The Chelsea 890 Series Power Take-Off Assembly, part number 890HCFJW-B5XY or 890HCFJWB5XY, is a hydraulic hot shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts with a 10-bolt pattern and positions the SAE C output flange to the rear of the transmission, moving the pump mounting point rearward for improved clearance between the pump and the frame rail. The one-piece main shaft eliminates input splines between the PTO body and the output extension, and the clutch is located at the rear of the housing so the gear section sits tight against the transmission. Continuous-duty torque reaches 670 ft-lb, with intermittent capacity above 501 ft-lb. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. The wet-spline output lubricates the pump shaft interface to extend service life under demanding duty cycles. Common applications include aerial trucks, fire and rescue apparatus, truck cranes, and refuse trucks. Call us to confirm proper fit for your specific transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic hot shift (PowerShift) engagement for on-the-go operation
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 above 501 ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Rear-positioned pump flange and one-piece main shaft improve clearance and eliminate inter-unit input splines
Tech Specs
- Transmission Fitment: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) - 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
