The Chelsea 281 Series Power Take-Off, part number 281GMFJP-B3BD or 281GMFJPB3BD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison and Caterpillar transmissions. The 281 Series carries a continuous torque rating of 390 lb-ft and delivers over 56 HP output. It mounts with a 10-bolt pattern and offers nine speed ratios spanning low and high ranges. A ductile iron bearing cap, 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improve clamp load and resist the vibrational effects of modern engine designs. The clutch pack features steel discs 80% thicker than those in the predecessor 280 Series, reducing premature tooth wear. Wet Spline Lubrication provides 7 to 10 times greater shaft life. SmartStart reduces shock load at start-up, and Electronic Overspeed Control protects driven equipment. Call us to confirm proper fit for your transmission and application.
The Chelsea 281 Series is an evolution of the top-selling 280 Series PTO, engineered for fire and rescue apparatus, truck cranes, pumper cleaners, and refuse vehicles. Rotatable cast-iron flanges reduce interference issues at the pump mount. A positive stop for driveline outputs eliminates oil seal damage from coupling. The hose is included with the assembly. Parker 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. Part number also referenced as SP281GMFJP-B3BD. Not sure this is the right PTO for your application? Give us a call.
Features
Chelsea 281 Series hydraulic PowerShift (hot-shift) PTO for 10-bolt automatic transmission apertures, including Allison
Continuous torque rating: 390 lb-ft; output power exceeds 56 HP
Ductile iron bearing cap, 117% stronger than gray iron predecessor
Enhanced clutch pack with steel discs 80% thicker than 280 Series for reduced tooth wear
Nine speed ratios including low and high speeds
Wet Spline Lubrication option provides 7 to 10 times greater shaft life
SmartStart reduces start-up shock load; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (Hot-Shift)
- Continuous Torque: 390 lb-ft (529 Nm)
- Output Power: 56+ HP (51+ kW)
- Shaft Power: 37 HP at 500 RPM, 74 HP at 1000 RPM
- Speed Ratios: Nine (low and high speeds included)
- Transmission Compatibility: Allison and Caterpillar automatic transmissions (10-bolt aperture)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube or Wet Spline option
- Continuous Operation: Yes
Additional Information
The Chelsea 281 Series is an evolution of the top-selling 280 Series PTO, engineered for fire and rescue apparatus, truck cranes, pumper cleaners, and refuse vehicles. Rotatable cast-iron flanges reduce interference issues at the pump mount. A positive stop for driveline outputs eliminates oil seal damage from coupling. The hose is included with the assembly. Parker 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. Part number also referenced as SP281GMFJP-B3BD. Not sure this is the right PTO for your application? Give us a call.
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
