The Chelsea 890RHFJW-B5XS or 890RHFJWB5XS 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 uses an SAE C flange with an SAE C (XS) extended output shaft that moves the pump mounting flange to the rear of the transmission, improving pump clearance without the need for a separate extension. The one-piece main shaft eliminates input splines between the PTO and the output, and the clutch is positioned at the rear of the housing so the gear section tucks tightly against the transmission. Wet-spline output technology protects both the PTO and pump shaft under demanding, continuous-duty conditions. Continuous-duty torque rating for the 890 Series reaches up to 670 ft-lb, with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Call us to confirm proper fit for your specific Allison transmission configuration.
The Chelsea 890 Series fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate clearance. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment. The 890 Series can be configured for transmissions with or without a cooler, retarder, or both.
Features
Fits Allison 3000 MD and 4000 HD series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot-shift) engagement
SAE C (XS) extended output shaft moves pump flange to rear of transmission for improved clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Wet-spline output extends PTO and pump shaft life under continuous-duty conditions
Continuous-duty torque rating up to 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission: 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 Extended (XS) Output
- Outlet Flange Type: SAE C
- Lubricant: 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 fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate clearance. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. Common applications include aerial trucks, fire and rescue trucks, refuse trucks, truck cranes, and snow and ice equipment. The 890 Series can be configured for transmissions with or without a cooler, retarder, or both.
