The Chelsea 281 Series Power Take-Off assembly, part number 281GGFJP-K5RK or 281GGFJPK5RK, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, most commonly Allison and Caterpillar transmissions. The 281 Series is an evolution of the Chelsea 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between housing and bearing cap to improve 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 applications. A Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement. Electronic Overspeed Control (EOC) protects driven equipment. Cross-referenced to 280GGFJP-K5RK or 280GGFJPK5RK. Call us to confirm proper fit for your transmission and application.
Features
Ductile Iron Bearing Cap - 117% stronger than gray iron for increased 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 - 80% thicker steel discs to resist premature tooth wear
Nine Speed Ratios - available in both low- and high-speed configurations
Wet Spline Lubrication Option - extends output shaft life 7 to 10 times compared to standard lubrication
SmartStart and Electronic Overspeed Control (EOC) - reduces engagement shock load and protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic) - Hot Shift
- Transmission Compatibility: Allison and Caterpillar automatic transmissions
- Continuous Operation: Yes
- Single Continuous Duty Torque Rating
- Speed Ratios: Nine (includes low and high speeds)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Wet Spline Lubrication Option: Yes
- Rotatable Cast Iron Flanges for improved pump clearance
- Cross Reference: 280GGFJP-K5RK or 280GGFJPK5RK
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
