Tyre inflation System.

[snipe]

I’m going to meet a guy that does hgv air suspension and those trick bouncing gangsters cars in the next day or two. He is going to see what he can rig up. There is also a company called FLT technology near by who do cutis, I will go see them too.
I was thinking of tapping into the air tank, then having a solenoid valve to allow air to the tyre, then a T connection with a second solenoid valve on the T, this could be opened to reduce pressure. Then further on in the line a pressure sensor. Then all you would need is 2 switches in the cab and a pressure gauge. Just need to find the correct rotary coupler for the wheels.

 

[Tractor Boy]

I’m not sure I get the necessity of these flash on the move inflation systems. Surely if the tractor has a compressor on it why not let the tyres down as you enter the field and pump back up when you leave to go on the road with a long hose reel?
What is the need to be able to do it on the move whilst working when it either means expensive rotary valves, or ugly pipe work that can be snagged attached to the mudguards.

 

[Cab-over Pete]

I wouldn’t want either, so I’m trying to keep the best bits and bypass the bad bits

 

[Blue.]

I’m going to meet a guy that does hgv air suspension and those trick bouncing gangsters cars in the next day or two. He is going to see what he can rig up. There is also a company called FLT technology near by who do cutis, I will go see them too.
I was thinking of tapping into the air tank, then having a solenoid valve to allow air to the tyre, then a T connection with a second solenoid valve on the T, this could be opened to reduce pressure. Then further on in the line a pressure sensor. Then all you would need is 2 switches in the cab and a pressure gauge. Just need to find the correct rotary coupler for the wheels.

The rotary glands are expensive.

Rotary Union,Shaft Mounted 1/4 Bsp Thread Rotoflux 3,500 Rpm Max Vacuum or Air | eBay

Made by Rotoflux. 1/4 Bsp Right Hand Thread. BSP THREAD DATA. Shaft Mounted Rotary Union. for use with Compressed Air or Vacuum, Oil & Water. 3,500 Rpm Max. Thread Size. 10 Bar Max.

www.ebay.co.uk

 

[snipe]

I’m not sure I get the necessity of these flash on the move inflation systems. Surely if the tractor has a compressor on it why not let the tyres down as you enter the field and pump back up when you leave to go on the road with a long hose reel?
What is the need to be able to do it on the move whilst working when it either means expensive rotary valves, or ugly pipe work that can be snagged attached to the mudguards.

If you were spreading fert or combi drilling or spraying every time you went on the road to fill up it would take 10mins or more the blow just the back tyres up, we could be doing this over 10times a day. Not practical to keeps stopping to let pressures up and down so many times in a day.

 

[snipe]

Some system Iv looked at have a self closing tyre valve so when the system is not in use the rotary coupling can depressurise. Anyone know how these valves work when lowering pressure. Some have a single line some a second smaller line

 

[Cab-over Pete]

We had the Teleflow wheel valve apart. It has a single line to it.
We think to let air out the control box creates a vacuum, but the air doesn’t go all the way back to the control box, it is vented by the wheel. There is a diaphragm contained within the wheel valve which opens to let the air out.

 

[Tractor Boy]

If you were spreading fert or combi drilling or spraying every time you went on the road to fill up it would take 10mins or more the blow just the back tyres up, we could be doing this over 10times a day. Not practical to keeps stopping to let pressures up and down so many times in a day.

But surely it’s the same compressor on the tractor, so it won’t be hardly any quicker to press a button in the cab to raise all the pressures from say 8psi to 20 to go on the road than just going round doing each one separately with a hose reel. Or am I missing something?

 

[ih1455xl]

Found this web site as the have parts and kits if you can read German

Reifenregler Einzelmodule + Ersatzteile

steuerungstechnik-stg.de

 

[Cab-over Pete]

But surely it’s the same compressor on the tractor, so it won’t be hardly any quicker to press a button in the cab to raise all the pressures from say 8psi to 20 to go on the road than just going round doing each one separately with a hose reel. Or am I missing something?

You need a fair reservoir and I guess tyres go down quicker than inflating.

 

[cvx175]

But surely it’s the same compressor on the tractor, so it won’t be hardly any quicker to press a button in the cab to raise all the pressures from say 8psi to 20 to go on the road than just going round doing each one separately with a hose reel. Or am I missing something?

Missing the fact that you are inflating them as you're driving. If you're pulling a slurry tanker then stopping at the gate to drop and raise pressures would slow work rates massively

 

[Tractor Boy]

Missing the fact that you are inflating them as you're driving. If you're pulling a slurry tanker then stopping at the gate to drop and raise pressures would slow work rates massively

Oh I suppose I can see what you mean. You start to drop the pressures just before getting to the field, and then start to raise again just as you pull out and set of. I can see the advantage on jobs where you are coming and going a lot. On jobs where you are several hours on the field before moving off I can’t see the need.

 

[Jungle Bill]

I saw a good setup on a Deutz in Germany this week, it didn’t look factory fitted, the owner said it paid for itself in 2 years with increased work rates, decreased fuel and tyre costs.

 

[puntabrava]

We have this system on one of our Unimogs. It has a demount sprayer on its back. It is a factory fitted option, front and rear tyre pressures are independently altered by in Cab controls. The difference when travelling in field is unbelievable even on its 24" tyres. You can visibly see the difference in the tyre marks on the ground.

I had that in 1994 on a unimog , then fendt came along 15 years later and announced it as ground breaking.

 

[Speedstar]

I had that in 1994 on a unimog , then fendt came along 15 years later and announced it as ground breaking.

Have you got it on most of your fendt tractors ?

 

[puntabrava]

Have you got it on most of your fendt tractors ?

No, it’s on that 1050 but in reality it should be standard fitment on any tractor over 300 hp.

 

[snipe]

We had the Teleflow wheel valve apart. It has a single line to it.
We think to let air out the control box creates a vacuum, but the air doesn’t go all the way back to the control box, it is vented by the wheel. There is a diaphragm contained within the wheel valve which opens to let the air out.

I was thinking of using these valves but with my own simple system of opening and closing the pressure line. I feared it would need a fancy Controled box.

 

[Cab-over Pete]

That’s what I thought, but those valves do need a fancy controller.

I am getting four blocks machined at the moment. They will channel the air in and out of the tyre, making the connection between the axle and the tyre valve. There will be no valve or any moving parts contained within them, they are just to replace the original valves. There will be a manually operated ball valve between each of them and the valve on the wheel rim so I can fully isolate the whole system, making it very safe.

That manual element won’t suit everyone but will be fine for my situation.

 

[Norfolk Olly]

Can you take a picture of the valve on the wheel

 

[Rs chunk]

Maybe me and a stupid idea but up here in north of Scotland there’s a lot of woof being moved about on arrival lorries to various processing plants I’m always curious what’s happening to the tyre inflation kits off them when the lorries get changed for new or head off for export. There must be used kits about as plenty lorries have it fitted. I always thought a fella could easy adapt one to fit on a tractor?