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Hi Gentlemen,

Would kindly like to know hydraulic maintenance checklist,report forms(if any) samples,also how to make the hydraulic maintenance preventive maintenance schedule effective.



Hello everybody:

Do you need anything else?

El que no puede andar, se sienta.



change of the hydraulic filter should be all you need to do... hydraulic systems are generally self cleaning internally due to the filter...

change filter before it bypasses...


The number one rule is cleanliness is godliness in hydraulic systems.

As mentioned above, provided the fluid is clean the system does not require much additional maintenance. The OEM should have provided the required oil cleanliness class for the system. Some thoughts for a checklist:

>Frequent visual inspection of system to inspect for leaks - leaks/breaks in the system provide a vector for contamination.
>Ongoing oil sampling for at least particulate content, TAN, viscosity and water. The period of sampling should be appropriate to the likelihood of contamination and the criticality of the system and should be adjusted as required. Can't really give you a suggestion without knowing your system but around 6 monthly might be a starting point.
>Whether the oil needs to be replaced periodically is not settled. Most equipment OEMs err on the side of caution and recommend periodic replacement. Other thinking is that if the oil is not contaminated, has not overheated, and has the required properties (viscosity) then leave it alone. Apart from the cost changing the oil is an opportunity to introduce contamination.
>Strict adherence to quality and cleanliness when filling. Oil supplied for replenishment will probably not be at the class required. Ideally, it should be passed through a flushing rig prior to entry into the system, or at least struck down through a filter, or a fine 150micron gauze pad. The cleanliness class should be confirmed after filling to ensure it is at the required class, and flushed if not.
>Frequent visual inspection for filter blockage indication, differential pressure, or whatever it uses to determine blockage. If nothing, replace periodically. Again, it is hard to say what is the correct periodicity, but a year is a starting place, the OEM should also provide advice.

This is for the system itself. Otherwise, for the rest of machinery (cylinders, pumps, valve blocks etc) depends on what you have. Can provide advice if you are more specific.

Remember, ultimately the point of maintenance is to minimise the cost of ownership (and meet safety/environmental reqs). The need, type, strategy, frequency, etc of maintenance must be balanced against the indirect and direct costs of failure.

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