The Chelsea 281 Series Power Take-Off, part number 281GKFJP-K5RF or 281GKFJPK5RF, is a hydraulically shifted (PowerShift) hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It is an evolution of the 280 Series, featuring a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap, and an enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. The 281 Series delivers a single, continuous duty torque rating and supports multiple output types including SAE B and SAE C pump flanges and driveline outputs. Common markets include fire and rescue, refuse, truck cranes, and pumper-cleaner applications. Call us to confirm proper fit for your application.
Features
Ductile iron bearing cap - 117% stronger than gray iron, evolved from the 280 Series design
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios available, including low and high speeds
Rotatable cast iron flanges reduce interference and improve pump clearance
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart option reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) - Hot Shift
- Compatible Transmission: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm) - see application pages for actual torque ratings
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine ratios including low and high speeds
- Continuous Operation: Yes
- Lubrication: Pressure Lube and Wet Spline options available
- Series: Chelsea 281 Series (evolution of 280 Series)
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
