281GDFJW-D3RK Chelsea PTO Assembly

The Chelsea 281GDFJW-D3RK or 281GDFJWD3RK is a 281 Series hydraulically shifted hot-shift power take-off designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. This series is rated for continuous operation and offers nine speed ratios covering both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the clutch pack uses steel discs 80% thicker than the predecessor 280 Series design. Rotatable cast-iron flanges reduce interference issues at pump clearance. A wet spline lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) and SmartStart protect driven equipment and reduce shock load at engagement. Call us to confirm proper fit for your application.

Features

Ductile Iron Bearing Cap - 117% stronger than gray iron versus the predecessor 280 Series
Enhanced Clutch Pack - steel discs 80% thicker to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Nine speed ratios including low and high speeds for flexible output matching
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) and SmartStart to protect driven equipment and reduce engagement shock
Rotatable cast-iron flanges reduce pump clearance interference; Positive Stop eliminates oil seal damage on driveline outputs

Tech Specs

• Mounting Type: 10-Bolt aperture (Allison and Caterpillar automatic transmissions)
• Shift Type: PowerShift - Hydraulic hot-shift
• Continuous Operation: Yes
• Speed Ratios: Nine, including low and high speeds
• Series Continuous Torque: 390 lb-ft (529 Nm) - check application pages for actual torque rating
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Lubricant Options: Pressure Lube (P) or Wet Spline (W)
• Output Power: 56+ HP (51+ kW)
• Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse

Additional Information

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