Chelsea part number 890UDFJW-D5XV or 890UDFJWD5XV is an 890 Series Power Take-Off designed for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and shifts hydraulically (PowerShift hot-shift), making it usable under load. The SAE C ("XS") output shaft uses wet-spline technology to extend pump shaft life in demanding cycles. The 890 Series moves the pump mounting flange to the rear of the transmission, tucking the housing tightly against it while relocating the pump output rearward for clearance. Shaft power runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, refuse, and truck crane service. Call us to confirm proper fit for your application.
The Chelsea 890 Series is engineered as a single-unit PTO, not a PTO paired with a bolt-on extension. The clutch is positioned at the rear of the PTO housing so the gear section tucks tightly against the transmission, gaining clearance for the pump. The design is compatible with Allison 3000/4000 transmissions equipped with or without a cooler, retarder, or both. Typical service environments include aerial lift trucks, fire and rescue pumpers, snow and ice equipment, refuse trucks, and truck cranes where pump space is limited and high continuous torque is required.
Features
10-bolt hydraulic hot-shift (PowerShift) for Allison 3000 MD and 4000 HD Series transmissions
SAE C ("XS") wet-spline output shaft for extended PTO and pump shaft 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
Extended shaft design relocates pump mounting flange to rear of transmission for improved pump clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot-shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Wet Spline
- Lubricant Type: Wet Spline
- 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 (500 RPM), 128 HP (1,000 RPM) / 48 kW (500 RPM), 95 kW (1,000 RPM)
Additional Information
The Chelsea 890 Series is engineered as a single-unit PTO, not a PTO paired with a bolt-on extension. The clutch is positioned at the rear of the PTO housing so the gear section tucks tightly against the transmission, gaining clearance for the pump. The design is compatible with Allison 3000/4000 transmissions equipped with or without a cooler, retarder, or both. Typical service environments include aerial lift trucks, fire and rescue pumpers, snow and ice equipment, refuse trucks, and truck cranes where pump space is limited and high continuous torque is required.
