281GKFJW-B5RF Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GKFJW-B5RF or 281GKFJWB5RF, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. The 281 Series is an evolution of the 280 Series, adding a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load, and an 80% increase in clutch pack steel disc thickness to resist premature tooth wear. Nine speed ratios covering both low and high ranges give this unit broad application flexibility. Rotatable cast-iron flanges reduce interference clearance issues, and a Positive Stop for driveline outputs eliminates oil seal damage from coupling. Call us to confirm proper fit for your specific transmission and application.

Features

Ductile Iron Bearing Cap: 117% stronger than gray iron for improved durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced Clutch Pack: steel discs increased 80% in thickness to resist premature tooth wear
Nine speed ratios including low and high speeds
Rotatable cast-iron flanges reduce pump clearance interference issues
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic Hot-Shift)
• Compatible Transmissions: Allison and Caterpillar automatic transmissions (10-bolt aperture)
• Continuous Torque Rating: 390 lb-ft (529 Nm) - see application pages for actual ratings
• Output Power: 56+ HP (51+ kW)
• Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM
• Speed Ratios: Nine, including low and high
• Lubrication: Wet Spline option available
• Hose: Included

Additional Information

Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices