281GCFJP-D8RY Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GCFJP-D8RY or 281GCFJPD8RY, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series is an evolution of the 280 Series, adding 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 resist vibration, and an 80% thicker clutch pack to fight premature tooth wear. Nine speed ratios cover both low- and high-speed demands. Output options include SAE B and SAE C pump flanges, ISO 7652 flange, and driveline outputs with a positive stop to prevent oil seal damage. Call us to confirm proper fit for your transmission and application.

Features

10-bolt mounting for Allison and Caterpillar automatic transmissions
Hydraulic PowerShift (hot-shift) operation supports continuous-duty use
Ductile iron bearing cap, 117% stronger than gray iron
O-ring seal between housing and bearing cap reduces vibration effects and improves clamp load
Clutch pack steel discs are 80% thicker than the predecessor 280 Series for reduced tooth wear
Nine speed ratios including low and high speeds
Wet spline lubrication option extends shaft life 7 to 10 times compared to standard
Electronic Overspeed Control (EOC) protects driven equipment
SmartStart reduces shock load at start-up for select applications
Positive stop on driveline outputs eliminates oil seal damage from coupling
Rotatable cast-iron flanges reduce pump clearance interference

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: Hydraulic (PowerShift / Hot-Shift)
• Compatible Transmissions: Allison and Caterpillar automatic transmissions
• Continuous Operation: Yes
• Continuous Torque: 390 lb-ft (529 Nm) - see application pages for actual ratings
• Intermittent Torque: 301 to 400 lb-ft (501+ Nm)
• 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)
• Speed Ratios: Nine, including low and high speeds
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Output Shaft Options: SmartStart Round Shaft (1-1/4 in. - 5/16 in. Key), 3/4 in. 11T Pump Spline, SAE B 7/8 in. 13T Pump Spline, SAE C 1-1/4 in. 14T Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange
• Lubrication: Pressure Lube or Wet Spline option
• Markets: Fire and Rescue, Truck Cranes, Pumper Cleaner, Refuse

Additional Information

The Chelsea 281 Series replaces and improves upon the 280 Series platform. Relevant Parker Chelsea documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US), the 267/281/288/871/878 Series Owner's Manual, and the 281 Series Sales Literature. The part number 281GCFJP-D8RY is also referenced as SP281GCFJP-D8RY in some catalog records.

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