Features
Ductile Iron Bearing Cap - 117% stronger than gray iron for increased durability
Improved Seal - O-ring configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced Clutch Pack - Steel discs are 80% thicker to resist premature tooth wear
Nine Speed Ratios - Includes both low- and high-speed options
Wet Spline Lubrication Option - Extends shaft life by 7 to 10 times versus standard configuration
Electronic Overspeed Control (EOC) - Protects driven equipment from overspeed damage
SmartStart - Reduces shock load at startup for compatible applications
Positive Stop for Driveline Outputs - Eliminates oil seal damage from coupling
10-Bolt Mounting - Fits automatic transmissions with a 10-bolt aperture, including Allison
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Continuous Operation: Yes
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Series Continuous Torque: 390 lb-ft (529 Nm) - see application pages for actual rating
- Output Options: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube or Wet Spline options
- Speed Ratios: Nine ratios available, including low and high speeds
- Cross Reference: 280GGFJP-K8RF or 280GGFJPK8RF
Additional Information
The Chelsea 281 Series is suited for demanding markets including fire and rescue, refuse, truck cranes, and pumper-cleaner applications. The hose ships included with the assembly - no need to order separately. The SmartStart feature is available for select applications to reduce drivetrain shock at engagement. Electronic Overspeed Control (EOC) is available to protect downstream driven equipment. For full parts and service information, refer to Parker document HY25-2281-M1/US (281/288 Series Parts List) and the 267/281/288/871/878 Series Owner's Manual.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
