we have a Hitachi excavator ex-300 used at a stone mining site. The main purpose of excavator is used for jack hammering. Currently we are changing the hydraulic fluid after 800 working hours. Currently, we are using Total Parco Azolla ZS 46. We have tested the oil sample from lab. Please suggest us that should we shorten or extend our oil changing hours. I am attaching a Lab reports for reference.
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