The Chelsea 281 Series Power Take-Off, part number 281GPFJP-B3RF or 281GPFJPB3RF, is a hydraulically shifted (PowerShift) hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison applications. It carries a single, continuous duty torque rating and supports nine speed ratios spanning low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing the vibrational effects of modern engine designs. The clutch pack features steel discs that are 80% thicker than the predecessor 280 Series, extending service life. Rotatable cast-iron flanges reduce interference issues, and a Positive Stop for driveline outputs eliminates oil seal damage from coupling. Wet Spline Lubrication option delivers 7 to 10 times greater shaft life. SmartStart reduces shock load at start-up, and Electronic Overspeed Control (EOC) protects driven equipment. Call us to confirm proper fit for your transmission and application.
Features
Chelsea 281 Series evolution of the top-selling 280 Series PTO
10-bolt mounting aperture for Allison and compatible automatic transmissions
Hydraulic PowerShift (hot-shift) operation for continuous duty
Ductile iron bearing cap, 117% stronger than gray iron, with O-ring housing seal for improved clamp load
Enhanced clutch pack with steel discs 80% thicker than 280 Series predecessor
Nine speed ratios including low and high; Wet Spline Lubrication option for 7-10x greater shaft life
SmartStart shock-load reduction and Electronic Overspeed Control (EOC) for equipment protection
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Operation: Yes
- Transmission Application: Allison automatic transmissions
- Speed Ratios: Nine ratios including low and high
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubricant Options: Pressure Lube (P), Wet Spline (W)
- Series Continuous Torque: 390 lb-ft (529 Nm) -- verify actual rating on application pages
- Bearing Cap Material: Ductile Iron (117% stronger than gray iron)
- Clutch Pack: Steel discs 80% thicker than 280 Series
- 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.
