Description
The Chelsea 281 Series Power Take-Off, part number 281GTFJP-B3BD or 281GTFJPB3BD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series builds on the proven 280 Series platform with a ductile iron bearing cap rated 117% stronger than gray iron, an 80% thicker steel clutch pack disc to resist premature tooth wear, and an O-ring sealing configuration between the housing and bearing cap for improved clamp load and vibration resistance. Nine speed ratios cover both low- and high-speed output demands. Rotatable cast iron flanges reduce interference clearance issues. Available output types include SAE B and SAE C pump flanges, ISO 7652 flange, and driveline configurations. Call us to confirm proper fit for your transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron, for greater durability in demanding cycles
O-ring sealing configuration between housing and bearing cap reduces vibration effects and improves 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; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Operation: Yes
- Continuous Torque: 390 lb-ft (529 Nm) – verify actual rating on application pages
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine ratios, including low and high speeds
- Lubrication: Pressure lube or Wet Spline options
- 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.
