The Chelsea 890UAFJW-B5XS or 890UAFJWB5XS is a hydraulic hot-shift Power Take-Off from the 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and uses an SAE C output flange with a Wet Spline output shaft that extends pump shaft life under continuous demand. The one-piece main shaft eliminates input splines between the PTO body and the output extension, and the clutch sits at the rear of the housing so the gear section tucks tightly to the transmission. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM, with intermittent torque rated at 501+ ft-lb and continuous torque up to 670 ft-lb. Engagement is hydraulic PowerShift. Contact Pro Gear and Transmission to confirm fit for your specific chassis and pump combination.
The Chelsea 890 Series is designed for applications where pump space is limited and high continuous torque is required. Typical uses include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. The housing and gear section mount between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate clearance. The 890 Series can be configured for transmissions with or without a cooler or retarder. Call Pro Gear and Transmission to confirm the right configuration for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift engagement for on-the-go activation
SAE C output flange with Wet Spline technology to protect pump shaft life
One-piece main shaft design removes input splines between PTO and output extension
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Continuous torque rating up to 670 ft-lb; intermittent torque rated at 501+ ft-lb
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C Wet Spline (XS)
- Product Series: 890
- Intermittent Torque: 501+ ft-lb (501+ Nm)
- Continuous Torque: Up to 670 ft-lb (908 Nm) - check application pages for actual torque ratings
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant Type: Wet Spline
Additional Information
The Chelsea 890 Series is designed for applications where pump space is limited and high continuous torque is required. Typical uses include aerial trucks, fire and rescue vehicles, refuse trucks, and truck cranes. The housing and gear section mount between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate clearance. The 890 Series can be configured for transmissions with or without a cooler or retarder. Call Pro Gear and Transmission to confirm the right configuration for your application.
