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310 pulsating on startup

What kind of regulator/unloader are you using? I just had to replace my last 40 year old Cat regulator, I put on a J. E. Adams RE7085 and it’s working fine. https://www.kleen-ritecorp.com/p-17...balanced-regulator-3-8-npt-2000psi-7-gpm.aspx
FWIW I use the SMC version. A little more expensive but lasts at least twice as long, and I've never had one fail catastrophically. I've had the Adams stick fully closed and ruin a pump more than once.
 
FWIW I use the SMC version. A little more expensive but lasts at least twice as long, and I've never had one fail catastrophically. I've had the Adams stick fully closed and ruin a pump more than once.
We have 21 of the RE7085 regulators installed the oldest is about 10 or 12 years old. We've never had a problem with any of them.
 
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