The Chelsea 890LFFJW-D5AF or 890LFFJWD5AF is a hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 10-bolt mount positions the SAE C output flange to the rear of the transmission, moving the pump away from the frame rail for improved clearance without relying on a separate extension. The one-piece main shaft eliminates the input splines found between a conventional PTO and output extension. Wet-spline output lubrication extends pump shaft life in continuous-duty work. Continuous-duty torque reaches 670 ft-lb, with intermittent torque rated at 501+ ft-lb. Shaft power is 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Fits Allison 3000 MD and 4000 HD Series transmissions via 10-bolt mounting
Hydraulic PowerShift (hot shift) engagement
SAE C (XS) output shaft and outlet flange
Continuous-duty torque rating up to 670 ft-lb; intermittent torque 501+ ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet-spline output extends PTO and pump shaft life in demanding conditions
One-piece main shaft with rear-mounted clutch for tighter transmission clearance
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)
- Lubricant: 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
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a rear bracket for additional transmission support. The clutch is located at the rear of the unit, allowing the housing and gear section to tuck tightly against the transmission. This design is well-suited for aerial trucks, fire and rescue vehicles, refuse trucks, snow and ice equipment, and truck crane applications where pump space and high continuous torque are both requirements.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
