281GKFJW-B3RK Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GKFJW-B3RK or 281GKFJWB3RK, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. It carries a single, continuous duty torque rating and offers nine speed ratios spanning both low and high ranges. The 281 Series is an evolution of the 280 Series, with notable design upgrades: a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap to improve clamp load, and an 80% thicker clutch pack steel disc for reduced premature tooth wear. Rotatable cast-iron flanges reduce interference clearance issues, and a Wet Spline lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) protects driven equipment, and SmartStart reduces shock load at start-up on applicable setups. Call us to confirm proper fit for your transmission and application.

Features

Hydraulic PowerShift (hot-shift) operation for use with automatic transmissions
10-bolt mounting aperture compatible with Allison transmission applications
Ductile iron bearing cap, 117% stronger than gray iron
O-ring seal between housing and bearing cap improves clamp load and resists vibration
80% thicker steel discs in the clutch pack reduce 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
SmartStart reduces shock load at start-up for applicable configurations
Rotatable cast-iron flanges reduce pump clearance interference

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic)
• Compatible Transmission Manufacturer: Allison
• Speed Ratios: Nine, including low and high speeds
• Continuous Operation: Yes
• Wet Spline Lubrication Option: Yes (provides 7 to 10 times greater shaft life)
• Electronic Overspeed Control (EOC): Included
• SmartStart: Available for applicable applications
• Bearing Cap Material: Ductile Iron (117% stronger than gray iron)
• Clutch Pack Steel Disc Thickness: 80% thicker than previous 280 Series design

Additional Information

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.