281GPFJP-E5RK Chelsea PTO Assembly

The Chelsea 281GPFJP-E5RK or 281GPFJPE5RK is a 281 Series Power Take-Off built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. It uses hydraulic PowerShift operation and carries a single continuous-duty torque rating of 390 lb-ft (529 Nm). The series supports nine speed ratios spanning low and high ranges, with output options including SAE B and SAE C pump flanges, ISO 7652 flanges, and driveline configurations. The enhanced clutch pack features steel discs that are 80% thicker than the previous 280 Series, and the ductile iron bearing cap is 117% stronger than gray iron. Call us to confirm proper fit for your specific transmission and application.

Features

Ductile iron bearing cap is 117% stronger than gray iron, directly addressing vibration from modern engine designs
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational wear
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series for resistance to premature tooth wear
Nine speed ratios available, covering both low and high speed ranges
Wet Spline Lubrication option extends shaft service life by 7 to 10 times compared to standard lubrication
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart option reduces shock load at engagement

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic PowerShift
• Continuous Torque: 390 lb-ft (529 Nm)
• Compatible Transmissions: Allison and Caterpillar automatic transmissions (10-bolt aperture)
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Speed Ratios: Nine ratios including low and high speeds
• Lubrication: Pressure Lube or Wet Spline options
• Continuous Operation: Yes
• Series: Chelsea 281 Series (evolution of 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.