The Chelsea 281 Series Power Take-Off, part number 281GKFJW-G3RY or 281GKFJWG3RY, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series is the direct evolution of the 280 Series, featuring a ductile iron bearing cap rated 117% stronger than gray iron and an 80% thicker clutch pack steel disc package to resist premature tooth wear. An O-ring sealing configuration between the housing and bearing cap reduces vibrational effects from modern engine designs. Nine speed ratios cover both low and high operating ranges. The series continuous torque rating reaches 390 lb-ft, with output options including SAE B and SAE C pump flanges, ISO 7652, and driveline configurations. Call us to confirm proper fit for your transmission and application.
Features
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap reduces vibrational effects and improves clamp load
80% thicker steel discs in the clutch pack resist premature tooth wear
Nine speed ratios including low and high speeds
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment from overspeed damage
SmartStart feature reduces shock load at start-up for compatible applications
Positive stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque: 390 lb-ft
- Output Options: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Speed Ratios: Nine, including low and high
- Lubrication: Pressure lube or wet spline options available
- Continuous Operation: Yes
- Output Power: 56+ HP
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
