VEVOR SS-PAC02A Bedienungsanleitung Seite 13

12.Take off the column metal
part, clean all dirt and evenly
apply some silicone oil or engine
oil on inside.
13) Separating the piston and
square metal part. Clean all dirt
and check if any o-rings
damaged.
It is normal if you find the light
gray O-ring disconnected.
14) Cleaning up the dirt inside
square part.
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