The Chelsea 890CEFJW-N3CZ is a hydraulic PowerShift Power Take-Off from the Chelsea 890 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 890 Series moves the pump mounting flange to the rear of the transmission, giving the pump more clearance than a conventional side-mount arrangement. Mounting is 10-bolt, the output is SAE C with wet spline technology to extend pump shaft life under demanding duty cycles. The design uses a one-piece main shaft, eliminating input splines between the PTO body and the output extension. The clutch sits at the rear of the housing so the gear section tucks tightly against the transmission. Common applications for the 890 Series include aerial trucks, fire and rescue equipment, refuse trucks, and truck cranes. Sold by Pro Gear and Transmission.
Features
Fits Allison 3000 (MD) and 4000 (HD) Series transmissions
Hydraulic PowerShift (hot shift) engagement
10-bolt mounting configuration
SAE C output flange with wet spline technology for extended PTO and pump shaft life
Rear-mounted pump flange improves clearance between pump and frame rail
One-piece main shaft eliminates input splines between PTO body and output extension
Tech Specs
- Series: Chelsea 890
- Input Gear Designator: FJ - Allison 3000 (MD) and 4000 (HD) Series
- Shift Type: Hydraulic PowerShift
- Mounting Type: 10-Bolt
- Outlet Flange Type: SAE C
- Output Shaft Type: SAE C (XS) with Wet Spline
- Lubricant/Spline: Wet Spline
- Intermittent Torque: 501+ lb-ft
- Output Power: 56+ HP / 51+ kW
Additional Information
The Chelsea 890 Series is designed as a single unit, not a PTO paired with a separate extension, which simplifies installation and reduces potential leak points. It mounts like a standard side-mount PTO but includes an additional rear bracket for support. The 890 Series can be ordered for transmissions equipped with or without a cooler, retarder, or both. Typical markets include aerial, fire and rescue, refuse, defense, and on-highway applications.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
