Hi, I have a Cat 390F and when I track some times the left track locks and shutters. Also if I operate the stick in and out it will be normal for 1 cycle and then go slow. if I don't operate a lever for a few seconds and operate again it will do the same. On the screen pump 1 drops cc/rev from 214 to 28. No codes present, pilot system has 600psi full rev. Pump 1 & Pump 2 main relief set at 5000psi all checked. Can anyone help on tis please.
This THREAD related to a problem with similar symptoms on a smaller machine. From memory the final solution was not on anyone's radar.
Hi Nige Serial no HJD10061
Read through that link to Page 2 for what was discovered to be the problem. It may be worth a look.
Based on what I highlighted in red above. I think you should check the electrical part including the wire, connector and even the sensor number 29 itself.