Description
The Chelsea 281GBFJR-B5RK or 281GBFJRB5RK is a 281 Series Power Take-Off Assembly built for automatic transmissions with a 10-bolt aperture, including Allison applications. This hydraulically shifted, hot-shift PTO supports continuous operation and delivers nine speed ratios spanning both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the clutch pack uses steel discs 80% thicker than the previous-generation design to resist premature tooth wear. Rotatable cast-iron flanges reduce interference clearance issues, and the wet spline lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) protects driven equipment, and SmartStart reduces shock load at engagement. A hose is included. Call us to confirm proper fit for your application.
Features
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series design
Nine speed ratios including low and high speeds
Wet spline lubrication option extends shaft life 7 to 10 times compared to standard
Electronic Overspeed Control (EOC) and SmartStart engagement protection included
Hose included with assembly
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic), hot-shift
- Continuous Operation: Yes
- Speed Ratios: Nine, including low and high
- Transmission Application: Allison automatic transmissions (10-bolt aperture)
- Lubricant: Wet Spline option available
- Series Continuous Torque: 390 lb-ft (529 Nm) – see application pages for actual torque rating
- Series Intermittent Torque: 301 to 400 lb-ft range
- Series Output Power: 56+ HP (51+ kW)
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
