281GCFJP-G3RF Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GCFJP-G3RF or 281GCFJPG3RF, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, most commonly Allison units. It carries a single, continuous-duty torque rating up to 390 lb-ft and delivers nine selectable speed ratios spanning low and high ranges. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing the vibration effects driven by modern engine designs. Rotatable cast-iron flanges reduce interference clearance issues, and a Positive Stop on driveline outputs eliminates oil seal damage from coupling. Call us to confirm proper fit for your specific transmission and application.

Features

Hydraulic PowerShift (hot-shift) operation, designed for 10-bolt automatic transmissions including Allison
Ductile iron bearing cap rated 117% stronger than gray iron for increased durability
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibrational effects
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios available, including low and high-speed options
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; SmartStart reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic PowerShift (Hot-Shift)
• Continuous Operation: Yes
• Continuous Torque (Series): 390 lb-ft / 529 Nm (verify actual rating on application page)
• Intermittent Torque Range (Series): 301-400 lb-ft / 501+ Nm
• Output Power (Series): 56+ HP / 51+ kW
• Shaft Power (Series): 37 HP at 500 RPM; 74 HP at 1000 RPM
• Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Output Shaft Options: 1-1/4" Round with 5/16" Key (SmartStart), 3/4"-11T Pump Spline, SAE B 7/8"-13T Pump Spline, SAE C 1-1/4"-14T Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange
• Lubrication: Pressure Lube or Wet Spline options
• Transmission Compatibility: Allison (10-bolt aperture)

Additional Information

Parts manual and diagrams: Chelsea 281 Series PTO parts list with prices