The Chelsea 281 Series Power Take-Off, part number 281GDFFJP-B5RF or 281GDFFJPB5RF, is a hydraulically shifted (PowerShift) hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. The 281 Series is an evolution of the 280 Series, adding a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration for improved clamp load, and a clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low and high ranges, and the Wet Spline Lubrication option extends shaft life by 7 to 10 times. Typical markets include fire and rescue, truck cranes, pumper cleaners, and refuse trucks. Call us to confirm proper fit for your application.
Features
Ductile iron bearing cap, 117% stronger than gray iron, for increased durability
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration
Clutch pack steel discs are 80% thicker than the predecessor 280 Series to resist premature tooth wear
Nine speed ratios available, including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) and SmartStart reduce start-up shock load and protect driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) - Hot Shift
- Compatible Transmission Manufacturers: Allison, Caterpillar (10-bolt aperture)
- Continuous Torque (Series Rating): 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Types Available (Series): SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Shaft Power (Series): 37 HP at 500 RPM, 74 HP at 1000 RPM
- Lubrication Options: Pressure Lube, Wet Spline
- Speed Ratios: Nine, including low and high
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
