The Chelsea 890HFFJW-B5XS or 890HFFJWB5XS is a hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. It uses a 10-bolt mounting configuration and features an SAE C ("XS") output flange and shaft. The one-piece main shaft eliminates input splines between the PTO and output extension, and the clutch is located at the rear of the housing so the gear section tucks tightly against the transmission for improved clearance. Wet-spline output technology extends PTO and pump shaft life under demanding duty cycles. Continuous-duty torque is rated up to 670 ft-lb, with intermittent torque exceeding 501 ft-lb. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. Common applications include aerial trucks, fire and rescue apparatus, snow and ice equipment, 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 flange and extended shaft for improved pump clearance
One-piece main shaft eliminates input splines between PTO body and output extension
Wet-spline output extends PTO and pump shaft life in high-demand applications
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
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C ("XS") Extended Output
- Lubricant: Wet Spline
- Continuous Torque: 670 lb-ft (see 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 unit locates the pump output to the rear of the transmission, fitting between the transmission and the frame rail to maximize available pump space. The 890 Series is a single integrated unit, not a PTO with a bolt-on extension. It can be ordered for Allison transmissions equipped with or without a cooler, a retarder, or both. Typical market applications include aerial work trucks, fire and rescue vehicles, refuse trucks, truck cranes, and snow and ice equipment.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
