Part 550-454 is a replacement long trigger screw for the Airless LX-70 Inline Gun. This screw serves as a pivot pin or mounting fastener within the trigger assembly, securing the trigger mechanism to the gun body while allowing smooth actuation during operation. When the trigger screw becomes worn, damaged, or lost, replacing this component restores proper trigger function and reliable gun operation.
| Part Number | 550-454 | |
|---|---|---|
| Part Description | Long Trigger Screw | |
| Brand | SprayTech | |
| Fits | Airless LX-70 Inline Gun | |
| Condition | New |
Part 550-454 is a replacement long trigger screw specifically designed for the Airless LX-70 Inline Gun. This fastener serves as a critical component within the trigger assembly, functioning as the pivot point or mounting hardware that secures the trigger to the gun body while enabling smooth mechanical actuation. The trigger screw passes through the trigger mechanism and engages with threaded mounting points on the gun body, creating a secure pivot axis that allows the trigger to rotate through its intended range of motion when the operator applies pressure. The precise dimensions and thread specifications of this screw are engineered to provide the correct clearance and tension for reliable trigger operation under the repeated cycling typical of professional spraying applications. When the trigger is actuated, the screw remains stationary while the trigger rotates around it, transmitting mechanical force to the valve stem that controls fluid flow through the gun. Over time, the trigger screw may experience wear from constant friction against the trigger pivot surfaces, corrosion from exposure to coating materials or cleaning solvents, or thread damage from overtightening or cross-threading during reassembly. A worn trigger screw can result in excessive play in the trigger mechanism, leading to a loose or sloppy feel during operation. More critically, a damaged or missing trigger screw can cause the trigger to bind, stick, or become disengaged from the valve mechanism, resulting in inconsistent spray control or complete inability to actuate the gun. Replacing a worn or damaged trigger screw restores the proper mechanical relationship between the trigger and gun body, ensuring smooth, predictable trigger action and reliable spray control.
| Trigger pivot point | Serves as the axle or pivot around which the trigger rotates during actuation} |
|---|---|
| Trigger retention | Secures the trigger assembly to the gun body, preventing disengagement during operation} |
| Mechanical alignment | Maintains proper positioning between trigger and valve stem for consistent spray control} |
| Loose or sloppy trigger | Excessive side-to-side or rotational play in the trigger mechanism} |
|---|---|
| Binding or sticking trigger | Trigger does not move smoothly or returns inconsistently after actuation} |
| Damaged threads | Screw threads are stripped, cross-threaded, or corroded, preventing secure installation} |
| Missing screw | Trigger screw has been lost during disassembly or has backed out during operation} |
Part 550-454 is compatible with the Airless LX-70 Inline Gun. Confirm fitment by verifying the trigger screw matches the original configuration for your specific gun revision.
| Airless LX-70 Inline Gun} | Long trigger screw} |
When replacing the trigger screw or addressing trigger assembly concerns, these components are frequently inspected or replaced at the same time.
The trigger itself may show wear at the pivot points or stress cracks that affect operation and should be inspected.
The spring that returns the trigger to the closed position may lose tension over time, affecting trigger feel and response.
The valve stem that engages with the trigger should be inspected for wear or damage that could affect spray control.
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