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CAT310 pump

Roz

Well-known member
Have two CAT310 pumps with issues.

One comes on as normal at 1300PSI but drops to 600-700PSI when wand handle is pulled. I changed all six valves as they looked worn. Issue did not improve.

Other pump comes on as normal to 1300PSI but drops like the other pump plant pulsates. Checked those valves too but the ones removed looked newish so I probably changed them recently.

Before I remove the head wondering what else to check or remove or replace that could cause the issues. Does not feel like the regulator since pumps come on to expected PSI. Any ideas?

I probably will replace the regulator next.
 
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The first pump could very well be a regulator issue. I'd swap the regulator from a known good regulator if I didn't have spare. The second pump has a seal problem or the head is washed out. Your going to have to pull the head off and inspect the seal seating surface of the head.
 
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