The Chelsea 890 Series Power Take-Off, part number 890NHFJW-B3CZ or 890NHFJWB3CZ, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers an SAE C ("XS") output shaft with a wet-spline lubricant design that extends pump shaft life under demanding duty cycles. The 890 Series relocates the pump mounting flange to the rear of the transmission, opening clearance between the pump and the frame rail without requiring a separate extension. The one-piece main shaft eliminates the input splines between the PTO body and the output extension, and the clutch sits at the rear of the housing to keep the gear section tight against the transmission. Shaft power output reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM, with a continuous-duty torque rating up to 670 ft-lb. Common applications include aerial trucks, fire and rescue apparatus, truck cranes, and refuse trucks. Call us to confirm proper fit for your application.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot shift) engagement
SAE C ("XS") wet-spline output shaft extends pump and PTO shaft life
One-piece main shaft eliminates input splines between PTO body and output extension
Pump flange relocated to rear of transmission for improved pump clearance
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM; continuous torque up to 670 ft-lb
Tech Specs
- Transmission Application: 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
- Lubricant: Wet Spline
- Continuous Torque: 670 ft-lb (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 64 HP at 500 RPM / 128 HP at 1,000 RPM (48 kW at 500 RPM / 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.
