The Chelsea 890 Series Power Take-Off, part number 890REFJW-K5XK or 890REFJWK5XK, is a hydraulic PowerShift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. Its 10-bolt mounting with an SAE C output flange and SAE "C" ("XS") extended output shaft relocates the pump mounting flange to the rear of the transmission, creating better pump clearance than a conventional side-mounted PTO. The one-piece main shaft eliminates input splines between the PTO and the output extension, and the clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Wet-spline lubrication extends pump shaft life under demanding duty. Continuous-duty torque rating reaches 670 ft-lb, with intermittent torque exceeding 501 ft-lb. Shaft power output is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue units, refuse trucks, and truck cranes. 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 PowerShift (hot shift) operation
SAE C ("XS") extended output shaft moves pump flange to rear of transmission for improved clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Wet-spline output lubrication extends PTO and pump shaft life
Continuous-duty torque rating up to 670 ft-lb; intermittent torque exceeds 501 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") Extended Output
- Lubrication: Wet Spline
- Continuous Torque Rating: 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.
