The Chelsea 281 Series Power Take-Off, part number 281GKFJR-B3XV or 281GKFJRB3XV, 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 o-ring sealing configuration between housing and bearing cap for improved clamp load, and an 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low- and high-speed requirements. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. Typical markets include fire and rescue, refuse, truck cranes, and pumper-cleaner equipment. Call us to confirm proper fitment for your transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap improves clamp load and resists vibration
Enhanced clutch pack with 80% thicker steel discs to reduce premature tooth wear
Nine speed ratios available, including both low- and high-speed options
Wet Spline Lubrication option extends shaft life 7 to 10 times over standard
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at engagement
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- 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
- Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
- Speed Ratios: Nine, including low and high speeds
- Lubrication: Pressure Lube or Wet Spline options
- Continuous Operation: Yes
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
