Features
Hydraulic PowerShift (hot-shift) operation for use with 10-bolt automatic transmissions, including Allison
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Enhanced clutch pack with steel discs 80% thicker to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Nine speed ratios including low and high speeds
Electronic Overspeed Control (EOC) protects driven equipment from overspeed damage
Wet spline lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up for compatible applications
Positive stop for driveline outputs eliminates oil seal damage from coupling
Rotatable cast iron flanges reduce pump clearance interference issues
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / Hot-Shift)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque: 390 lb-ft (529 Nm) - see application pages for actual rating
- Intermittent Torque: 301-400 lb-ft range
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1,000 RPM
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Output Shaft Options: SmartStart round shaft (1-1/4 in., 5/16 in. key), 3/4 in. - 11T pump spline, SAE B (7/8 in. - 13T) pump spline, SAE C (1-1/4 in. - 14T) pump spline, 1410 companion flange
- Lubrication: Pressure lube or wet spline option
- Continuous Operation: Yes
- Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
