Features
Ductile Iron Bearing Cap - 117% stronger than gray iron compared to the predecessor 280 Series
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Clutch pack steel discs are 80% thicker to resist premature tooth wear
Nine speed ratios available, including low- and high-speed options
Rotatable cast-iron flanges improve pump clearance and reduce interference issues
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up for applicable configurations
Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Operation: Yes
- Compatible Transmission Manufacturers: Allison, Caterpillar
- Speed Ratios: Nine (includes low and high speeds)
- Series Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Series Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM (28 kW at 500 RPM / 55 kW at 1000 RPM)
- Lubrication: Pressure Lube or Wet Spline options
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Part Number: 281GTFJS-D3AC or 281GTFJSD3AC
- NMFC Code: 125820 - Hydraulic PTOs, Pumps, Motors
Additional Information
Reference Documents: 281/288 Series Parts List (HY25-2281-M1/US); 267/281/288/871/878 Series Owner's Manual; Chelsea PTO Stud Kits (HY25-2002-M1_US)
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
