Why is it so??

[disco_goose]

Over the past months been watching the work progress on the pacific hwy upgade and one thing i have seen im not so sure about.
Graders....why do and what are the benefits of the front wheels being able to "tilt" (insert correct term)??
Cheers goose

[p38arover]

Ask LandyAndy. He drives one.

[wrinklearthur]

Ask LandyAndy. He drives one.

x2


The Graders steering wheels tilt to counter the side draught forces, when the blade is pushing to the side. ----- I think it's a bit like laying a motorbike into a corner !

http://www.aulro.com/afvb/attachment.php?attachmentid=60613&stc=1&d=1368797988

On a mouldboard plough, the land slide plate or furrow wheel does much the same sort of job.
http://www.aulro.com/afvb/attachment.php?attachmentid=60612&stc=1&d=1368797506

The land slide is seen in this picture and that wheel is a depth wheel not a furrow wheel

http://www.aulro.com/afvb/attachment.php?attachmentid=60614&stc=1&d=1368798538
.

[digger]

I thought this was a Professor Julius Sumner Miller thing!!

Julius Sumner Miller - Why Is It So? - YouTube

Cadbury Commercial : Julius Sumner Miller - YouTube


But you know what? I'm glad someone asked because Ive always wondered!

:)

[Mick_Marsh]

I've met the Prof.
Very nice fellow he was. He signed a block of chocolate for me.
I asked him, "Once you've got the egg in the bottle, how do you get it out?"

[UncleHo]

Well! what was his answer?

[wrinklearthur]

How does a cyclone work?
.

[digger]

I've met the Prof.
Very nice fellow he was. He signed a block of chocolate for me.
I asked him, "Once you've got the egg in the bottle, how do you get it out?"

when I was a kid I was a milk runner for the local milky,
nothing made your heart drop more than arriving across the lawn to the front door and finding a bottle with a bloody egg in it...but they also had bits of burnt paper, some had soot, some had raw egg (what the hell where they trying?) and they all had to be cleaned before the depot would accept them. (we used coat hangers to mash the egg and pressure to wash it out)

I hated that ad for so long!!!:twisted:

and it played and played and played.......:o


Apparently this contributed to the removal of bottles and going to cartons in SA (and probably other states too!)

[Mudguard]

Over the past months been watching the work progress on the pacific hwy upgade and one thing i have seen im not so sure about.
Graders....why do and what are the benefits of the front wheels being able to "tilt" (insert correct term)??
Cheers goose

as Wrinklearthure said the 'lean' or angle on the front wheels is to compensate for the side force from the blade.

In the hands of a 'final trim' operator they are a awesome to watch.

[Gary S11]

Another answer to the original question is, it also greatly reduces your turning circle when you lean them over...Gary

[Pedro_The_Swift]

big tyres!:o

[Reads90]

As another person who has travels around qld a far bit. And you are right there is lots of road works at the moment. Last week went from Brisbane to Roma to longreach to Emerald to Rockhampton to Gladstone to Bunderburg and back to Brisbane. And on every road there was loads of road works.

But one question on road works

What do the big steam roller looking style trucks but with the spikes instead of flat actually do.

[42rangie]

As another person who has travels around qld a far bit. And you are right there is lots of road works at the moment. Last week went from Brisbane to Roma to longreach to Emerald to Rockhampton to Gladstone to Bunderburg and back to Brisbane. And on every road there was loads of road works.

But one question on road works

What do the big steam roller looking style trucks but with the spikes instead of flat actually do.

Over here we call them "sheeps' foot tampers." The spikes concentrates the weight of the roller, increasing the compression of the fill before the next layer of fill is put on top. Makes for a more stable build up of earth.

Les

[Reads90]

Over here we call them "sheeps' foot tampers." The spikes concentrates the weight of the roller, increasing the compression of the fill before the next layer of fill is put on top. Makes for a more stable build up of earth.

Les

Thanks

[Pedro_The_Swift]

or "pad" foot rollers,,

[42rangie]

or "pad" foot rollers,,

Ah! The similarities and the differences. Love it!

Les

[lane]

So who has worked out how to apply the same principles to our Discos?:D

[42rangie]

So who has worked out how to apply the same principles to our Discos?:D

This kind of setup?

[LandyAndy]

It seems Im qualified to answer both questions about roadworks as its what they chuck money at me to fill my day in.
Grader wheel lean,as somebody mentioned,it helps counter the force of the load the mulboard is mooving,we lean the wheels over opposite to the way they want to slip.Gary,leaning the wheels whilst turning only marginally helps the turning circle,on a "lever" operated machine you run out of hands;););););),can be used on a joystick operated machine like mine as its a thumb movement to do so.To reduce turning circle we articulale the machine.

https://www.aulro.com/afvb/images/imported/2014/09/806.jpg (http://s113.photobucket.com/user/LandyAndy_2006/media/002-117.jpg.html)


Padfoot/Sheepfoot rollers.They are used when compacting materials with a high clay content.

Hope this helps.
Andrew

[Gary S11]

Ah Andy the luxury of modern machines, the cat 12 Es I did my time on, no articulation, wrist breaking dog clutch levers, stinking hot smelly things, the good old days not...I used to be able to drive these things, but no way could I operate one, unless you wanted a bmx track " which of course weren't around then we had dragsters" I as a then mechanic I take my hat off to you operators, a real skill ...Gary

[Bigbjorn]

Over here we call them "sheeps' foot tampers." The spikes concentrates the weight of the roller, increasing the compression of the fill before the next layer of fill is put on top. Makes for a more stable build up of earth.

Les

There are sheeps foot rollers and pad foot rollers. Sheeps foot are drawn and pad foot can be drawn or self-propelled. A sheeps foot is a small circle of steel on the end of a pedestal and a pad foot is a rectangle of steel. Pad foot are usually (almost always) vibrating, and sheeps foot always static. Both are used for compacting heavy clay or puggy fill and should not be used for any other purpose. However poverty stricken or lousy contractors being what they are, machines are frequently used incorrectly simply because it is what they have and won't or can't pay to have the right machine on the job. False economy if the site engineer declares the compaction not the required standard and orders it all ripped out and done again properly this time.

[trog]

why do super market trolleys have the 4 wheel steering? On a perfectly flat surface they are bearable but in the sloped car parks they become pigs. No wonder so many cars are dented and scratched !.

[Dougal]

why do super market trolleys have the 4 wheel steering? On a perfectly flat surface they are bearable but in the sloped car parks they become pigs. No wonder so many cars are dented and scratched !.

That really ****ed me off when I was in Aussie years ago. Especially trying to hold them straight going across a ramp.

The supermarket trolleys in NZ have had locked straight rear wheels for at least 20 years now. It cost the more to buy 4 swivelling wheels than 2 swivelling and 2 locked.:(