The Chelsea 281 Series Power Take-Off, part number 281GTFJP-B3RK or 281GTFJPB3RK, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, commonly used on Allison transmissions. It carries a continuous torque rating of 390 lb-ft and delivers output power of 56+ HP. The 281 Series evolved from the top-selling 280 Series, adding a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration for improved clamp load, and an 80% thicker clutch pack for reduced tooth wear. Nine speed ratios cover both low and high-speed applications. Markets include fire and rescue, refuse, truck cranes, and pumper-cleaner equipment. Call us to confirm proper fit for your application.
Features
10-bolt mounting aperture, compatible with Allison automatic transmissions
Hydraulic PowerShift (hot shift) operation for continuous-duty use
Ductile iron bearing cap, 117% stronger than gray iron
O-ring sealing between housing and bearing cap improves clamp load and resists vibrational effects
80% thicker steel clutch pack discs for reduced premature tooth wear
Nine speed ratios including low and high speeds; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- 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 (including low and high speeds)
- Transmission Compatibility: Allison automatic transmissions
- 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
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
