Doosan NHP10-425WCU-EU-FX-T3, Руководство по эксплуатации и обслуживанию

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Operating & Maintenance Manual Maintenance
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Compressor Oil Filters
The compressor lubrication and hydraulic oil systems include spin-on, throw away type oil
filters, each with an internal bypass valve. With a clean, new filter element, all of the oil flows
through the full element area, from the outside/inside. As each element becomes
contaminated with dirt, a pressure differential is created in the filter housing between the oil
inlet and outlet ports. As this differential approaches 25 psi (175 kPa), the bypass valve starts
to open, thus permitting a small quantity of oil to bypass the filter. As the contaminants
continue to build up, more and more of the oil bypasses the filter media itself.
This bypass does not provide any filtration but does allow a maximum flow of compressor
lubricating and hydraulic oil to preclude any possible damage from loss of oil. Also the design
of the filter prevents any washing-off of any dirt during oil bypassing.
NOTICE
The oil filter must be replaced every 1000 hours of operation.
To service the oil filters it will first be necessary to shut the unit down. Wipe off any external
dirt and oil from the exterior of the filter to minimize any contamination from entering the
lubrication system. Proceed as follows:
WARNING
!
High pressure air can cause severe injury or death from hot oil and flying
parts. Always relieve pressure before removing caps, plugs, covers or
other parts from pressurized air system.
1. Open the service air valve(s) to ensure that system is relieved of all pressure.
Close the valve(s).
2. Turn the spin-on filter element counterclockwise to remove it from the filter
housing. Inspect the filter element and then discard.
NOTE: If there is any indication of formation of varnishes, shellacs or
lacquers on the oil filter element, it is a warning the compressor
lubricating oil has improper characteristics and should be immediately
changed.
3. Inspect the oil filter head to be sure the gasket was removed with the oil filter
element. Clean the gasket seal area on the oil filter head.
Installing a new oil filter element when the old gasket remains on the oil filter
head will cause an oil leak and can cause property damage.