281GKFJP-B5RS Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GKFJP-B5RS or 281GKFJPB5RS, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison applications. It carries a single continuous-duty torque rating and offers nine speed ratios spanning low and high speeds. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing vibrational effects. The clutch pack uses 80% thicker steel disks to resist premature tooth wear. Rotatable cast-iron flanges reduce interference issues, and the Positive Stop feature on driveline outputs eliminates oil seal damage from coupling. Call us to confirm proper fit for your specific transmission and application.

Features

Hydraulic PowerShift (hot-shift) operation for use with Allison automatic transmissions
10-bolt aperture mounting configuration
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap reduces vibrational effects and improves clamp load
80% thicker steel disks in the clutch pack to resist premature tooth wear
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Positive Stop on driveline outputs eliminates oil seal damage from coupling
SmartStart feature reduces shock load at start-up for compatible applications
Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic PowerShift (Hot-Shift)
• Continuous Operation: Yes
• Transmission Compatibility: Allison automatic transmissions
• Continuous Torque Rating: 390 lb-ft (529 Nm) - see application pages for actual ratings
• Speed Ratios: Nine, including low and high speeds
• Lubrication Options: Pressure Lube (P) or Wet Spline (W)
• Series: Chelsea 281 Series (evolution of the 280 Series)

Additional Information

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.