As a matter of fact without the hydraulic fluid the hydraulic floor jacks cannot work.
How to refill the fluid in a floor jack.
If you do spill some make sure to clean it off the jack or the floor.
Replace the hydraulic oil in your floor jack every three years and check the operation of the floor jack each time before using it.
Once you buy a new floor jack you may use it for 2 to 3 years without having to refill the hydraulic oil.
Take the hydraulic fluid and begin to slowly pour the fluid into the funnel so as not to spill any of it on the jack or the floor.
Do not move the floor jack until you have replaced the cap and securely tightened it.
Step 3 fill the fuel.
Step 4 replace the cap.
These are the steps that you should follow anytime that you need to refill the oil.
The hydraulic fluid is compressed inside the floor jack and this forces the pistons to rise and this pushes the saddle to lift your vehicle.
This is will ensure that the oil does not leak from the jack.
Proper operation of your floor jack depends on good maintenance.
The hydraulic oil enhances the overall performance of your floor jack.