281GCFJP-B3RS Chelsea PTO Assembly

The Chelsea 281GCFJP-B3RS or 281GCFJPB3RS is a hydraulically shifted, hot-shift Power Take-Off from the Chelsea 281 Series, designed for automatic transmissions with a 10-bolt aperture, primarily Allison and Caterpillar transmissions. The 281 Series is an evolution of the 280 Series, built around 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 clutch pack to resist premature tooth wear. The series supports nine speed ratios spanning low and high ranges, with a continuous torque rating of 390 lb-ft. A genuine Chelsea part available from Pro Gear and Transmission. Call us to confirm proper fit for your application.

Features

Chelsea 281 Series hydraulic hot-shift (PowerShift) PTO for 10-bolt automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and resists vibration effects
80% thicker steel clutch pack discs for reduced premature tooth wear
Nine speed ratios including low and high speeds; continuous torque rated at 390 lb-ft
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Electronic Overspeed Control (EOC) protects driven equipment; SmartStart reduces shock load at engagement
Rotatable cast iron flanges reduce interference clearance issues; Positive Stop for driveline outputs eliminates oil seal damage from coupling

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic (PowerShift / Hot Shift)
• Compatible Transmission Manufacturer: Allison
• Continuous Torque: 390 lb-ft (529 Nm) - verify actual rating on application pages
• Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Output Shaft Types Available: SmartStart Round Shaft (1-1/4" - 5/16" Key), 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
• Lubricant Options: Pressure Lube (P), Wet Spline (W)
• Speed Ratios: Nine, including low and high speeds
• Continuous Operation: Yes
• Output Power: 56+ HP (51+ kW)
• Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM (28 kW at 500 RPM, 55 kW at 1000 RPM)
• Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse

Additional Information

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