An argument over the weirdest thing...

[caspernz]

Recently I helped a couple of friends with a small mechanical project. It required the use of several hydraulic jacks. I only have a car type trolley jack, so brought it along for the job. Mate rolls jack into position, starts cranking the jack handle right away. Only problem is I leave the release valve cracked open when jack isn't in use. It's normally stored level anyway.

This then led to my two buddies arguing with passion on what the correct way to store a trolley jack is. Release valve open or closed...:clap::brick::crazy::nya: Oh boy, it was akin to reading some of the posts on KB.

Does anyone have any hard and fast rules (or evidence) on what the right way to store a trolley jack is, for all I know the lads are still arguing now :killingme

And yes, I need a better class of friends obviously :rolleyes:

[pete376403]

Well, the bigger floor jacks that have a spring loaded release trigger will normally have the valve in the closed position. OTOH If I've left my small jack valve open, it's because that's where I left it after lowering the jack. Still seems to work ok.

If anyone one takes a position either for or against something, then they ought to be able to come up with valid, logical reasons supporting their argument. If they cant support their argument logically (" cos I said so" doesn't count) then it isn't worth shit.

[AllanB]

Are you running full synthetic oil in that trolley jack?

I always close mine when stored. No idea why or if it's 'correct'

[Akzle]

it's an hydraulic piston. if you left it loaded and under pressure then there's the potential for pressure to bleed past the seal, deforming it and causing a weak/worn spot which will be exacerbated with use. i consider this unlikely though, even on the chinesest of them.

if it's unloaded, there's no issue.

[caspernz]

Well, the bigger floor jacks that have a spring loaded release trigger will normally have the valve in the closed position. OTOH If I've left my small jack valve open, it's because that's where I left it after lowering the jack. Still seems to work ok.

If anyone one takes a position either for or against something, then they ought to be able to come up with valid, logical reasons supporting their argument. If they cant support their argument logically (" cos I said so" doesn't count) then it isn't worth shit.

Oh yes I'm familiar with the big air assisted stuff, with spring loaded release valves, like we use under the trucks. It just amused me how two grown men could argue, not convincing anyone of anything, on such a topic. Oh and no evidence to support either position. Reminds me of someone...:bleh:


Are you running full synthetic oil in that trolley jack?

I always close mine when stored. No idea why or if it's 'correct'

To be honest, the jack is still on its "running in oil" so I've no idea. How many jacking cycles should I go thru before I can change to full synthetic? :devil2: Does it need to be warm when I drain it? :eek::doh:

[ellipsis]

...my heavy old pos has lived outside for thirty plus years, get's used regularly...castors are seized with rust usually, sometimes not if I spend a few minutes with a wire brush a hammer and some CRC, which is just about never...whilst dragging this heavy pos all over our land for years, I have never contemplated this issue ever...I probably wont start now, either...

[caspernz]

it's an hydraulic piston. if you left it loaded and under pressure then there's the potential for pressure to bleed past the seal, deforming it and causing a weak/worn spot which will be exacerbated with use. i consider this unlikely though, even on the chinesest of them.

if it's unloaded, there's no issue.

That's more or less how I saw it. I'd be more concerned with storing a jack raised, to let the ram get dirty/corroded, rather than whether the release valve is open or closed.

[caspernz]

...my heavy old pos has lived outside for thirty plus years, get's used regularly...castors are seized with rust usually, sometimes not if I spend a few minutes with a wire brush a hammer and some CRC, which is just about never...whilst dragging this heavy pos all over our land for years, I have never contemplated this issue ever...I probably wont start now, either...

Me neither, just found it funny that this could cause an argument between two grown ups...:rolleyes::clap:

[Laava]

Those trolley jacks are always under pressure to keep up!

[Akzle]

Those trolley jacks are always under pressure to keep up!

:clap: have to give you that one, gayfok.

[Graystone]

it's an hydraulic piston. if you left it loaded and under pressure then there's the potential for pressure to bleed past the seal, deforming it and causing a weak/worn spot which will be exacerbated with use. i consider this unlikely though, even on the chinesest of them.

if it's unloaded, there's no issue.

It's single action spring return you bell-end, pressure can't build up in that.

The only hard and fast rule with release valves is they must always be properly open, or properly shut.

[Akzle]

It's single action spring return you bell-end, pressure can't build up in that.

The only hard and fast rule with release valves is they must always be properly open, or properly shut.

you're right. it's magic that lifts shit... tiny elves that levitate underneath the//

wait. no. it's a fucken rubber seal inside a cylinder...

[Graystone]

you're right. it's magic that lifts shit... tiny elves that levitate underneath the//

wait. no. it's a fucken rubber seal inside a cylinder...

A rubber seal inside a single action spring return cylinder in which pressure cannot build since it is single action. I think the concept could be dumbed down more to your speed, but grunts and gesturing probably don't convey well over the forums...

[EJK]

Those trolley jacks are always under pressure to keep up!

Dat gummit! You beat me to it again!!!

[GazzaH]

Did they pay for the 15 minute argument (https://youtu.be/kQFKtI6gn9Y)?

[YellowDog]

I was told by a mechanical engineer, many moons ago, that you should store the jack, uncompressed, with the valve closed. When I asked why, he stated that the movement of potential moist air, is your enemy. With the value open, it is subject to a greater degree of atmospheric variables and can suffer consequential wear and corrosion.

I generally forget to do this, but I'm not losing any sleep over it :no:

[neels]

Mine is always stored (as in left wherever it was last used) with the valve open, because that's where it ends up when you let it down.

It does make some logic to leave it down as mentioned above, to keep dirt and rust off the ram, valve open or closed I wouldn't have thought would matter.

Possibly more likely to bugger the release valve seal, whatever it is, and cause it to leak if it's left closed all the time?

[eldog]

Are you running full synthetic oil in that trolley jack?

I always close mine when stored. No idea why or if it's 'correct'

Closed, it will prevent user from grabbing the top of the piston, lifting it and causing oil and air being sucked in as the piston slides out of the cylinder, bypassing the open valve.

[eldog]

it's an hydraulic piston. if you left it loaded and under pressure then there's the potential for pressure to bleed past the seal, deforming it and causing a weak/worn spot which will be exacerbated with use. i consider this unlikely though, even on the chinesest of them.

if it's unloaded, there's no issue.

Generally if the seal will leak then it’s either very badly worn or something has scratched the barrel.

seals leak if overloaded or not designed for purpose. Hi speed and movement over a small distance repetitively like a fork seal is a case.

Seals are mostly of a plastic nature. O rings nitrile rubber. Or Viton or silicon for hi temp.

have seen all sorts of seal failure, mostly due to overloading. Or high pressure sudden decompression.

still prefer locking valve gently when not being used. And breather shut as well in case unit is tipped over causing a leak

[awayatc]

You should ask the big C

Coz she knows jack shit.........

[caspernz]

You should ask the big C

Coz she knows jack shit.........

That prompts a cut'n'paste reply...



For some time many of us have wondered just who is Jack Schitt?

We find ourselves at a loss when someone says,

'You don't know Jack Schitt!'

Well, thanks to my genealogy efforts, you can now respond in an intellectual way.

Jack Schitt is the only son of Awe Schitt.

Awe Schitt, the fertilizer magnate, married O. Schitt, the owner of Needeep N. Schitt, Inc. They had one son, Jack.

In turn, Jack Schitt married Noe Schitt. The deeply religious couple produced six children: Holie Schitt, Giva Schitt, Fulla Schitt, Bull Schitt, and the twins Deep Schitt and Dip Schitt.

Against her parents' objections, Deep Schitt married Dumb Schitt, a high school dropout.

After being married 15 years, Jack and Noe Schitt divorced.

Noe Schitt later married Ted Sherlock, and because her kids were living with them, she wanted to keep her previous name. She was then known as Noe Schitt Sherlock.

Meanwhile, Dip Schitt married Loda Schitt,

And they produced a son with a rather nervous disposition named Chicken Schitt.

Two of the other six chidren, Fulla Schitt and Giva Schitt were inseparable throughout childhood and subsequently married the Happens brothers in a dual ceremony.

The wedding announcement in the newspaper announced the Schitt-Happens nuptials.

The Schitt-Happens children were Dawg, Byrd, and Horse.

Bull Schitt, the prodigal son, left home to tour the world.

He recently returned from Italy with his new Italian bride, Pisa Schitt.

Now when someone says, 'You don't know Jack Schitt,' you can correct them.

Sincerely,
Crock O. Schitt

[awayatc]

That prompts a cut'n'paste reply...



For some time many of us have wondered just who is Jack Schitt?

We find ourselves at a loss when someone says,

'You don't know Jack Schitt!'

Well, thanks to my genealogy efforts, you can now respond in an intellectual way.

Jack Schitt is the only son of Awe Schitt.

Awe Schitt, the fertilizer magnate, married O. Schitt, the owner of Needeep N. Schitt, Inc. They had one son, Jack.

In turn, Jack Schitt married Noe Schitt. The deeply religious couple produced six children: Holie Schitt, Giva Schitt, Fulla Schitt, Bull Schitt, and the twins Deep Schitt and Dip Schitt.

Against her parents' objections, Deep Schitt married Dumb Schitt, a high school dropout.

After being married 15 years, Jack and Noe Schitt divorced.

Noe Schitt later married Ted Sherlock, and because her kids were living with them, she wanted to keep her previous name. She was then known as Noe Schitt Sherlock.

Meanwhile, Dip Schitt married Loda Schitt,

And they produced a son with a rather nervous disposition named Chicken Schitt.

Two of the other six chidren, Fulla Schitt and Giva Schitt were inseparable throughout childhood and subsequently married the Happens brothers in a dual ceremony.

The wedding announcement in the newspaper announced the Schitt-Happens nuptials.

The Schitt-Happens children were Dawg, Byrd, and Horse.

Bull Schitt, the prodigal son, left home to tour the world.

He recently returned from Italy with his new Italian bride, Pisa Schitt.

Now when someone says, 'You don't know Jack Schitt,' you can correct them.

Sincerely,
Crock O. Schitt

Verbal diarrhea. ...aka "Big C" is but a distant cousin.

She couldn't keep up with solid shits

[Moi]

Verbal diarrhea. ...aka "Big C" is but a distant cousin.

She couldn't keep up with solid shits


Must've been the pressure of keeping up... :facepalm: