Features
Hydraulic PowerShift (hot-shift) operation for automatic transmissions with 10-bolt aperture
Ductile iron bearing cap - 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration
Clutch pack steel discs are 80% thicker than the predecessor 280 Series, reducing premature tooth wear
Nine speed ratios including low and high speeds
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
Rotatable cast-iron flanges reduce interference clearance issues; Positive Stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: Hydraulic PowerShift (hot-shift)
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Speed Ratios: Nine ratios, including low and high speeds
- Continuous Torque (series rating): 390 lb-ft (529 Nm)
- Output Power (series): 56+ HP (51+ kW)
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Lubrication: Pressure lube or Wet Spline option
- Continuous Operation: Yes
- Series: Chelsea 281 Series (evolution of the 280 Series)
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
