281GGFJW-B8RF Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GGFJW-B8RF or 281GGFJWB8RF, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar units. This series delivers a single continuous-duty torque rating of 390 lb-ft (529 Nm) and offers nine speed ratios spanning both low and high ranges. An evolved design over the 280 Series, the 281 introduces a ductile iron bearing cap rated 117% stronger than gray iron and an 80% thicker clutch pack steel disc for extended service life. Rotatable cast-iron flanges reduce pump clearance interference, and a positive stop on driveline outputs prevents oil seal damage. Electronic Overspeed Control (EOC) is included to protect driven equipment. Call us to confirm proper fit for your application.

Features

Hydraulic (PowerShift) hot-shift operation for use on 10-bolt automatic transmission apertures, including Allison
Ductile iron bearing cap rated 117% stronger than gray iron for increased durability
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series design
Nine speed ratios available, covering both low and high speed ranges
Wet Spline Lubrication option extends shaft service life 7 to 10 times compared to standard lubrication
Electronic Overspeed Control (EOC) and SmartStart feature to reduce shock load at start-up

Tech Specs

• Mounting Type: 10-Bolt aperture (Allison and Caterpillar automatic transmissions)
• Shift Type: PowerShift (Hydraulic hot-shift)
• Continuous Torque: 390 lb-ft (529 Nm)
• Speed Ratios: Nine ratios, including low and high speeds
• Continuous Operation: Yes
• Lubrication: Pressure Lube or Wet Spline option
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Electronic Overspeed Control (EOC): Included

Additional Information

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