Description
The Chelsea 281 Series Power Take-Off, part number 281GDFJP-K5RB or 281GDFJPK5RB, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. As an evolution of the 280 Series, the 281 Series introduces 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 clutch pack steel discs 80% thicker to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. Common markets include fire and rescue, refuse, truck cranes, and pumper-cleaner applications. Call us to confirm proper fit for your transmission and application.
Features
Ductile Iron Bearing Cap – 117% stronger than gray iron predecessor
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures, including Allison
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced Clutch Pack – steel discs are 80% thicker to resist premature tooth wear
Nine speed ratios available, including low and high-speed ranges
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart feature reduces shock load at start-up for supported applications
Electronic Overspeed Control (EOC) protects driven equipment
Positive Stop for driveline outputs eliminates oil seal damage from coupling
Rotatable cast-iron flanges reduce interference clearance issues
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift / hot-shift)
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Continuous Operation: Yes
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine (including low and high)
- Lubricant Options: Pressure Lube, Wet Spline
- Series: Chelsea 281 Series
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
