Features
Hydraulic PowerShift (hot-shift) operation for use with Allison and Caterpillar automatic transmissions
10-bolt aperture mounting
Nine speed ratios including low and high speeds
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing between housing and bearing cap improves clamp load and resists vibration
80% thicker steel clutch pack discs for reduced premature tooth wear
Wet Spline lubrication option provides 7 to 10 times greater shaft life
Positive Stop on driveline outputs eliminates oil seal damage from coupling
SmartStart reduces shock load at start-up for compatible applications
Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: Hydraulic PowerShift (hot-shift)
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Series Continuous Torque Rating: 390 lb-ft (529 Nm)
- Speed Ratios: Nine, including low and high
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Shaft Power (series): 37 HP at 500 RPM, 74 HP at 1000 RPM
- Lubricant Options: Pressure lube, Wet Spline
- Continuous Operation: Yes
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
