The Chelsea 890MCFJW-B5AF is a 10-bolt hydraulic PowerShift power take-off from the Chelsea 890 Series, engineered specifically for Allison 3000 MD and 4000 HD Series transmissions. The 890 Series moves the PTO pump mounting flange to the rear of the transmission, providing improved pump clearance compared to conventional side-mount designs. The output uses an SAE C flange with wet spline technology to extend pump shaft life in demanding duty cycles. The main shaft is a single one-piece design, eliminating input splines between the PTO body and the output extension. Common applications for this series include aerial trucks, fire and rescue trucks, refuse trucks, snow and ice equipment, and truck cranes. Part number 890MCFJW-B5AF is sold by Pro Gear and Transmission.
Features
Designed for Allison 3000 MD and 4000 HD Series transmissions
10-bolt mounting configuration
Hydraulic PowerShift (hot shift) operation
SAE C output flange with wet spline technology for extended pump shaft life
One-piece main shaft eliminates input splines between PTO body and output extension
Series intermittent torque rating: 501+ lb-ft; output power: 56+ HP
Tech Specs
- Product Series: Chelsea 890
- Part Number: 890MCFJW-B5AF
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Input Gear Designator: FJ - Allison 3000 MD and 4000 HD Series
- Output Shaft Type: SAE C with Wet Spline
- Outlet Flange Type: SAE C
- Series Intermittent Torque: 501+ lb-ft / 501+ Nm
- Series Output Power: 56+ HP / 51+ kW
Additional Information
The Chelsea 890 Series mounts like a standard side-mount 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 tuck tightly against the transmission for improved frame-rail clearance. The 890 Series is a single integrated unit rather than a PTO paired with a separate output extension. It can be ordered for transmissions equipped with or without a cooler, retarder, or both. Typical application markets include aerial, fire and rescue, refuse, snow and ice, defense, and on-highway vocational trucks.Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
