The Chelsea 281 Series Power Take-Off, part number 281GBFJP-K5RK or 281GBFJPK5RK, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. Built as an evolution of the 280 Series, it features 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 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low and high-speed applications. The wet spline lubrication option extends shaft life by 7 to 10 times. Common markets include fire and rescue, refuse, truck cranes, and pumper-cleaner equipment. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Enhanced clutch pack with 80% thicker steel discs resists premature tooth wear
Nine speed ratios including low and high-speed options
Wet spline lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at engagement
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic Hot-Shift)
- Continuous Operation: Yes
- Continuous Torque Rating: 390 lb-ft (529 Nm) - check application pages for actual rating
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Transmission Compatibility: Allison, Caterpillar (10-bolt aperture)
- Speed Ratios: Nine (includes low and high)
- Series: Chelsea 281 Series (evolution of 280 Series)
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
