To fix a floor jack that leaks down firstly check the reservoir from the level of oil in it.
Floor jack oil level.
Place the floor jack on a hard level surface.
Step 4 place the small end of a clean plastic funnel into the oil filler opening hole.
After the rubber plug is removed you ll be able to see the hydraulic oil level.
Press the jack downward.
If the oil is below this level high quality jack oil must be added.
I could see that the reservoir in my jack was nearly empty which explains its inability to lift a vehicle.
If the problem is not solved after these steps then the pressure valve needed to be repaired.
You should make sure that your oil is poured to this level.
Hydraulic jack oil 8.
Look for any oil seepage around this valve.
Return the fluid release valve to its original position by turning it a half turn in a clockwise direction.
The funnel should prevent any unnecessary spills when refilling the oil.
Slowly pour in oil.
Every floor jack will have the required level of the hydraulic fluid indicated.
Lift the arm and release it slowly it will lead to pushing the air out.
Place your foot on the jack.
Use the jack handle to turn the valve a half turn in a counterclockwise direction.
The hydraulic jack oil should be visible 3 16 inch above the inner cylinder wall.
Only start pouring the oil when the funnel is in place.
Sometimes more oil could be the reason for leak down.
Filling jack oil reservoir.