Graco 166938 Helical Spring

Graco 166938 Spring Helical – Genuine Gun Trigger/Needle Return Spring

Compatible Machines

• Graco Spray Gun 206-718 (Series M)
• Graco Spray Gun 207-300 (Series J)
• Graco Spray Gun 207-127 (Series K)
• Other Graco spray guns using the same trigger/needle return spring (confirm via manual)

The Graco 166938 Spring Helical is a genuine compression spring used inside specific Graco spray guns. It supports the trigger-to-needle return function, ensuring smooth operation and proper fluid shutoff. This spring helps maintain trigger responsiveness and internal gun performance.

Key Details

Description

This helical compression spring is installed within the internal needle assembly of compatible Graco spray guns. When the trigger is pulled and released, the spring pushes the needle back to its resting position, ensuring clean shutoff and preventing post-trigger dribble. It is a wear component and should be replaced when trigger response becomes inconsistent or weak.

Benefits

• Smooth and reliable trigger return
• Maintains correct needle seating to prevent leakage
• Restores proper spray-gun functionality
• OEM-grade durability and compatibility

Installation Notes

• Always relieve system pressure before opening the spray gun.
• Remove the guard, tip, trigger screws and needle assembly before accessing the spring.
• Inspect surrounding components such as packings and needle for wear during replacement.
• Use only OEM parts for safety and proper performance.

Frequently Asked Questions