The Chelsea 890LAFJW-D5AB or 890LAFJWD5AB is a hydraulic hot-shift power take-off built for Allison 3000 MD and 4000 HD Series transmissions. It mounts via a 10-bolt pattern and delivers an SAE C ("XS") output flange, with continuous-duty torque up to 670 lb-ft and intermittent torque rated at 501+ lb-ft. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The 890 Series design relocates the pump mounting flange to the rear of the transmission, tucking the housing and gear section tightly inboard while moving the output rearward for improved pump clearance. A one-piece main shaft eliminates the input splines between the PTO and output extension. Wet spline lubrication is built in to reduce wear on the PTO and pump shaft in demanding service. Typical applications include aerial trucks, fire and rescue equipment, truck cranes, and refuse vehicles. 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 (XS) output flange and shaft type
Continuous-duty torque up to 670 lb-ft; intermittent torque rated 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet-spline output extends PTO and pump shaft life in high-demand applications
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 (hot-shift)
- Output Shaft Type: SAE C (XS)
- Outlet Flange Type: SAE C
- 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
- Lubrication: Wet Spline
Additional Information
The Chelsea 890 Series mounts like a standard side-mounted PTO but adds a rear support bracket for added stability. It can be ordered for transmissions fitted with or without a cooler, retarder, or both. Common service applications include aerial work platforms, fire and rescue pumpers, refuse trucks, and truck cranes where pump space is limited and high continuous torque is required.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
