The Chelsea 281GDFJP-B5UN or 281GDFJPB5UN is a 281 Series Power Take-Off built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. This hydraulically shifted, hot-shift PTO uses a ductile iron bearing cap rated 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibrational effects from modern engine designs. The clutch pack features steel discs 80% thicker than the prior 280 Series to resist premature tooth wear. Nine speed ratios cover both low and high speed needs. Rotatable cast-iron flanges reduce interference at the pump, and a positive stop on driveline outputs prevents oil seal damage. The Wet Spline Lubrication option extends shaft life 7 to 10 times. Electronic Overspeed Control (EOC) protects driven equipment, and the SmartStart option reduces shock load at engagement. Common markets include fire and rescue, refuse, truck cranes, and pumper-cleaner units. Call us to confirm proper fitment for your transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron for improved durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Clutch pack steel discs 80% thicker than the predecessor 280 Series to resist tooth wear
Nine speed ratios available, including low and high speed configurations
Rotatable cast-iron flanges reduce pump clearance interference; positive stop on driveline outputs prevents oil seal damage
Electronic Overspeed Control (EOC) and optional SmartStart reduce shock load and protect driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Compatible Transmissions: Allison and Caterpillar automatics
- Continuous Duty: Yes
- Series: Chelsea 281 Series (evolution of 280 Series)
- Wet Spline Lubrication: Optional - provides 7 to 10 times greater shaft life
- Electronic Overspeed Control (EOC): Included
- SmartStart: Available for applicable configurations
- Available Speed Ratios: Nine, including low and high speeds
Additional Information
Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices
