The Chelsea 281 Series Power Take-Off Assembly 281GPFJW-B8RK or 281GPFJWB8RK is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series is an evolution of the 280 Series, incorporating 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 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high ranges. Continuous operation is supported, and the Wet Spline Lubrication option delivers 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) and the SmartStart feature protect driven equipment and reduce shock load at engagement. Call us to confirm proper fit for your transmission application.
Features
10-Bolt mounting aperture for Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot-shift) operation supports continuous-duty use
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and reduces vibration effects
80% thicker clutch pack steel discs resist premature tooth wear
Nine speed ratios including low and high speeds; Wet Spline Lubrication option extends shaft life 7 to 10 times
SmartStart reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting: 10-Bolt aperture
- Shift Type: Hydraulic PowerShift (hot-shift)
- Continuous Operation: Yes
- Compatible Transmissions: Allison automatic (10-bolt aperture)
- Speed Ratios: Nine, including low and high speeds
- Lubrication Option: Wet Spline (W) for extended shaft life
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Electronic Overspeed Control (EOC): Included
Additional Information
Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices
