单项选择题

Check value is used to control （）

A.direction of oil flow
B.back pressure of return oil
C.bypass of filter
D.high pressure overflow

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单项选择题

A.Too much sludge accumulated in separator bowl
B.Diameter of gravity disc too large
C.High level tank lack of water
D.Oil input too rapidly

单项选择题

A.Oil temperature too high
B.Diameter of gravity disc too large
C.Oil temperature too low
D.High level tank out of water

单项选择题

A.Oil inlet valve opening too quickly
B.Oil temperature too high
C.Diameter of gravity disc too small
D.Viscosity of oil too low