

Lesson part 506-260 is an ON/OFF switch used to control power delivery to the motor and control circuits on compatible spray equipment. The switch provides reliable starting and stopping of the unit during operation. This replacement switch restores proper power control function when the original becomes intermittent, fails to make contact, or shows signs of electrical or physical damage.
| Part Number | 506-260 |
|---|---|
| Part Description | ON/OFF Switch |
| Brand | Lesson |
| Fits | PowrTwin, PowrTex, PowrLiner models |
| Condition | New |
The Lesson ON/OFF switch 506-260 is a direct replacement power control component designed for compatible sprayers. This switch serves as the primary interface for starting and stopping the unit, completing the electrical circuit between the power source and the motor control system. During normal operation, the switch must reliably make and break electrical contact under varying conditions, including exposure to vibration, moisture, and temperature changes common in job site environments. Over time, internal contacts can become pitted, corroded, or worn from repeated use, leading to intermittent operation, failure to start, or unexpected shutdowns. The switch housing may also sustain physical damage from impact or exposure to overspray and cleaning agents. A failing switch can manifest as a unit that requires multiple toggles to start, loses power during operation, or shows no response when activated. Replacing a degraded switch restores positive electrical contact and predictable control response. This replacement component is constructed to meet original equipment specifications, ensuring proper fitment and reliable performance. Maintaining a functional power switch is essential for safe and efficient equipment operation, allowing the operator to confidently control the unit throughout the workday.
| Power control | Completes and interrupts electrical circuit to start and stop the motor and control system |
|---|---|
| Operator interface | Provides reliable manual control for safe equipment operation and shutdown |
| Circuit protection | Proper switching action helps prevent arcing or contact degradation that can affect performance |
| Intermittent operation | Unit starts inconsistently or requires multiple switch toggles to engage |
|---|---|
| No power | Switch shows no response when activated despite confirmed power source |
| Unexpected shutdowns | Equipment loses power during operation without tripping breakers or thermal protection |
| Physical damage | Cracked housing, loose actuator, or visible corrosion on terminals |
Lesson part 506-260 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 | ON/OFF switch |
| PowrTwin 12000GHD | ON/OFF switch |
| PowrTwin 12000GH | ON/OFF switch |
| PowrTwin 12000GH Insert | ON/OFF switch |
| PowrTwin 12000 XLT | ON/OFF switch |
| PowrTwin 12000 XLT DI | ON/OFF switch |
| PowrTwin 12000 Plus DI service | ON/OFF switch |
| PowrTwin 12000 GHD | ON/OFF switch |
| PowrTwin 8900GH | ON/OFF switch |
| PowrTwin 6900GH | ON/OFF switch |
| PowrTwin 6900 XLT | ON/OFF switch |
| PowrTwin 6900 XLT DI | ON/OFF switch |
| PowrTwin 6900 , 12000 Plus DI | ON/OFF switch |
| PowrTwin 4900GH | ON/OFF switch |
| PowrTwin 4900 XLT | ON/OFF switch |
| PowrTwin 4900 , 6900 , 8900, 12000 Plus | ON/OFF switch |
| PowrTex 6900SF, 12000SV | ON/OFF switch |
| PowrTex 6900SF, 12000SV 0528919D | ON/OFF switch |
| PowrLiner 8900 | ON/OFF switch |
| PowrLiner 8900 XLT | ON/OFF switch |
| PowrLiner 8900 XLT SP | ON/OFF switch |
| PowrLiner 6950_1 | ON/OFF switch |
| PowrLiner 6950 | ON/OFF switch |
| PowrLiner 6900 XLT | ON/OFF switch |
| PowrLiner 6900 XLT SP | ON/OFF switch |
| PowrLiner 5000 | ON/OFF switch |
| PowrLiner 4950 | ON/OFF switch |
| PowrLiner 4900 | ON/OFF switch |
| PowrLiner 4900 XLT | ON/OFF switch |
| PowrLiner 4000 | ON/OFF switch |
| PowrLiner 4955, 6955, 8955 | ON/OFF switch |
Electrical system issues often involve multiple components. When servicing the ON/OFF switch, these parts are commonly inspected at the same time.
Damaged cords or loose connections can mimic switch failure by causing intermittent power loss.
A tripped breaker or blown fuse may prevent power from reaching the switch.
Loose or corroded terminals at the switch or control board can cause intermittent operation.