The Chelsea 890 Series Power Take-Off, part number 890JAFJW-B3CS or 890JAFJWB3CS, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt flange and delivers an SAE C ("XS") output with shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM. Continuous-duty torque rating reaches 670 ft-lb, with intermittent torque capacity exceeding 501 ft-lb. The 890 Series design relocates the PTO/pump mounting flange to the rear of the transmission, gaining clearance between the pump and the frame rail. A one-piece main shaft eliminates the input splines between PTO and output extension. Wet-spline lubrication is built in, extending pump shaft life in demanding duty cycles. Typical applications include aerial trucks, fire and rescue apparatus, truck cranes, and refuse vehicles. Call us to confirm proper fit for your transmission configuration.
Features
10-bolt mounting for Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot shift) engagement
SAE C ("XS") output shaft with wet-spline lubrication to extend pump 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
Rear-mounted clutch and extended shaft move pump output behind the transmission for improved clearance
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") Wet Spline
- Lubricant: Wet Spline
- 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
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
