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Reply to "Which Hydraulic Oil ?"

You need to be very careful with which hydraulic oils are used particularly in off highway mobile fleet equipment. For example, Caterpillar requires the hydraulic oil (generally TO4 style or engine oils) to have a minimum of 900ppm of zinc. Hitachi on the other hand recommend their own product which is a HV style oil especially when under warranty. It may pay to get a lubricant survey done either in house or via your oil supplier which lists all your fleet, compartments and oil types used meeting OEM requirements. This needs to be available for all the site persons. Mobile fleet equipment are generally not very complicated in terms of their requirements - typically 5 or 6 oil types are all that is needed.
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