The Chelsea 890LEFJW-B5XV-1 or 890LEFJWB5XV1 is a 890 Series hydraulic hot-shift power take-off 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 at the rear of the transmission, moving the pump mounting point back to improve clearance between the pump and the frame rail. The one-piece main shaft eliminates the input splines typically found between a PTO and an output extension. Wet-spline output technology reduces wear on the pump shaft under demanding duty cycles. Continuous-duty torque for the 890 Series reaches 670 lb-ft, with intermittent torque rated at 501+ lb-ft. Shift is hydraulic PowerShift. Call Pro Gear and Transmission to confirm proper fit for your specific Allison-equipped truck.
The 890 Series fits between the transmission and the frame rail, locating the pump output at the rear of the transmission for adequate working space. The unit mounts like a standard side-mounted PTO but includes an additional support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO housing so the gear section tucks tightly against the transmission for improved clearance. 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 equipped with or without a cooler, a retarder, or both.
Features
10-bolt hydraulic hot-shift (PowerShift) design for Allison 3000 MD and 4000 HD Series transmissions
SAE C (XS) output shaft and outlet flange type
Continuous-duty torque rating: 670 lb-ft; intermittent torque: 501+ lb-ft
Shaft power output: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft eliminates input splines between PTO body and output extension
Wet-spline output extends PTO and pump shaft service life in high-demand applications
Tech Specs
- Product Series: 890
- Transmission Application: Allison 3000 MD and 4000 HD Series (Input Gear Designator: FJ)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) Output
- Lubricant/Output: 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 (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
Additional Information
The 890 Series fits between the transmission and the frame rail, locating the pump output at the rear of the transmission for adequate working space. The unit mounts like a standard side-mounted PTO but includes an additional support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO housing so the gear section tucks tightly against the transmission for improved clearance. 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 equipped with or without a cooler, a retarder, or both.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
