Oil contamination could also be one of the reasons.
Change floor jack oil.
You should also monitor the overall performance of the floor jack before replacing the oil.
The piston will rise to its optimal height when the fluid is at full capacity.
In this case turn the jack upside down and drain the contaminated oil fill the jack with the new oil up to the required level.
In most cases manufacturers suggest that the hydraulic oil should be refilled periodically.
How to change the oil in either your floor jack or bottle jack.
Close the fluid release valve by turning it clockwise one half turn or until it is snug.
Put the jack in the down position by opening the release valve the valve that when opened allows oil to flow back into the main oil reservoir located at the bottom of the jack thus lowering the ram piston.
This lifting device pumps fluid from one chamber to another which forces a piston to rise.
This step will continue until all the required new oil gets injected.
Once the jack is lowered locate the oil filler port which is on the bottom of the jack s reservoir near the flat base.
Be that as it may it is advisable to keep checking the condition of the oil.
A floor jack is used to lift heavy objects.
Add oil to the oil filler hole using a small funnel.
Oil plug closing as the third step get finalized you need to put oil plug back on a floor jack.
As we connect it with a floor jack it starts to inject gradually.
Firstly if the hydraulic floor jack is not lifting properly then the oil level is required to be checked.
Set the jack right side up on its casters.
The oil in the floor jack should be replaced every 3 years.
Hydraulic oil dispenser will help to pump new oil into the floor jack.
Place the floor jack on a hard level surface.
How to change the oil in either your floor jack or bottle jack.