The Chelsea 281 Series Power Take-Off, part number 281GCFJP-K5RF or 281GCFJPK5RF, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison transmissions. 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 to improve clamp load, and an 80% thicker clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high-speed applications. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. 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 transmission and application.
Features
Chelsea 281 Series hydraulic PowerShift (hot-shift) PTO for 10-bolt automatic transmission apertures, including Allison
Ductile iron bearing cap - 117% stronger than gray iron for increased durability over the 280 Series predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap reduces vibrational effects and improves clamp load
Nine speed ratios available, spanning both low and high-speed ranges
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) - Hot Shift
- Compatible Transmission: Allison automatic transmissions
- Continuous Torque: 390 lb-ft (529 Nm) - see application pages for actual ratings
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Shaft Options: SAE B (7/8 in. - 13T) Pump Spline, SAE C (1-1/4 in. - 14T) Pump Spline, 3/4 in. - 11T Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, SmartStart Round Shaft (1-1/4 in. - 5/16 in. Key)
- Speed Ratios: Nine ratios, including low and high speeds
- Lubrication: Pressure Lube or Wet Spline option
- Continuous Operation: Yes
- Part Number: 281GCFJP-K5RF or 281GCFJPK5RF
Additional Information
Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices
