The Chelsea 890LFFJW-K5AF is a hydraulic hot shift Power Take-Off built specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mounting pattern and delivers an SAE C ("XS") output with a continuous-duty torque rating of 670 ft-lb and intermittent torque exceeding 501 ft-lb. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The one-piece main shaft eliminates input splines between the PTO and output extension, and Wet Spline technology on the output protects both the PTO and pump shaft under demanding duty cycles. The clutch is positioned at the rear of the housing, which tucks the gear section tightly against the transmission and moves the pump output flange rearward for added clearance between the pump and the frame rail. Common applications include aerial trucks, fire and rescue trucks, snow and ice equipment, 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") output shaft with Wet Spline technology for extended PTO and pump shaft life
Continuous-duty torque rating of 670 ft-lb; intermittent torque exceeds 501 ft-lb
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft with extended reach positions pump flange to rear of transmission for improved pump clearance
Tech Specs
- Transmission Application: Allison 3000 MD and 4000 HD Series
- Product Series: 890
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Output Shaft Type: SAE C ("XS") Output
- Outlet Flange Type: SAE C
- 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 is a single-unit PTO, not a PTO paired with a separate extension. The clutch is located at the rear of the PTO housing, allowing the gear section to sit close to the transmission while pushing the pump mounting flange rearward for clearance between the pump and the frame rail. The unit mounts like a standard side-mounted PTO but includes an additional support bracket at the rear of the transmission. It can be ordered for transmissions equipped with or without a cooler, a retarder, or both. Also referenced as 890LFFJWK5AF.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
