Leaking floor jack

[mikehkang]

Originally Posted by The Radium King

the leaking oil might just be oil escaping from the pressure bleed due to too much air trapped in the unit. if you follow the procedure to bleed the air from it, it may stop. if you don't have the manual, it looks something like this:

- oven the valve you use to drop the jack by one turn and let jack drop to lowers position
- pump 8 times with valve open
- close valve and raise jack to max height
- pump 8 more times
- find the bleed valve and release any build-up air
- drop and test

King,

Can you explain how "too much air trapped" can cause oil to escape or leak?
After I changed the oil and bled the jack, oil did leak at first.
I bled the jack again a few times and now the jack is not leaking oil.
You might have fixed my problem!
However, I can't get my head around how the "too much air trapped" can cause oil to escape. I would be grateful if you or anyone else can explain this for me.

Thank you.

P.S. Do you bleed every time before you use the jack?

[The Radium King]

in my case the oil was leaking out of the bleed valve; there was so much trapped air in the jack that it popped the valve and shot air/oil out. the first time lots of air came out, but now i bleed it fairly regularly. still, ibit of oil continues to seep out of the bleeder.

[jcb986]

A lot of the best jack makers are gone because of the China cheap throw away jacks. Check out Snap-On, maybe they are made here.

[mikehkang]

Originally Posted by jcb986

A lot of the best jack makers are gone because of the China cheap throw away jacks. Check out Snap-On, maybe they are made here.

Thanks jcb.

I searched the Snap-On site and their jacks too are from China.

In fact, you can buy the same 1.5 ton jack I prefer from Amazon for much less than their site.

If you had made in USA jacks before, how long did they last?