Description
The Chelsea 281 Series Power Take-Off, part number 281GTFJP-H5AC or 281GTFJPH5AC, is a hydraulically shifted (PowerShift) hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series is an evolution of the 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap for improved clamp load, and an 80% increase in clutch pack steel disc thickness 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. A Wet Spline Lubrication option extends shaft life by 7 to 10 times. Common markets include fire and rescue, refuse, pumper cleaner, and truck crane applications. Call us to confirm proper fit for your specific transmission and application.
Features
Hydraulic PowerShift (hot-shift) operation designed for 10-bolt automatic transmissions including Allison
Ductile iron bearing cap – 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios including low and high speed ranges
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up for compatible applications
Electronic Overspeed Control (EOC) protects driven equipment
Rotatable cast-iron flanges reduce interference and improve pump clearance
Positive stop for driveline outputs eliminates oil seal damage from coupling
Tech Specs
- Shift Type: Hydraulic PowerShift (hot-shift)
- Mounting: 10-bolt aperture
- Compatible Transmissions: Allison and Caterpillar automatic transmissions
- Speed Ratios: Nine, including low and high
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Lubrication Options: Pressure lube (P), Wet spline (W)
- 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.
