281GDFJP-G8RY Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off Assembly, part number 281GDFJP-G8RY or 281GDFJPG8RY, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. As an evolution of the 280 Series, the 281 introduces a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap for improved clamp load, and steel clutch discs increased 80% in thickness to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Rotatable cast-iron flanges reduce interference fit issues, and the wet spline lubrication option extends shaft life 7 to 10 times over standard configurations. Call us to confirm proper fit for your application.

Features

Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmissions including Allison
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap reduces vibration effects and improves clamp load
Enhanced clutch pack with steel discs 80% thicker to resist premature tooth wear
Nine speed ratios available, including low and high-speed options
Wet spline lubrication option provides 7 to 10 times greater shaft life; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic (PowerShift / Hot-Shift)
• Compatible Transmissions: Allison automatic (10-bolt aperture)
• Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on Chelsea application pages
• 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

Additional Information

The 281 Series is suited for fire and rescue, truck cranes, pumper cleaner, and refuse applications. SmartStart reduces shock load at start-up for applicable configurations. The positive stop feature for driveline outputs eliminates oil seal damage from coupling. Hose is included with the assembly. Applicable Parker Chelsea reference documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.

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