Reassemble Needle, Spring, and Diffuser
8:16
11:06
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At 8:16 in
Cleaning A Graco Contractor II Gun. Repair an Airless Spray Gun.
What happens here
Before reassembling the top part of the gun, spray some WD-40 inside the gun body to lubricate it. Drop the needle and seat assembly into the fluid side of the gun, making sure the needle slides into the slots and comes out the tip. Then, drop the spring into place. Screw the back cap (diffuser) onto the gun loosely by hand. While squeezing and holding the trigger, use the 5/8 inch wrench to tighten the diffuser firmly. Release the trigger once it's tight. Check the trigger pull for smooth operation.
Goal: Correctly reassemble the internal components and the fluid side diffuser.
Tools and materials
- 5/8 inch Wrench — To tighten the diffuser
- Diffuser — The fluid side cap
- Graco Contractor II Gun Body Graco — The main part of the gun assembly
- Needle and Seat Assembly Graco — Internal components for paint flow control
- Spring Graco — Part of the trigger mechanism
- WD-40 WD-40 — Lubricating internal components
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