The Chelsea 890 Series Power Take-Off Assembly, part number 890HBFJW-B5AZ or 890HBFJWB5AZ, is a hydraulic hot-shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the SAE C output flange to the rear of the transmission, improving pump clearance without the need for a separate extension shaft. The main shaft is a one-piece design that eliminates input splines between the PTO and output extension. A wet-spline output extends pump shaft life in demanding service. Continuous-duty torque reaches 670 ft-lb, and shaft power measures 64 HP at 500 RPM or 128 HP at 1,000 RPM. Common applications include fire and rescue trucks, aerial units, refuse trucks, and truck cranes. Call us to confirm proper fit for your transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output flange and shaft type
One-piece main shaft eliminates input splines between PTO body and output
Wet-spline output extends PTO and pump shaft life in demanding conditions
Continuous-duty torque rating up to 670 ft-lb; 128 HP shaft power at 1,000 RPM
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Continuous Torque Rating: 670 lb-ft (see application pages for confirmed 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
- Lubrication: Wet Spline
- Product Series: 890
Additional Information
