The Chelsea 281GSFJW-B5RF or 281GSFJWB5RF is a 281 Series hydraulically shifted hot-shift Power Take-Off designed for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. The 281 Series is an evolution of the 280 Series, featuring a ductile iron bearing cap rated 117% stronger than gray iron and an upgraded clutch pack with 80% thicker steel discs to resist premature tooth wear. An O-ring sealing configuration between the housing and bearing cap improves clamp load and reduces the damaging vibrational effects of modern engine designs. Nine speed ratios cover both low and high-speed applications. The rotatable cast-iron flanges reduce interference issues at pump mounting. This unit also cross-references to 280GSFJW-B5RF or 280GSFJWB5RF. Call us to confirm proper fit for your application.
Features
281 Series hydraulic PowerShift (hot-shift) PTO, 10-bolt aperture mount for Allison automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Rotatable cast-iron flanges reduce pump-clearance interference
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Nine speed ratios including low and high speeds; hose included
Cross-references: 280GSFJW-B5RF or 280GSFJWB5RF
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: Hydraulic PowerShift (hot-shift)
- Compatible Transmissions: Allison automatic transmissions
- Continuous Operation: Yes
- Series Continuous Torque Rating: 390 lb-ft (529 Nm) - check application pages for actual torque ratings
- Series Intermittent Torque Rating: 301 to 400 lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM (28 kW at 500 RPM / 55 kW at 1000 RPM)
- Speed Ratios: Nine, including low and high speeds
- Lubrication: Wet Spline option available
- Cross Reference: 280GSFJW-B5RF or 280GSFJWB5RF
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
