Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission mounting
Ductile iron bearing cap, 117% stronger than gray iron, for increased durability
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Enhanced clutch pack with 80% thicker steel disks to resist premature tooth wear
Nine speed ratios, including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment
SmartStart reduces shock load at start-up
Rotatable cast iron flanges reduce pump clearance interference
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - check application pages for actual torque rating
- Series Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
- Series Output Power: 56+ HP (51+ kW)
- Series Shaft Power: 37 HP at 500 RPM; 74 HP at 1000 RPM
- Speed Ratios: Nine (including low and high)
- Transmission Compatibility: Allison and Caterpillar (10-bolt aperture)
- Lubrication: Wet Spline option available
- Hose: Included
Additional Information
The Chelsea 281 Series is designed for fire and rescue, truck crane, pumper cleaner, and refuse truck applications. Relevant reference documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual, both published by Parker Chelsea.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
