque Rating: 670 lb-ft (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP
- Shaft Power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
- Product Series: 890
Additional Information
The Chelsea 890 Series is a single-unit PTO, not a PTO with a separate extension. The one-piece main shaft eliminates the input splines that typically exist between a PTO and an output extension. The clutch is located at the rear of the housing, allowing the gear section to sit close to the transmission for improved frame-rail clearance. The 890 Series can be configured for transmissions equipped with a cooler, a retarder, both, or neither. Typical applications include aerial trucks, fire and rescue apparatus, snow and ice control equipment, refuse trucks, pumper cleaners, and truck cranes.
