The Chelsea 890HBFJW-B5ZS or 890HBFJWB5ZS 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 SAE C flange output at the rear of the transmission, moving the pump away from the frame rail to provide genuine clearance in tight installations. The one-piece main shaft eliminates the input splines between the PTO and the output extension, while Wet Spline technology on the output protects both the PTO and pump shaft under demanding duty cycles. Continuous-duty torque rating reaches 670 ft-lb, with intermittent torque rated at 501 lb-ft and above. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) output shaft and outlet flange
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501 lb-ft and above
Wet Spline output extends PTO and pump shaft life in demanding conditions
Extended one-piece main shaft positions the pump to the rear for improved 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)
- Outlet Flange Type: SAE C
- Continuous Torque Rating: 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 at 500 RPM; 128 HP at 1,000 RPM
- Lubricant/Spline: Wet Spline
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a support bracket at the rear of the transmission. The clutch is located at the rear of the PTO housing, allowing the gear section to sit close to the transmission for tighter clearance. Common applications for this series include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment. The 890HBFJW-B5ZS is also referenced as SP890HBFJW-B5ZS in some distributor catalog systems. Sold by Pro Gear and Transmission.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
