The Chelsea 890LDFJW-B5ZS or 890LDFJWB5ZS 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 positions the SAE C output flange to the rear of the transmission, giving better pump clearance than a standard side-mounted PTO. The one-piece main shaft eliminates input splines between the PTO and the output extension, and Wet Spline technology on the output protects both the PTO and pump shaft in demanding duty cycles. Continuous-duty torque capacity reaches 670 ft-lb, with intermittent ratings above 501 ft-lb. Shaft power output runs 64 HP at 500 RPM and 128 HP at 1,000 RPM. Shift is hydraulic PowerShift. Call us to confirm proper fit for your transmission configuration.
The 890 Series fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate working space. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. The single-unit design uses a one-piece shaft, removing the input splines found on PTO-plus-extension configurations. Typical applications include aerial trucks, fire and rescue vehicles, refuse trucks, truck cranes, and snow and ice equipment.
Features
10-Bolt mounting for Allison 3000 MD and 4000 HD Series transmissions
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+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet Spline output extends PTO and pump shaft life in demanding applications
One-piece main shaft with rear-mounted clutch for tighter transmission clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ ft-lb
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP (48 kW) at 500 RPM; 128 HP (95 kW) at 1,000 RPM
- Lubricant/Output: Wet Spline
Additional Information
The 890 Series fits between the transmission and the frame rail, locating the pump output to the rear of the transmission for adequate working space. It mounts like a standard side-mounted PTO but includes an additional bracket at the rear of the transmission for support. The single-unit design uses a one-piece shaft, removing the input splines found on PTO-plus-extension configurations. Typical applications include aerial trucks, fire and rescue vehicles, refuse trucks, truck cranes, and snow and ice equipment.
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
