281GMFJP-E5RK Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GMFJP-E5RK or 281GMFJPE5RK, is a hydraulically shifted (PowerShift) PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. The 281 Series evolved from the top-selling 280 Series with measurable structural upgrades: 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 steel disc clutch pack for reduced tooth wear. Nine speed ratios cover both low and high output demands. Wet Spline Lubrication extends shaft life 7 to 10 times compared to standard configurations. Electronic Overspeed Control (EOC) is included for equipment protection. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm fit for your specific transmission and application.

Features

10-Bolt mounting aperture, compatible with Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot shift) operation for engagement under load
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring seal between housing and bearing cap reduces vibrational effects and improves clamp load
80% thicker steel discs in the clutch pack resist premature tooth wear
Nine speed ratios spanning low and high output ranges
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart output reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting: 10-Bolt aperture
• Shift Type: PowerShift (Hydraulic hot shift)
• Compatible Transmissions: Allison automatic transmissions (10-bolt aperture)
• Speed Ratios: Nine ratios, including low and high speeds
• Continuous Torque Rating (series): 390 lb-ft (529 Nm)
• Intermittent Torque (series): 301-400 lb-ft
• Output Power (series): 56+ HP (51+ kW)
• Shaft Power (series): 37 HP at 500 RPM, 74 HP at 1000 RPM
• Lubrication: Pressure Lube with Wet Spline option available
• Clutch Pack: Steel discs 80% thicker than prior generation
• Bearing Cap Material: Ductile iron
• Seal Configuration: O-ring between housing and bearing cap
• Part Number: 281GMFJP-E5RK or 281GMFJPE5RK

Additional Information

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