281GCFJP-N5AC Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GCFJP-N5AC or 281GCFJPN5AC, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison applications. It mounts via a 10-bolt flange and delivers a single, continuous duty torque rating with nine available speed ratios spanning low and high speeds. The 281 Series improves on the 280 Series with a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between the housing and bearing cap, and an 80% thicker clutch pack to resist premature tooth wear. Rotatable cast-iron flanges reduce pump clearance issues, and the Wet Spline Lubrication option provides 7 to 10 times greater shaft life. Typical 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 hot-shift PTO for 10-bolt automatic transmission apertures, including Allison
Ductile iron bearing cap rated 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
80% thicker steel discs in the clutch pack to resist premature tooth wear
Nine speed ratios covering both low and high speed ranges
Wet Spline Lubrication option extends shaft life 7 to 10 times over standard
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at start-up
Rotatable cast-iron flanges reduce pump clearance interference; Positive Stop for driveline outputs eliminates oil seal damage

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic)
• Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
• Continuous Operation: Yes
• Series Continuous Torque Rating: 390 lb-ft (529 Nm) - verify actual rating for your specific application
• Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Speed Ratios: Nine ratios, including low and high speeds
• Lubrication: Pressure Lube (P) or Wet Spline (W) options
• Series Output Power: 56+ HP (51+ kW)
• Markets: Fire and Rescue, Refuse, Truck Cranes, Pumper-Cleaner

Additional Information

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.