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Follow this guide to disassemble and rebuild a leaky, clogged, or otherwise improperly-working spray gun for the Graco Paint Sprayer, model 17C325.
As you disassemble the spray gun, take the time to clean all the parts with soap, water, and a brush before reassembly, and replace any worn-out parts as needed, which are provided in the gun repair kit (part # 288817).
The filter is not included in the repair kit, but it may be a good idea to clean or replace it during the rebuild process.
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Pull the spray tip straight up and out of its housing near the front of the spray gun.
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Use your fingers to unscrew and remove the nozzle guard.
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Use a 5/16" socket and socket wrench to remove the lock nut securing the end cap on the back of the spray gun.
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Pull the end cap straight off the end of the spray gun.
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Pull the two actuator pins straight out of the spray gun.
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Push up on the trigger guard to unseat it from its clip at the bottom of the handle.
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Use a 5/8" wrench to remove the valve seat from the front of the spray gun.
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Grab the front tip of the gun needle and pull it straight out of the housing.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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if you use this procedure you brake your gun
Hi YURIY,
To help us improve the guide, can you please elaborate what would break? Any specific steps? Any extra detail would help. Thanks!
I can't break the tip loose. The piece that u screw the tip on to. I can't break it loose.
Amazing post. keep sharing
From factory, or after use, they are screwed in incredibaly tight. I coulnd't get the valve seat to budge. I'd avoid using an adjustable wrench since those sometimes come loose and strip the nut. The gun repair kit is about $70-$100. HD sells the entire gun for $150, which includes a 515 tip, orange spray tip guard, and new filter inside. Probably better to buy. Great guide though. If the needle can be cleaned to stop the post-release leak, then its probably OK to keep it. Else new gun may be a better option.
