281GPFJP-B5RZ Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GPFJP-B5RZ or 281GPFJPB5RZ, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. The 281 Series is an evolution of the 280 Series, featuring a ductile iron bearing cap rated 117% stronger than gray iron, an 80% thicker clutch pack steel disc design to resist premature tooth wear, and an O-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibrational effects. Nine speed ratios cover both low and high-speed applications. Rotatable cast iron flanges reduce interference clearance issues, and a Positive Stop for driveline outputs eliminates oil seal damage at the coupling. Call us to confirm proper fit for your specific transmission and application.

Features

Hydraulic PowerShift (hot-shift) operation for use with automatic transmissions
10-bolt mounting aperture, compatible with Allison transmission applications
Ductile iron bearing cap rated 117% stronger than gray iron predecessor
80% thicker steel discs in clutch pack to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap for improved clamp load and vibration resistance
Nine speed ratios including low and high speeds
Rotatable cast iron flanges reduce pump clearance interference
Positive Stop for driveline outputs eliminates oil seal damage at coupling
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: Hydraulic (PowerShift / Hot-Shift)
• Transmission Compatibility: Allison automatic transmissions (10-bolt aperture)
• Speed Ratios: Nine ratios, including low and high speeds
• Continuous Operation: Yes
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Lubricant System: Pressure Lube or Wet Spline option
• Series: Chelsea 281 Series (evolution of 280 Series)

Additional Information

The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaner, and refuse applications. The series hose is included with the assembly. 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. Call us to confirm the correct output shaft configuration and speed ratio for your specific vehicle and driven equipment.

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