Airless DP-6390, Инструкция по эксплуатации

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Painting hydraulic system troubles:
1. If the air motor cycles normally, the exhaust of paintings is not normal.
Please check the painting barrel whether the barrel is empty or not,
and check all the exhaust system and filtering net whether they are
blocked or not. And check whether the V gasket in the painting pump
is loose or worn seriously.
2. After the exhaust valve and the spray gun are closed, the air motor still
cycles due to the following troubles:
a. The V gasket in the painting pump is worn. Please replace the new
sealing.
b. The pump valve, suction valve and exhaust valve are damaged,
please replace the seat ring and the steel ball.
3. If the painting and solvent come out from the lubricant cup, the V
gasket in the pump must be worn seriously and should be replaced.
When replacing the V gasket, please also replace all the gaskets in the
painting pump. Remark: the cowhide gaskets must soaked in the plant
oil completely before the replacement.
4. During the maintenance, all the non-metal gaskets are forbidden to
wash and soak in the strong organic solvent.