Weichai generators are engines that burn diesel for energy release. 1. Strictly purchase parts management, Weichai parts for assembling engines are strictly checked and quality guaranteed. 2. The cleaning lines of the engine body, crankshaft and cylinder head are careful and strict to ensure that the oil passages are not blocked. 3. The body adopts the lost foam casting process, the appearance is smooth and durable. 4.The intake and exhaust system is optimized, and the fuel saving rate is up to 30%. 5. Extend the commissioning time, overload the test, and strictly prevent the occurrence of the three-leakage problem. 6.The diesel engine body is made of acrylic quick-drying paint, with permanent luster and beautiful appearance. 7.Super-power deceleration starter, the new instrument panel waterproof design, durable.1. Close the oil inlet ball valve and open the upper end cover. (The upper end cover of the aluminum alloy type needs to be gently pryed from the side gap with a flat-blade screwdriver) 2. Unscrew the plug wire of the sewage outlet to drain the sewage oil. 3. Loosen the fastening nut on the upper end of the filter element of Weichai generator, the operator wears oil-proof gloves to hold the filter element tightly, and remove 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.Tighten the plug wire of the sewage outlet, cover the upper end cover (pay attention to pad the sealing ring), and fasten the fastening bolts.The machine will enjoy one year warranty or 1000 running hours whichever comes first . During the warranty year if any of the parts broken not by man-made .  We will free charge to replace the new one to you . The warranty will begin after the machine send out we received  the B/L. Payment:  1: T/T and Western Union are accepted 2: 30% deposit before production and 70% balance before shipment 3: All banking charges outside China are on buyers