The Chelsea 890 Series Power Take-Off, part number 890UAFJW-K5XS or 890UAFJWK5XS, is a hydraulic hot shift PTO engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series mounts via a 10-bolt pattern and positions the pump output flange to the rear of the transmission, tucking the housing tightly against the transmission while the extended one-piece main shaft moves the SAE C output further rearward for improved pump clearance. Wet-spline output technology reduces wear on both the PTO and pump shaft in demanding duty cycles. Continuous-duty torque capacity is up to 670 ft-lb, with shaft power reaching 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue apparatus, refuse vehicles, 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) engagement
SAE C output flange and SAE C (XS) extended output shaft for improved pump clearance
One-piece main shaft eliminates intermediate input splines between PTO body and output extension
Wet-spline output for extended PTO and pump shaft service life
Continuous-duty torque up to 670 ft-lb; shaft power 64 HP at 500 RPM, 128 HP at 1,000 RPM
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C Extended (XS) Output
- Lubricant / Spline: Wet Spline
- Continuous Torque: up to 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
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
