Overheating Problem on a Sand Core Production Machine

Posted on 11/02/2023 by Fluid Power Journal in Figure It Out 0 Comments

By Robert Sheaf, CFPAI/AJPP, CFPE, CFPS, CFPECS, CFPMT, CFPMIP, CFPMMH, CFPMIH, CFPMM, CFC Industrial Training.

Back in 2016, I wrote up a problem on a machine that made sand cores. See the original circuit attached. Everything seemed to be the same other than they had omitted the other circuits that ran a couple small cylinders that were not used any more.

Lately, they started having overheating problems that needed to be corrected. The unit was located on a 300-gal reservoir, and they did not have this problem with overheating until they removed the 2-small cylinders that were plumbed after the check located near the accumulator.

Maintenance felt that the problem was with the main pump relief and solenoid valve #1 so they replaced both valves. This did not fix the problem. Unfortunately, they were not familiar with the Core Squeeze circuit thinking it could be the problem and asked for help.

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Robert Sheaf has more than 45 years troubleshooting, training, and consulting in the fluid power field. Email rjsheaf@cfc-solar.com or visit his website at www.cfcindustrialtraining.com. Visit fluidpowerjournal.com/figure-it-out to view previous problems.