281GGFJP-B3RY Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GGFJP-B3RY or 281GGFJPB3RY, is a hydraulically shifted hot-shift PTO designed for 10-bolt aperture automatic transmissions, commonly Allison applications. The 281 Series builds on the proven 280 Series platform with 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. The series carries a continuous torque rating of 390 lb-ft (529 Nm). Nine speed ratios cover both low and high operating ranges. Rotatable cast-iron flanges reduce interference clearance issues. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your transmission and application.

Features

10-Bolt mounting aperture, compatible with Allison automatic transmissions
Hydraulic PowerShift (hot-shift) operation for engagement under load
390 lb-ft (529 Nm) continuous torque rating
Ductile iron bearing cap, 117% stronger than gray iron
O-ring seal between housing and bearing cap reduces vibration effects and improves clamp load
80% thicker steel clutch pack discs resist premature tooth wear
Nine speed ratios including 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
Rotatable cast-iron flanges reduce pump clearance interference; positive stop for driveline outputs eliminates oil seal damage

Tech Specs

• Mounting: 10-Bolt aperture
• Shift Type: Hydraulic PowerShift (hot-shift)
• Compatible Transmission: Allison automatic transmissions
• Continuous Torque: 390 lb-ft (529 Nm)
• Operation: Continuous duty
• Speed Ratios: Nine, including low and high
• Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
• Lubrication: Pressure lube or Wet Spline option
• Electronic Overspeed Control (EOC): Included

Additional Information

The 281 Series is an evolution of Chelsea's top-selling 280 Series PTO, engineered for fire and rescue, truck cranes, pumper-cleaner, and refuse applications. Applicable Parker Chelsea service documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual. The alternate vendor reference for this part is SP281GGFJP-B3RY. Contact Pro Gear and Transmission to confirm the correct output shaft configuration and gear ratio for your specific chassis and hydraulic system.

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