The Chelsea 890 Series Power Take-Off, part number 890CCFJW-B3CF or 890CCFJWB3CF, is a hydraulic hot-shift PTO built specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, keeping the housing and gear section tight to the transmission for improved clearance between the PTO and the frame rail. The one-piece main shaft eliminates input splines between the PTO body and the output extension. Output uses SAE C ("XS") flange geometry with a wet-spline interface that extends pump and PTO shaft life under demanding duty cycles. Continuous-duty torque reaches 670 ft-lb, with intermittent torque capability beyond 501 ft-lb. Shaft power is 64 HP at 500 RPM and 128 HP at 1,000 RPM. An additional bracket at the rear of the transmission provides supplemental support. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mount
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") output with wet-spline technology to extend pump and PTO shaft life
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
One-piece main shaft and rear-positioned clutch improve pump clearance between transmission and frame rail
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") Output
- Outlet Flange Type: SAE C
- Lubricant Interface: Wet Spline
- Continuous-Duty 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
Additional Information
The Chelsea 890 Series is purpose-designed for applications where pump space is limited and high torque is required. Typical installations include aerial trucks, fire and rescue vehicles, refuse trucks, truck cranes, and snow and ice equipment. The unit mounts like a standard side-mounted PTO but adds a rear transmission bracket for additional support. Because it is a single, integrated unit rather than a PTO paired with a separate extension, the one-piece shaft removes the input splines that standard extension setups introduce. The clutch sits at the rear of the housing, allowing the gear section to sit as close as possible to the transmission. Wet Spline Technology at the output interface keeps lubrication present at the pump-shaft connection, reducing wear in continuous-duty cycles.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
