The Chelsea 281 Series Power Take-Off, part number 281GGFJP-B8RK or 281GGFJPB8RK, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. Built as an evolution of the 280 Series, the 281 Series introduces a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap for improved clamp load, 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 a positive stop for driveline outputs eliminates oil seal damage from coupling. The Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at start-up, while Electronic Overspeed Control (EOC) protects driven equipment. Call us to confirm proper fit for your application.
Interchanges:
- 280GGFJP
- B8RK
Features
Hydraulic PowerShift (hot-shift) operation for automatic transmissions with a 10-bolt aperture, including Allison applications
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios including low and high speeds; continuous duty torque rating up to 390 lb-ft (series rating)
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Shift Type: Hydraulic PowerShift (hot-shift)
- Mounting Type: 10-Bolt
- Transmission Application: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque: 390 lb-ft / 529 Nm (series rating; verify actual rating on application page)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine, including low and high
- Lubrication: Pressure Lube or Wet Spline options
Additional Information
Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices
