Outer Limits 4x4 Board

I was just browsing an old 4wd Monthly, and an article mentioned jacking underwater if you're stuck in a creek.

Wouldn't this ruin a hydraulic jack? I'm guessing that as the jack extends some air is sucked in to replace the oil pumped out of the reservoir. If the jack is underwater, won't it suck in water?



Scott

Are they talking about a hi lift jack maybe.

It depends how important the tyre change is I guess?????????

grimbo wrote:Are they talking about a hi lift jack maybe.

Probably what the author was thinking, but it didn't explicitly mention high-lift. I'm still stuffed, as the Paj can only use one under the tow bar - the bull bar has angled bottom surfaces, and no side steps (yet... )

The old screw-type jack would cope, but generally I think they suck!

Cheers,

Scott

I think the hydraulic jacks have an oil return path above the piston, so the piston sits in a continuous loop of oil , with the one way valve and pump being fed the return oil from the top of the piston, and supplying it to the bottom of the piston. I have one of the hydraulic jacks and cannot see any air vent holes.

nah mate, with a hydraulic jack,

if the oil is above the piston, then u have piston bypass, and your jack won't hold your car up,

the reason u can't see a bleed hole, on ya jack is cause the reservoir is the outer case, so the barrel is inside the reservoir, but right at the top or the barrel just under the gland, is a bleed hole.

don't quote me, i rebuild these at work, but i can't see how your jack will suck water in.

A High Lift jack is probably one of the most unsafe and un practical pieces of sh*t you could possibly use , I hate them and i refuse to use one again ..
Cheers
Hey Charger

HEY CHARGER wrote:A High Lift jack is probably one of the most unsafe and un practical pieces of sh*t you could possibly use , I hate them and i refuse to use one again ..
Cheers
Hey Charger

Yes but this is often an advantage offroad - like when you need to move one end of your truck sideways by jacking it up and deliberately pushing the jack over (carefully). I have done this many times.

HEY CHARGER wrote:A High Lift jack is probably one of the most unsafe and un practical pieces of sh*t you could possibly use

Yes but this is often an advantage offroad - like when you need to move one end of your truck sideways by jacking it up and deliberately pushing the jack over (carefully). I have done this many times.

Definitely unsafe (but safe enough if you are careful), and very practical.

ISUZUROVER wrote:

HEY CHARGER wrote:A High Lift jack is probably one of the most unsafe and un practical pieces of sh*t you could possibly use

Yes but this is often an advantage offroad - like when you need to move one end of your truck sideways by jacking it up and deliberately pushing the jack over (carefully). I have done this many times.

I agree, i was driving in soft river sand last thursday and tried to drive over a big log. The weight of the front of the vehicle was taken by the bullbar sitting on the log and the wheels dug themselves down till they were hanging and i was stuck. Got the high lift out lifted the bullbar off the log and reversed off the jack.

Handy piece of equipment if used carefully.

A High Lift jack is probably one of the most unsafe and un practical pieces of sh*t you could possibly use , I hate them and i refuse to use one again ..
Cheers
Hey Charger

No offence intended Hey Charger, but;

This is typical of (many) modern management practices. Get access to something, use it without being fully aware of its risks (and hence not managing them), have a bad experience with it, then disregard it as a valuable tool because it was simply not managed correctly.

I was using my highg lift on the weekend in the garage on a level concrete surface. Jacking the car up it just let go and crashed down putting a huge dent in my bullbar luckily it missed me. I have never trusted them regardless of how thoroughly I know how to operate them. They are just too unpredictable I find

grimbo wrote:I was using my highg lift on the weekend in the garage on a level concrete surface. Jacking the car up it just let go and crashed down putting a huge dent in my bullbar luckily it missed me. I have never trusted them regardless of how thoroughly I know how to operate them. They are just too unpredictable I find

Put the pin of a shackle or a 1/2" bolt through the hole under the the jacking unit as you go up every 6" or so, or if you intend to leave it for any length of time, or have to crawl under the vehicle.

GaryInOz wrote:

grimbo wrote:I was using my highg lift on the weekend in the garage on a level concrete surface. Jacking the car up it just let go and crashed down putting a huge dent in my bullbar luckily it missed me. I have never trusted them regardless of how thoroughly I know how to operate them. They are just too unpredictable I find

Put the pin of a shackle or a 1/2" bolt through the hole under the the jacking unit as you go up every 6" or so, or if you intend to leave it for any length of time, or have to crawl under the vehicle.

I was in the process of jacking the car up and suddenly bang the jack shot out. The car was in gear with the wheels chocked. The springs were chained to the chassis to account for any droop etc.

Grimbo, it sounds like your jack is possessed by an evil spirit which is out to get you!

Have you considered an exorcism?

I NEVER use the HiLift in the Garage - that's what a trolley jack is for
No matter how you setup the hilift - I would NEVER get under a vehicle supported by a Hilift.
Also Grimbo - was it the vehicle that moved or teh HiLift that "gave way" (and I don't mean slipped).
Properly used and if you are EXPECTING problems the Hilift can be a very usefull tool....BUT if you don't show it the utmost respect it can kill you......
I'll keep mine thanks

I agree that , if you have to push the car of the jack for a advantage yes it could be usefull ,
but a jack is not designed to have it pushed over that easy that shows how unstable they are ,
ive used them in bogs , in sand , and yes they have got me out but try doing something simple like changing a tyre whilst watching the piece of sh*t leaning and sliding around.
I will always hate them

Wait till you see my new and improved lifting jack !!
Cheers
Hey Charger