Features
10-bolt mounting for Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot shift) operation supports continuous-duty use
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Clutch pack steel discs 80% thicker than 280 Series for reduced tooth wear
O-ring sealing between housing and bearing cap improves clamp load and resists vibration
Wet Spline Lubrication option extends shaft life 7 to 10 times; hose included
Nine speed ratios spanning low and high ranges
SmartStart reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast iron flanges reduce pump clearance interference; Positive Stop eliminates oil seal damage on driveline outputs
Tech Specs
- Mounting: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Continuous Operation: Yes
- Series Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine (includes low and high)
- Lubrication: Pressure Lube (P) or Wet Spline (W) option
- Typical Markets: Fire and Rescue, Refuse, Pumper/Cleaner, Truck Cranes
- Part Number: 281GTFJP-B5RY or 281GTFJPB5RY
Additional Information
The 281 Series is an evolution of the Chelsea 280 Series PTO, incorporating structural and sealing upgrades to address the vibrational demands of modern engine designs. Relevant Parker Chelsea documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. Call us to confirm proper fit for your transmission and application.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
