

Lesson part 506-259 is a fan cover guard used to protect the motor cooling fan and surrounding area on compatible spray equipment. The guard creates a protective barrier that helps prevent debris, foreign objects, and accidental contact from interfering with the rotating fan while maintaining adequate airflow for motor cooling. This replacement guard restores proper fan protection and safety coverage when the original becomes cracked, damaged, or missing.
| Part Number | 506-259 |
|---|---|
| Part Description | Fan Cover Guard |
| Brand | Lesson |
| Fits | PowrTwin, PowrTex, PowrLiner models (see compatibility) |
| Condition | New |
The Lesson fan cover guard 506-259 is a direct replacement protective component designed to shield the motor cooling fan on compatible sprayers. The cooling fan is a critical component that draws air across the motor windings to dissipate heat during operation. Without proper guarding, the rotating fan blades are vulnerable to impact from dropped tools, contact with surrounding equipment, or ingestion of debris such as overspray material, dirt, or loose hardware. A damaged or missing fan guard compromises operator safety by exposing moving parts and leaves the fan susceptible to physical damage that can lead to blade breakage, imbalance, and reduced cooling efficiency. This guard mounts securely around the fan area to create a physical barrier that deflects foreign objects while maintaining unobstructed airflow paths. The guard is constructed from durable materials designed to withstand the demanding conditions of job site use, including vibration, temperature variation, and incidental contact. When the original guard becomes cracked, warped, or lost, replacing it restores the intended safety and protective function. Maintaining proper fan guarding is essential for both equipment reliability and safe operation, as an unprotected fan can become a source of mechanical failure or personal injury. This replacement component ensures the cooling system remains fully protected and operational.
| Physical protection | Shields the rotating fan from impact with tools, equipment, or foreign objects |
|---|---|
| Debris deflection | Prevents overspray, dirt, and loose materials from entering the fan area and causing imbalance or obstruction |
| Safety barrier | Creates a guard between moving fan blades and operator or bystander contact |
| Cracks or fractures | Visible damage to the guard structure that compromises its protective integrity |
|---|---|
| Missing sections | Portions of the guard broken away, leaving the fan partially exposed |
| Loose fitment | Guard does not securely attach to the motor housing due to warping or broken mounting points |
| Fan contact | Guard has shifted or deformed to the point where it contacts or interferes with the rotating fan |
Lesson part 506-259 is compatible with the following spray equipment models. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Equipment Model | Component |
|---|---|
| PowrTwin TM 8900 XLT | Fan cover guard |
| PowrTwin 12000GHD | Fan cover guard |
| PowrTwin 12000GH | Fan cover guard |
| PowrTwin 12000GH Insert | Fan cover guard |
| PowrTwin 12000 XLT | Fan cover guard |
| PowrTwin 12000 XLT DI | Fan cover guard |
| PowrTwin 12000 Plus DI service | Fan cover guard |
| PowrTwin 12000 GHD | Fan cover guard |
| PowrTwin 8900GH | Fan cover guard |
| PowrTwin 6900GH | Fan cover guard |
| PowrTwin 6900 XLT | Fan cover guard |
| PowrTwin 6900 XLT DI | Fan cover guard |
| PowrTwin 6900 , 12000 Plus DI | Fan cover guard |
| PowrTwin 4900GH | Fan cover guard |
| PowrTwin 4900 XLT | Fan cover guard |
| PowrTwin 4900 , 6900 , 8900, 12000 Plus | Fan cover guard |
| PowrTwin 3500 50th anniversary | Fan cover guard |
| PowrTex 6900SF, 12000SV | Fan cover guard |
| PowrTex 6900SF, 12000SV 0528919D | Fan cover guard |
| PowrLiner 8900 | Fan cover guard |
| PowrLiner 8900 XLT | Fan cover guard |
| PowrLiner 8900 XLT SP | Fan cover guard |
| PowrLiner 6950_1 | Fan cover guard |
| PowrLiner 6950 | Fan cover guard |
| PowrLiner 6900 XLT | Fan cover guard |
| PowrLiner 6900 XLT SP | Fan cover guard |
| PowrLiner 5000 | Fan cover guard |
| PowrLiner 4950 | Fan cover guard |
| PowrLiner 4900 | Fan cover guard |
| PowrLiner 4900 XLT | Fan cover guard |
| PowrLiner 4000 | Fan cover guard |
| PowrLiner 4955, 6955, 8955 | Fan cover guard |
When addressing fan guard damage or cooling system integrity, these components are commonly inspected or replaced at the same time.
If the guard was damaged by impact or debris, the fan blades underneath may also have sustained cracks or imbalance.
The shroud directs airflow across the motor and may be damaged alongside the guard.
Screws, clips, or fasteners that secure the guard may be lost or damaged during removal.