Description
The Chelsea 281 Series Power Take-Off, part number 281GGFJW-D3RF or 281GGFJWD3RF, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. An evolution of the 280 Series, it introduces 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 steel discs 80% thicker than the previous design. Nine speed ratios span both low and high ranges. Rotatable cast-iron flanges reduce interference with pump installations, and a Wet Spline Lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) protects downstream driven equipment. Common markets include fire and rescue, refuse, truck cranes, and pumper-cleaner applications. Call us to confirm proper fit for your specific transmission and application.
Features
Chelsea 281 Series hydraulic PowerShift (hot-shift) PTO
10-bolt aperture mounting, designed for Allison automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron
Enhanced clutch pack with steel discs 80% thicker than previous design
O-ring sealing configuration between housing and bearing cap for improved clamp load
Nine speed ratios including low and high speeds
Wet Spline Lubrication option for 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment
SmartStart feature reduces shock load at start-up for select applications
Rotatable cast-iron flanges reduce pump clearance interference
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot Shift)
- Transmission Fitment: Allison automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Series Continuous Torque: 390 lb-ft (529 Nm) – verify actual rating on application pages
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine ratios including low and high speeds
- Lubricant: Wet Spline (W) option available
- Electronic Overspeed Control (EOC): Yes
- SmartStart: Yes (select applications)
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
