Part 763-549 is a replacement lock nut for a wide range of compatible spray equipment. This nut resists loosening from vibration, ensuring secure fastening in critical applications. When the original lock nut becomes stripped, corroded, or loses its locking ability, replacement restores proper fastening integrity.
| Part Number | 763-549 |
|---|---|
| Part Description | Lock Nut |
| Brand | Universal |
| Fits | 640 i Airless Sprayer; 640 IX Airless Sprayer; 690 GXC Airless Sprayer; 740 i Airless Sprayer; 740 IX ; 740 ix Airless Sprayer; Advantage GPX 85; Advantage GPX 220; Elite E55; Elite G40; HVLP Airspray ProFinish C100; HVLP Airspray Profinish TS40 TS 50; Performer 640 i Airless Sprayer; PowrLiner 2850 GB_D_F; PowrLiner 4955, 6955, 8955; PowrLiner 800; PowrLiner 1800M, 2800M; PowrLiner 2800; PowrLiner 4900 XLT; PowrLiner 4900; PowrLiner 4950; PowrLiner 6900 XLT SP; PowrLiner 6900 XLT; PowrLiner 6950; PowrLiner 6950_1; PowrLiner 8900 XLT SP; PowrLiner 8900 XLT; PowrLiner 8900; ProMark II; RentSpray Plus; SprayTech GPX 85 |
| Condition | New |
The 763-549 lock nut is a direct replacement fastener for a wide range of spray equipment including numerous Airless Sprayer models (640 i, 640 IX, 690 GXC, 740 i, 740 IX, 740 ix), Advantage GPX 85 and GPX 220, Elite E55 and G40, HVLP Airspray ProFinish C100 and Profinish TS40 TS 50, Performer 640 i Airless Sprayer, various PowrLiner models (2850 GB_D_F, 4955/6955/8955, 800, 1800M/2800M, 2800, 4900 XLT, 4900, 4950, 6900 XLT SP, 6900 XLT, 6950, 6950_1, 8900 XLT SP, 8900 XLT, 8900), ProMark II, RentSpray Plus, and SprayTech GPX 85. A lock nut is a specialized nut that resists loosening under vibration and torque. It achieves this through various mechanisms such as a nylon insert (nylock nut), deformed threads, or a prevailing torque feature. This ensures that fasteners remain tight in applications subject to constant vibration from engines and pumps. A worn or damaged lock nut can lose its locking ability, leading to loosening and potential component failure. This replacement lock nut is manufactured to exact specifications for thread size and locking feature.
| Vibration resistance | Prevents loosening under vibration |
|---|---|
| Secure fastening | Maintains clamping force over time |
| Prevailing torque | Provides additional friction to resist rotation |
| Stripped threads | Nut will not tighten properly |
|---|---|
| Worn locking feature | Nylon insert worn, nut spins freely |
| Corrosion damage | Rust has weakened nut |
| Missing nut | Nut lost during operation |
Lock nut 763-549 is compatible with the following models. Verify fit using your equipment's parts diagram.
| Compatible Series | Models (partial list) |
|---|---|
| Airless Sprayers | 640 i, 640 IX, 690 GXC, 740 i, 740 IX, 740 ix |
| Advantage / Elite | GPX 85, GPX 220; Elite E55, G40 |
| HVLP Airspray | ProFinish C100, Profinish TS40 TS 50 |
| Performer | 640 i Airless Sprayer |
| PowrLiner | 2850 GB_D_F, 4955/6955/8955, 800, 1800M/2800M, 2800, 4900 XLT, 4900, 4950, 6900 XLT SP, 6900 XLT, 6950, 6950_1, 8900 XLT SP, 8900 XLT, 8900 |
| ProMark / RentSpray | ProMark II; RentSpray Plus |
| SprayTech | GPX 85 |
When replacing lock nuts, inspect these associated components to ensure proper fastening.
Check threads for damage; replace if worn.
Ensure washers are present and not deformed.
Ensure surface is clean and not damaged.
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