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We have a Katcher HDS 3.5/30-4 M Ea. Was using it, stopped using it briefly in the middle of a job, pulled trigger again, and there was a lack of pressure. Went to the machine to troubleshoot. The "engine indicator light" is on. Checked the temperature of machine: fine. Water intake: fine. We have not been running it at high temperatures, but about 50 degrees C. The pressure was at about 2300 PSI before it stopped. Any ideas?

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 12 Answers

SOURCE: Pressure is fine when first started ,if trigger released no Psi

Your uplift injector valve in the water pump is sticking. You need to remove this part. Lube the top o-ring only with a water proof grease. Reinstall this part. You will be up and running again.

You need to use needle nose vise grip tool to easily remove the valve. You need to grind down the vise grip tool to fit the opening where the valve is installed.

To prevent this problem from reoccuring use a pump guard additive.

Posted on Apr 06, 2009

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SOURCE: i have a 2300 psi

If you no longer have High Pressure coming out while machine is running, it's a pump issue.

Posted on Mar 19, 2011

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