281GDFJW-B8RK Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off Assembly, part number 281GDFJW-B8RK or 281GDFJWB8RK, is a hydraulically shifted (PowerShift) hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, most commonly Allison and Caterpillar transmissions. The 281 Series advances the proven 280 Series platform with 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 reduce vibrational effects, and an enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low- and high-speed applications. Rotatable cast-iron flanges reduce interference clearance issues, and the wet spline lubrication option delivers 7 to 10 times greater shaft life. Call us to confirm proper fit for your transmission and application.

Features

Ductile iron bearing cap - 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low- and high-speed selections
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) and SmartStart reduce shock load and protect driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic), hot-shift
• Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
• Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
• Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
• Speed Ratios: Nine (includes low and high speeds)
• Lubrication: Pressure lube (P) or wet spline (W) options
• Continuous Operation: Yes
• Markets: Fire and rescue, truck cranes, pumper cleaner, refuse

Additional Information

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