... 1,Prop up 2,Oil filter 3,Switch 4,Plunger punp5,Oil in put 6,Oil tank 7,Oil tank ... of the oil input to let air in and out;(3)Tighten the switch before you are to bend the tube ... pump to press to an angle desired;(6)Release the switch in counter clockwise and the functioning rod will be back ... tubes.a. Check if the steel ball in the switch is lost, then tighten the switch clockwise.b. Check if the oil ...