My EX 300-3 has a control lockup up problem that has me. When cold, my rear pump will lockup and I will lose a function. Usually it it one track or a boom up issue. When I turn the machine off and restart, all is back but will happen over and over until the oil warms up and frequency reduces. When this happens, the pump will squeal. and the main line from the pump to control valve, which gets totally pressurized, feels like it if filled with buzzing bees. All of that stops after a restart.
I did previously, replace an o-ring in that regulator to stop a leak and fear I may have started the problem then. Any help with this is greatly appreciated.
Dan
I did previously, replace an o-ring in that regulator to stop a leak and fear I may have started the problem then. Any help with this is greatly appreciated.
Dan
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