Genuine replacement part 860-520 is a set screw used to secure components such as pulleys, gears, or handles on compatible sprayer models. A worn, stripped, or damaged set screw can cause slippage, misalignment, or component loosening during operation. Replacing with this genuine set screw ensures proper clamping force and reliable mechanical retention on compatible PowrBeast, PowrLiner, PowrTex, PowrTwin, and ProMark II units.
| Part Number | 860-520 |
|---|---|
| Part Description | Set Screw |
| Brand | PowrBeast / PowrLiner / PowrTex / PowrTwin / ProMark II |
| Fits |
|
| Condition | New |
The 860-520 Set Screw is a precision fastener used to secure rotating components such as pulleys, gears, cams, or control handles on a wide range of sprayer models. It provides positive clamping force to prevent slippage and maintain accurate alignment during operation.
A worn, stripped, or damaged set screw can lead to component loosening, misalignment, erratic operation, or mechanical failure. Replacing with a genuine 860-520 set screw restores proper clamping force and ensures reliable performance.
| Component retention | Secures pulleys, gears, handles, and other parts to shafts or mounting points |
|---|---|
| Anti-slip clamping | Provides strong holding force to prevent loosening from vibration or torque |
| Precision fit | Manufactured to exact specifications for proper thread engagement and clamping |
| Stripped threads | Screw will not tighten properly or spins freely |
|---|---|
| Worn drive | Hex socket or slot is rounded out, making removal/installation difficult |
| Corrosion / rust | Visible rust or corrosion that compromises strength or adjustment |
| Component slippage | Pulley, gear, or handle slips on shaft despite tightening |
Part 860-520 is compatible with the following PowrBeast, PowrLiner, PowrTex, PowrTwin, and ProMark II models. Always confirm fitment using the correct parts diagram for your exact machine.
| Brand / Model | Component |
|---|---|
| PowrBeast: 4700, 7700, 9700, 4700T | Set Screw (860-520) |
| PowrLiner: 4955, 6955, 8955, 2800, 4000, 4900XLT, 4900, 5000, 6000, 6900XLT, 6900 XLT SP, 4950, 6950, 8950, 8900XLT SP, 8900XLT, 8900 | Set Screw (860-520) |
| PowrTex: 6900SF, 12000SV | Set Screw (860-520) |
| PowrTwin: 12000 GHD, 12000XLT DI, 12000XLT, 12000GH, 12000GHD, 6900 Plus DI, 12000 Plus DI, 4500, 3500 (50th Anniversary Special), 4900XLT, 4900GH, 6900 XLT DI, 6900 XLT, 4900, 6900, 8900, 12000, 8900XLT, 6900GH, 8900GH | Set Screw (860-520) |
| ProMark II: Model No. 759-2010 | Set Screw (860-520) |
When replacing a set screw, it's often a good opportunity to inspect these related components:
Check for burrs, wear, or damage where the set screw clamps. A damaged shaft may require attention even with a new screw.
Worn keys or keyways can contribute to slippage. Inspect and replace if necessary.
If the threads in the component are damaged, a helicoil or replacement part may be needed.
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