1. First close the oil inlet valve of the 500kw generator that needs to replace the filter on one side of the filter element, close the oil outlet valve after a few minutes, then unscrew the end cap bolts and open the end cap. 2. Open the drain valve to completely drain the dirty oil to prevent the dirty oil from entering the clean oil chamber when the filter element is replaced. 3. Loosen the fastening nut on the upper end of the filter element of the 500kw generator. The operator wears oil-proof gloves to hold the filter element tightly, and removes the old filter element vertically upward. 4. Replace with a new filter element, pad the upper sealing ring (with its own sealing gasket at the lower end), and tighten the nut. 5. Close the drain valve, cover the upper end cover (pay attention to pad the sealing ring), and fasten the bolts. 4.Open the oil inlet valve first, then open the exhaust valve, close the exhaust valve immediately when the oil comes out of the exhaust valve, and then open the oil outlet valve.1.What's your power of diesel generator? Answer:  We can offer the gasoline,diesel from 20KW to 2000KW.  2.What's your delivery time? Answer:  Generally,we can delivery in 20-30 days after receive the deposit.  3.What's your payment method? Answer:  We accept alibaba online order, T/T bank transfer ,and 30% as the deposit,the balance payment should be paid before shipping.  4.What's your warranty? Answer:  All our products we offer one year warranty or 1000 hours(which one is coming first).  5.What's your MOQ? Answer:We accept the MOQ  is 1 set.