The Chelsea 890 Series Power Take-Off, part number 890NGFJW-B3CK or 890NGFJWB3CK, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and features an SAE C (XS) output shaft with wet-spline lubrication to extend PTO and pump shaft life under demanding duty cycles. The extended shaft design moves the pump mounting flange to the rear of the transmission, improving clearance between the pump and the frame rail. Continuous-duty torque reaches up to 670 ft-lb, with intermittent ratings exceeding 501 ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Typical applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your application.
The Chelsea 890 Series is a single-unit PTO, not a PTO with a bolt-on extension. Its one-piece main shaft eliminates the input splines between the PTO body and the output extension, and the clutch is positioned at the rear of the housing so the gear section sits tightly against the transmission for maximum clearance. The unit can be ordered for transmissions equipped with a cooler, a retarder, both, or neither. Common applications include aerial trucks, fire and rescue apparatus, pumper cleaners, truck cranes, and refuse trucks.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output shaft with wet-spline lubrication for extended spline life
Extended shaft relocates pump output to rear of transmission for improved pump clearance
Continuous-duty torque rating up to 670 ft-lb; intermittent torque exceeds 501 ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Application: Allison 3000 MD Series and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Lubricant/Spline Type: Wet Spline
- Continuous Torque: Up to 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
Additional Information
The Chelsea 890 Series is a single-unit PTO, not a PTO with a bolt-on extension. Its one-piece main shaft eliminates the input splines between the PTO body and the output extension, and the clutch is positioned at the rear of the housing so the gear section sits tightly against the transmission for maximum clearance. The unit can be ordered for transmissions equipped with a cooler, a retarder, both, or neither. Common applications include aerial trucks, fire and rescue apparatus, pumper cleaners, truck cranes, and refuse trucks.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
