Parker Hannifin Chelsea 281 Series Power Take-Off (PTO) Assy, 35:37 Gear Ratio, 390 lb-ft Continuous Torque
Product Overview
The 281 series power take-off from Parker Chelsea is an evolution of the top-selling 280 series PTO, designed to meet industry challenges with enhanced durability and performance. Upgrades include a ductile iron bearing cap that is 117% stronger than its predecessor, an O-ring sealing configuration between the housing and bearing cap to improve clamp load and reduce vibrational effects, and clutch pack steel discs increased in thickness by 80% to resist premature tooth wear. These improvements help reduce damaging vibrations caused by modern engine designs, ensuring reliable continuous operation.Power Take Off, 10-Bolt Mounting, Smart Start - Round Shaft (1-1/4 in - 5/16 in Key), 3/4 in - 11T Pump Spline, SAE B (7/8 in - 13T) Pump Spline, SAE C (1-1/4 in - 14T) Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange Output Shaft, SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline Output, 12 VDC Electric/Hydraulic Shift, Continuous Operation, 390 lb-ft, 529 Nm Continuous Torque, 35:37 Gear Ratio, 301 to 400 lb-ft, 501+ Nm Intermittent Torque, Pressure Lube Lubricant, 51+ kW, 56+ hp Output Power, 37 hp (500 rpm), 74 hp (1000 rpm), 28 kW (500 rpm), 55 kW (1000 rpm) Shaft Power, For 281
Features & Benefits
- Ductile iron bearing cap – 117% stronger than gray iron
- Improved seal – O-ring sealing configuration to reduce vibrational effects and improve clamp load
- Enhanced clutch pack – 80% thicker steel discs in the clutch pack to resist premature tooth wear
- Torque – single, continuous duty torque rating of 390 lb-ft (529 Nm)
- Clearance – rotatable cast iron flanges to improve pump clearance
- Positive stop for driveline outputs – eliminates oil seal damage from coupling
- Wet spline lubrication option – provides 7 to 10 times greater shaft life
- Speeds nine speed ratios including low and high-speeds
- Smartstart – reduces shock load at start-up for certain applications
- Insurance – electronic overspeed control (EOC) protects driven equipment
Specifications
| Gear Ratio | 35:37 |
| Lubricant | Pressure Lube |
| Output Power | 51+ kW, 56+ hp |
| Output Type | SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline |
| Type | Power Take-Off (PTO) Assembly |
| Continuous Torque | 390 lb-ft, 529 Nm |
| Continuous Operation | Yes |
| Fits Models | 281 |
| Intermittent Torque | 301 to 400 lb-ft, 501+ Nm |
| Mounting Type | 10-Bolt |
| Output Shaft Type | Smart Start - Round Shaft (1-1/4 in - 5/16 in Key), 3/4 in - 11T Pump Spline, SAE B (7/8 in - 13T) Pump Spline, SAE C (1-1/4 in - 14T) Pump Spline, DIN 5462 Pump Spline, 1410 Companion Flange, DIN 120 Flange, DIN 100 Flange |
| Shaft Power | 37 hp (500 rpm), 74 hp (1000 rpm), 28 kW (500 rpm), 55 kW (1000 rpm) |
| Shift Type | 12 VDC Electric/Hydraulic |
| Product Category | Power Take Off |
| Weight | 50 lb |