
281 Series Power Take-Off
Description
The 281 Series Power Take-Off is evidence that Parker Chelsea is constantly investing in finding the world’s greatest solutions to industry challenges. Chelsea’s 281 Series PTO is an evolution of the top-selling 280 Series PTO. Upgrades include a ductile iron bearing cap which is 117% stronger than its predecessor. It also features an o-ring sealing configuration between the housing and bearing cap to improve clamp load and the thickness of the steel discs within the clutch pack have been increased by 80%. All of these improvements are focused on reducing the damaging vibrational effects caused by today’s and future engine designs.
Markets:
• Fire and Rescue
• Truck Cranes
• Pumper Cleaner
• Refuse
Features and Benefits:
• Ductile Iron Bearing Cap – 117% stronger than gray iron.
• Improved Seal – O-ring sealing configuration to reduce vibrational affects and improve clamp load.
• Enhanced Clutch Pack – 80% thicker steel disks in the clutch pack to resist premature tooth wear.
• Torque – Single, continuous duty torque rating.
• 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
| Manufacturer | Parker |
| Model | Off |
| Condition | New |
| Mounting Type | 10-Bolt |
| Continuous Torque | 390 lb-ft (Check Application Pages for Actual Torque Ratings), 529 Nm (Check Application Pages for Actual Torque Ratings) |
| Shift Type | PowerShift (Hydraulic), Hydraulic |
| Continuous Operation | Yes |
| Transmission Manufacturer | Allison |
| Output Type | SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline |
| Lubricant | P = Pressure Lube, W = Wet Spline |
| Intermittent Torque | 301 to 400 lb-ft, 501+ Nm |
| Output Power | 51+ kW, 56+ HP |
| Output Shaft Type | Smart Start - Round Shaft (1-1/4" - 5/16" Key), 3/4" - 11T Pump Spline, SAE B (7/8" - 13T) Pump Spline, SAE C (1-1/4" - 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) |
| Weight | 50 lb, 22.7 kg |




