How to Test and Adjust the Main Safety Valve of Caterpillar ExcavatorHow to Test and Adjust the Main Safety Valve of Caterpillar Excavator September 15, 2023September 15, 2023 heavydutydiag 0 Comment How to test and adjust the main safety valve of Caterpillar 320C excavator (1) Park the machine on flat ground... READ MOREREAD MORE