The Chelsea 890HDFJW-D5XS or 890HDFJWD5XS is a hydraulic hot-shift power take-off from the Chelsea 890 Series, 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 torque rating up to 670 lb-ft and intermittent torque above 501 lb-ft. 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 the output extension, and wet-spline technology on the output protects both the PTO and pump shaft in demanding duty cycles. The design locates the pump output to the rear of the transmission, improving clearance in tight frame-rail installations. Common applications include aerial trucks, fire and rescue, refuse trucks, and truck cranes. Call us to confirm proper fit for your specific chassis and transmission configuration.
Features
10-bolt mount fits Allison 3000 MD and 4000 HD Series transmissions
Hydraulic PowerShift (hot-shift) engagement
SAE C ("XS") output with wet-spline technology for extended pump shaft life
Continuous torque rating up to 670 lb-ft; intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
One-piece main shaft eliminates inter-stage input splines for improved durability
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/Output: 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 support bracket at the rear of the transmission. The clutch is positioned at the rear of the PTO housing, allowing the gear section to sit tightly against the transmission for improved pump clearance. The unit can be ordered for transmissions equipped with or without a cooler, a retarder, or both. Typical markets include aerial, fire and rescue, refuse, on-highway, and defense applications.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
