The Chelsea 281GMFJP-D5XD or 281GMFJPD5XD is a 281 Series hydraulic PowerShift (hot-shift) power take-off built for automatic transmissions with a 10-bolt aperture, commonly matched to Allison transmissions. As an evolution of the 280 Series, the 281 incorporates 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 steel clutch discs that are 80% thicker than the previous design to resist premature tooth wear. Nine speed ratios cover both low- and high-speed applications. Rotatable cast-iron flanges reduce interference fit issues, and the wet spline lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) and the SmartStart feature are included to protect driven equipment and reduce start-up shock loads. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile iron bearing cap - 117% stronger than gray iron bearing caps
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series design
Nine speed ratios available, spanning low- and high-speed ranges
Wet spline lubrication option provides 7 to 10 times greater output shaft life
Electronic Overspeed Control (EOC) and SmartStart protect driven equipment and reduce start-up shock load
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Operation: Yes
- Transmission Application: Allison automatic transmissions (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Speed Ratios: Nine ratios including low- and high-speed
- Lubrication: Pressure lube or wet spline option
- Electronic Overspeed Control (EOC): Included
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
