The Chelsea 281 Series Power Take-Off, part number 281GMFJP-K3XD or 281GMFJPK3XD, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It carries a continuous torque rating of 390 lb-ft and delivers 56+ HP of output power. Nine speed ratios cover both low and high speed applications. The ductile iron bearing cap is 117% stronger than gray iron, and an 80% thicker clutch pack resists premature tooth wear. An O-ring sealing configuration between the housing and bearing cap improves clamp load and reduces vibrational effects from modern engine designs. Wet Spline Lubrication provides 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) protects driven equipment. Common markets include fire and rescue, truck cranes, pumper cleaner, and refuse. Call us to confirm proper fit for your specific transmission application.
Features
Chelsea 281 Series hydraulic hot-shift (PowerShift) PTO, 10-bolt aperture mount
Continuous torque rating: 390 lb-ft; output power: 56+ HP
Ductile iron bearing cap, 117% stronger than gray iron
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
O-ring sealing configuration between housing and bearing cap to reduce vibrational effects and improve clamp load
Nine speed ratios including low and high speeds; SmartStart reduces shock load at start-up
Electronic Overspeed Control (EOC) protects driven equipment; Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Tech Specs
- Mounting Type: 10-Bolt aperture
- Shift Type: PowerShift (Hydraulic), hot-shift
- Transmission Compatibility: Allison automatic transmissions
- 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
- 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. with 5/16 in. key), 3/4 in. 11-tooth pump spline, SAE B 7/8 in. 13-tooth pump spline, SAE C 1-1/4 in. 14-tooth pump spline, DIN 5462 pump spline, 1410 companion flange, DIN 120 flange, DIN 100 flange
- Lubrication: Pressure Lube or Wet Spline options
- 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.
