Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures including Allison
Ductile iron bearing cap, 117% stronger than gray iron for increased durability
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios covering both low and high speed ranges
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at engagement
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; hose included
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: PowerShift - Hydraulic (hot shift)
- Continuous Operation: Yes
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Speed Ratios: Nine (includes low and high speeds)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube (P) or Wet Spline (W) options
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Series Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM (28 kW / 55 kW)
- 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.
