The Chelsea 890RBFJW-B5XK or 890RBFJWB5XK is a 10-bolt hydraulic PowerShift PTO assembly engineered for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series mounts like a standard side-mount PTO but positions the SAE C output flange to the rear of the transmission, pulling the pump clear of the frame rail without an external extension tube. The main shaft is one piece, eliminating the input splines that shorter-body designs require between the PTO body and an output stub. Continuous-duty torque reaches 670 ft-lb; intermittent torque is rated at 501+ lb-ft. Wet spline lubrication is built in to reduce wear on the pump shaft in hard-working duty cycles. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue, refuse, and truck crane installations where pump clearance and sustained torque matter. Call us to confirm proper fit for your transmission build.
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+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft design moves the pump output to the rear of the transmission for improved clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C (XS) Wet Spline
- Outlet Flange Type: SAE C
- Continuous Torque: 670 lb-ft (check application pages for actual 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
- Lubrication: Wet Spline
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
