281GTFJW-D5RK Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GTFJW-D5RK or 281GTFJWD5RK, is a hydraulically shifted (PowerShift) hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, commonly paired with Allison transmissions. It offers nine speed ratios covering both low and high ranges, and outputs include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. The 281 Series evolved from the popular 280 Series with a ductile iron bearing cap rated 117% stronger than gray iron, an enhanced clutch pack with 80% thicker steel discs, and an o-ring sealing configuration to improve clamp load and reduce vibration-related wear. Rotatable cast-iron flanges ease pump clearance, and the wet spline lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) and SmartStart round out the protection package. Call us to confirm proper fit for your application.

Features

Hydraulic PowerShift (hot-shift) operation for automatic transmissions
10-bolt mounting aperture, compatible with Allison transmissions
Nine speed ratios including low and high-speed ranges
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Wet spline lubrication option delivers 7 to 10 times greater shaft life
O-ring sealing configuration between housing and bearing cap improves clamp load
Rotatable cast-iron flanges reduce pump clearance interference
SmartStart feature reduces shock load at start-up
Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt
• Shift Type: PowerShift (Hydraulic Hot-Shift)
• Compatible Transmission: Allison automatic transmissions
• Continuous Torque Rating (Series): 390 lb-ft (529 Nm)
• 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: 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, SmartStart Round Shaft 1-1/4" with 5/16" Key
• Lubrication: Pressure Lube or Wet Spline option
• Continuous Operation: Yes
• Part Number: 281GTFJW-D5RK or 281GTFJWD5RK

Additional Information

The 281 Series is an evolution of Chelsea's top-selling 280 Series PTO, designed for demanding vocational markets including fire and rescue, truck cranes, pumper-cleaner trucks, and refuse vehicles. A hose is included with the assembly, eliminating the need for a separate order. The Positive Stop feature for driveline outputs prevents oil seal damage caused by coupling contact. For reference documentation, Parker Chelsea publishes 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.