The Chelsea 281 Series Power Take-Off, part number 281GCFJP-S5XD or 281GCFJPS5XD, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series evolved from the proven 280 Series platform with several measurable upgrades: 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 80% thicker steel disc clutch pack to resist premature wear. The series carries a single, continuous duty torque rating and supports nine speed ratios spanning both low and high ranges. Rotatable cast-iron flanges reduce interference clearance issues, and an available Wet Spline Lubrication option is rated to deliver 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) protects driven equipment, and SmartStart capability reduces shock load at start-up where applicable. Call us to confirm proper fit for your transmission and application.
The Chelsea 281 Series is suited for demanding vocational markets including fire and rescue, truck cranes, pumper cleaners, and refuse applications. Parker Chelsea reference documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The part number 281GCFJP-S5XD is also referenced as SP281GCFJP-S5XD in some catalog systems.
Features
Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures including Allison and Caterpillar
Ductile iron bearing cap - 117% stronger than gray iron predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios covering both low and high speed ranges
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Tech Specs
- Mounting Type: 10-Bolt aperture (Allison and Caterpillar automatic transmissions)
- Shift Type: PowerShift - Hydraulic (hot-shift)
- Continuous Operation: Yes
- Series Continuous Torque: 390 lb-ft (529 Nm) - check application pages for actual torque rating
- Series Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM / 74 HP at 1000 RPM (28 kW at 500 RPM / 55 kW at 1000 RPM)
- Speed Ratios: Nine ratios including low and high speeds
- Lubrication: Pressure Lube or Wet Spline options
- Positive Stop for Driveline Outputs: Yes - eliminates oil seal damage from coupling
- SmartStart: Available - reduces shock load at start-up
- Electronic Overspeed Control (EOC): Included
Additional Information
The Chelsea 281 Series is suited for demanding vocational markets including fire and rescue, truck cranes, pumper cleaners, and refuse applications. Parker Chelsea reference documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The part number 281GCFJP-S5XD is also referenced as SP281GCFJP-S5XD in some catalog systems.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
