281GSFJP-G5XD Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off assembly, part number 281GSFJP-G5XD or 281GSFJPG5XD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. Built as an evolution of the 280 Series, the 281 Series adds 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 steel disc to resist premature tooth wear. Nine speed ratios span low and high ranges. Rotatable cast-iron flanges reduce interference with pump clearance, and a Wet Spline lubrication option extends shaft life by 7 to 10 times. Applications include fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. Call us to confirm proper fit for your transmission and application.

Features

Hydraulic hot-shift (PowerShift) design for 10-bolt automatic transmission apertures, including Allison applications
Ductile iron bearing cap rated 117% stronger than gray iron for greater durability
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced clutch pack with steel discs 80% thicker than the predecessor 280 Series
Nine speed ratios covering 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 aperture
• Shift Type: PowerShift (Hydraulic hot-shift)
• Continuous Operation: Yes
• Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
• Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
• Speed Ratios: Nine (including low and high)
• Lubrication: Pressure lube or Wet Spline option
• Compatible Transmission Manufacturers: Allison
• Applicable Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse

Additional Information

Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices