The Chelsea 281 Series Power Take-Off, part number 281GGFJP-G8RY or 281GGFJPG8RY, is a hydraulically shifted, hot-shift PTO designed for 10-bolt automatic transmissions including Allison and Caterpillar units. It carries a single continuous-duty torque rating and offers nine speed ratios spanning low and high ranges. 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 the vibrational effects of modern engine designs. The clutch pack features 80% thicker steel disks to resist premature tooth wear. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flanges, and driveline outputs with a positive stop to prevent oil seal damage. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
The 281 Series is an evolution of Chelsea's top-selling 280 Series PTO, incorporating structural and sealing upgrades focused on the demands of modern engine designs. Markets served include fire and rescue, truck cranes, pumper-cleaner, and refuse applications. Supporting documentation includes the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual, available through Parker Chelsea.
Features
Ductile Iron Bearing Cap - 117% stronger than gray iron for increased durability
O-Ring Seal Configuration - reduces vibrational effects and improves clamp load between housing and bearing cap
Enhanced Clutch Pack - steel disks are 80% thicker to resist premature tooth wear
Nine Speed Ratios - includes both low and high-speed selections
Positive Stop for Driveline Outputs - eliminates oil seal damage from coupling
Wet Spline Lubrication Option - provides 7 to 10 times greater shaft life
SmartStart - reduces shock load at start-up for compatible applications
Electronic Overspeed Control (EOC) - protects driven equipment from overspeed damage
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) - Hot Shift
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Speed Ratios: Nine, including low and high speeds
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication Options: Pressure Lube, Wet Spline
- Continuous Operation: Yes
- Output Power: 56+ HP (51+ kW)
Additional Information
The 281 Series is an evolution of Chelsea's top-selling 280 Series PTO, incorporating structural and sealing upgrades focused on the demands of modern engine designs. Markets served include fire and rescue, truck cranes, pumper-cleaner, and refuse applications. Supporting documentation includes the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual, available through Parker Chelsea.
Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices
