281GSFJP-K3XD Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GSFJP-K3XD or 281GSFJPK3XD, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. It mounts to the 10-bolt face and offers nine speed ratios covering both low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and the clutch pack uses steel discs that are 80% thicker than the previous 280 Series design. An o-ring sealing configuration between the housing and bearing cap improves clamp load and resists the vibrational effects of modern engine designs. Rotatable cast-iron flanges reduce interference clearance issues, and the driveline output includes a positive stop to prevent oil seal damage. 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
80% thicker steel clutch pack discs versus the 280 Series for reduced tooth wear
O-ring seal between housing and bearing cap improves clamp load and vibration resistance
Nine speed ratios including low and high-speed ranges
Wet Spline Lubrication option extends shaft life 7 to 10 times compared to standard
Positive stop on driveline outputs eliminates oil seal damage from coupling
SmartStart reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic Hot-Shift)
• Compatible Transmissions: Allison and Caterpillar automatic transmissions (10-bolt aperture)
• Continuous Operation: Yes
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Speed Ratios: Nine (includes low and high speeds)
• Lubrication Options: Pressure Lube (P), Wet Spline (W)
• Series: Chelsea 281 Series (evolution of 280 Series)
• Part Number: 281GSFJP-K3XD or 281GSFJPK3XD

Additional Information

The Chelsea 281 Series is suited for demanding markets including fire and rescue, truck cranes, pumper cleaners, and refuse vehicles. The 281 Series builds directly on the 280 Series platform with structural and sealing upgrades designed to meet the demands of modern high-vibration engine environments. Parker documents covering this series 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.