The Chelsea 281 Series Power Take-Off, part number 281GBFJP-E5RF or 281GBFJPE5RF, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. Built as an evolution of the proven 280 Series, the 281 Series adds 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 enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low- and high-speed demands. Rotatable cast-iron flanges reduce interference fit issues, and a Wet Spline Lubrication option extends shaft service life by 7 to 10 times over standard configurations. Call us to confirm proper fit for your transmission and application.
The Chelsea 281 Series is suited for demanding markets including Fire and Rescue, Truck Cranes, Pumper Cleaner, and Refuse applications. Rotatable cast-iron flanges help clear pump mounting obstructions, and the Positive Stop feature for driveline outputs eliminates oil seal damage caused by coupling contact. The SmartStart shaft option reduces shock load at engagement on applicable configurations. Electronic Overspeed Control (EOC) is available to protect driven equipment. Related Parker Chelsea documentation includes the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Features
Ductile Iron Bearing Cap - 117% stronger than gray iron for improved durability over the predecessor 280 Series
O-Ring Sealing Configuration - reduces vibrational effects between housing and bearing cap and improves clamp load
Enhanced Clutch Pack - steel discs are 80% thicker to resist premature tooth wear
Nine Speed Ratios - covers both low-speed and high-speed output demands
Wet Spline Lubrication Option - provides 7 to 10 times greater shaft life
SmartStart and Electronic Overspeed Control (EOC) - SmartStart reduces shock load at engagement; EOC protects driven equipment from overspeed damage
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Continuous Operation: Yes
- Speed Ratios: Nine (including low and high speeds)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication Options: Pressure Lube (P), Wet Spline (W)
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Series Intermittent Torque Range: 301-400 lb-ft
- Series Output Power: 51+ kW / 56+ HP
Additional Information
The Chelsea 281 Series is suited for demanding markets including Fire and Rescue, Truck Cranes, Pumper Cleaner, and Refuse applications. Rotatable cast-iron flanges help clear pump mounting obstructions, and the Positive Stop feature for driveline outputs eliminates oil seal damage caused by coupling contact. The SmartStart shaft option reduces shock load at engagement on applicable configurations. Electronic Overspeed Control (EOC) is available to protect driven equipment. Related Parker Chelsea documentation includes the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
