The Chelsea 890REFJW-B5ZS 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 FJ input gear designator confirms that fitment. The design relocates the pump mounting flange to the rear of the transmission, improving pump clearance without the need for a separate extension, the main shaft is a single one-piece unit. Output is SAE C with Wet Spline Technology, extending PTO and pump shaft life under demanding duty cycles. The clutch sits at the rear of the PTO housing, allowing the gear section to tuck tightly against the transmission for a compact installation. Common applications for the 890 Series include aerial trucks, fire and rescue apparatus, refuse trucks, and truck cranes. Available at Pro Gear and Transmission.
Features
10-bolt mounting configuration for Allison 3000 MD and 4000 HD Series transmissions
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
Pump flange relocated to rear of transmission for improved clearance
Suited for aerial, fire and rescue, refuse, and truck crane applications
Tech Specs
- Series: Chelsea 890
- Input Gear Designator: FJ (Allison 3000 MD and 4000 HD Series)
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift
- Output Shaft Type: SAE C with Wet Spline (XS)
- Outlet Flange Type: SAE C
- Lubricant Type: Wet Spline
- Intermittent Torque (Series): 501+ lb-ft
- Output Power (Series): 56+ HP / 51+ kW
Additional Information
Parts Manual: Chelsea 890 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
