The Chelsea 281GTFJW-B3RK or 281GTFJWB3RK is a 281 Series hydraulically shifted hot-shift power take-off built for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar applications. The 281 Series carries a continuous torque rating of 390 lb-ft (529 Nm) and delivers 74 HP at 1,000 RPM through nine available speed ratios covering both low and high ranges. A ductile iron bearing cap rated 117% stronger than gray iron and an O-ring sealing configuration between the housing and bearing cap address vibrational stress from modern engine designs. Rotatable cast iron flanges reduce interference fit issues, and the Positive Stop feature on driveline outputs prevents oil seal damage during coupling. Call us to confirm proper fit for your application.
The 281 Series is Chelsea's evolution of the top-selling 280 Series PTO, engineered for fire and rescue, truck cranes, pumper cleaner, and refuse applications. The clutch pack steel discs are 80% thicker than the predecessor design to resist premature tooth wear. Electronic Overspeed Control (EOC) is available to protect driven equipment, and SmartStart reduces shock load at engagement for select applications. Reference documents for this series include the 281/288 Series Parts List (HY25-2281-M1/US) and the 267/281/288/871/878 Series Owner's Manual.
Features
Hydraulic PowerShift (hot-shift) operation on 10-bolt automatic transmission aperture
Ductile iron bearing cap, 117% stronger than gray iron, resists vibrational fatigue
O-ring sealing between housing and bearing cap improves clamp load and reduces vibration effects
Rotatable cast iron flanges reduce pump clearance and interference issues
Nine speed ratios including dedicated low and high speeds; 74 HP output at 1,000 RPM
Wet Spline Lubrication option provides 7 to 10 times greater output shaft life; SmartStart and Electronic Overspeed Control (EOC) available
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Compatible Transmissions: Allison automatic (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- Output Power: 74 HP at 1,000 RPM / 37 HP at 500 RPM
- Speed Ratios: Nine (includes low and high)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube or Wet Spline option
- Series: Chelsea 281
Additional Information
The 281 Series is Chelsea's evolution of the top-selling 280 Series PTO, engineered for fire and rescue, truck cranes, pumper cleaner, and refuse applications. The clutch pack steel discs are 80% thicker than the predecessor design to resist premature tooth wear. Electronic Overspeed Control (EOC) is available to protect driven equipment, and SmartStart reduces shock load at engagement for select applications. Reference documents for this series include 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.
