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Caterpillar Cat Pump Pressure Washer Pump 3SP30G11 Questions & Answers
Coleman Powermate pressure washer.
There may be orings in gun but usually not available as a repair kit. Replace the gun with a 5000 to 6000 psi. You will get a much longer life by over sizing gun. If you like to tinker, you can by orings at Lowes in the plumbing department. Lube the orings with silicone paste (also sold at lowes). Good luck
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