281GGFJP-D5AC Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GGFJP-D5AC or 281GGFJPD5AC, is a hydraulically shifted (PowerShift) hot-shift PTO engineered for 10-bolt automatic transmissions, including Allison and Caterpillar applications. This unit is an evolution of the 280 Series, with a ductile iron bearing cap rated 117% stronger than gray iron and an 80% thicker steel clutch-pack disc for improved wear resistance. An O-ring sealing configuration between the housing and bearing cap improves clamp load and resists engine-induced vibration. Output options include SAE B and SAE C pump flanges, ISO 7652 flange, and driveline configurations. Nine available speed ratios cover both low- and high-speed applications. The hose is included. Call us to confirm proper fit for your specific transmission and application.

Features

10-bolt mounting for Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot-shift) operation for engagement under load
Ductile iron bearing cap, 117% stronger than gray iron predecessor
80% thicker steel clutch-pack discs to reduce premature tooth wear
O-ring seal between housing and bearing cap improves clamp load and vibration resistance
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart feature reduces shock load at start-up for select applications
Electronic Overspeed Control (EOC) protects driven equipment
Positive stop for driveline outputs eliminates oil seal damage from coupling
Hose included

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic Hot-Shift)
• Transmission Compatibility: Allison and Caterpillar automatic transmissions
• Continuous Operation: Yes
• Series Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application page
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Speed Ratios: Nine ratios including low and high speeds
• Lubricant Type: Pressure Lube (P) or Wet Spline (W) options
• Series Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM

Additional Information

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