The Chelsea 281 Series Power Take-Off, part number 281GKFJP-G5XV or 281GKFJPG5XV, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison and Caterpillar transmissions. The 281 Series is an evolution of the Chelsea 280 Series, featuring a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap, and an enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear. Nine speed ratios cover both low and high ranges. The series carries a continuous torque rating of 390 lb-ft and is rated for continuous operation. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline. Applications include fire and rescue, truck cranes, pumper-cleaner, and refuse trucks. Call us to confirm proper fit for your specific transmission and application.
Features
Ductile Iron Bearing Cap - 117% stronger than gray iron for improved durability over the 280 Series
Enhanced Clutch Pack - steel discs are 80% thicker to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
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; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Continuous Operation: Yes
- Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
- Output Type: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Speed Ratios: Nine, including low and high
- Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1,000 RPM
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
