281GGFJP-B3SD Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GGFJP-B3SD or 281GGFJPB3SD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. It is an evolution of 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 for improved clamp load, and an 80% thicker steel clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high-speed applications. The Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement, and Electronic Overspeed Control (EOC) protects driven equipment. Cross-reference: 280GGFJP-B3SD or 280GGFJPB3SD. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your application.

Features

Hydraulic (PowerShift) hot-shift operation for Allison 10-bolt automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap reduces vibrational effects and improves clamp load
80% thicker steel discs in the clutch pack to 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 interference/clearance issues; Positive Stop for driveline outputs eliminates oil seal damage

Tech Specs

• Mounting: 10-Bolt
• Shift Type: Hydraulic (PowerShift) Hot-Shift
• Compatible Transmission: Allison automatic transmissions
• Continuous Torque Rating (Series): 390 lb-ft (529 Nm)
• Output Power (Series): 56+ HP (51+ kW)
• Speed Ratios: Nine (including low and high)
• Lubrication: Pressure Lube or Wet Spline option
• Cross Reference: 280GGFJP-B3SD or 280GGFJPB3SD

Additional Information

The Chelsea 281 Series is suited for demanding continuous-duty applications including fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. The series supports multiple output types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, and driveline outputs. Available output shaft options across the series include a 1-1/4 in. round SmartStart shaft, 3/4 in. 11-tooth pump spline, SAE B (7/8 in. 13-tooth) pump spline, SAE C (1-1/4 in. 14-tooth) pump spline, 1410 companion flange, and DIN flange configurations. Relevant Parker Chelsea reference documents include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.

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