The Chelsea 281GPFJP-G8RK or 281GPFJPG8RK is a 281 Series Power Take-Off designed for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. It uses hydraulic (PowerShift) engagement for hot-shift operation, making it suited for continuous-duty cycles in refuse, fire and rescue, pumper cleaner, and truck crane applications. Nine speed ratios cover both low- and high-speed output demands. A ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between housing and bearing cap, and an 80% thicker clutch-pack steel disc design all address vibrational stress from modern engine profiles. Rotatable cast-iron flanges reduce interference fitment issues, and a positive stop on driveline outputs protects oil seals from coupling damage. Call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot-shift) engagement for continuous-duty operation
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap improves clamp load and resists vibration
80% thicker steel discs in clutch pack resist premature tooth wear
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces shock load at start-up for compatible applications
Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic (PowerShift) Hot-Shift
- Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
- Continuous Operation: Yes
- Speed Ratios: 9 (includes low and high speeds)
- Series Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication Options: Pressure Lube, Wet Spline
- Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
