Features
10-Bolt mounting aperture, compatible with Allison automatic transmissions
Hydraulic PowerShift (hot shift) engagement for continuous-duty operation
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal configuration between housing and bearing cap to reduce vibrational effects and improve clamp load
80% thicker steel discs in the clutch pack 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
SmartStart feature reduces shock load at start-up for select applications
Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast iron flanges reduce pump clearance interference
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison automatic transmissions
- Continuous Operation: Yes
- Series Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1,000 RPM
- Speed Ratios: Nine (includes low and high speeds)
- Lubricant: Pressure Lube and Wet Spline options available
Additional Information
The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaner, and refuse applications. The 281 Series parts list is documented under Parker publication HY25-2281-M1/US. The owner's manual covers the 267, 281, 288, 871, and 878 Series. Call us to confirm this part number fits your specific transmission and application configuration.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
