Self Built Central Tyre Inflation System

Pheasant Surprise · May 11, 2018

Mursal said:
And stuff stuck to the tyre sidewall gets scraped off with the lifeline?
Not sure about that ............

Not sure what the wheel and axle arrangement is like, but potentially could use a ‘slip ring’ style coupling around the axle itself, but probably need to be bespoke if possible to suit the axle. ££££ for a one off

Mursal · May 11, 2018

It seems most use an electric valve to open before the compressor starts inflating, so if the line gets whipped off the valve automatically closes leaving the tyre as it is, rather than flat. Also possibly a pressure sensor feedback. But does it not look delicate sitting out there.

Mursal · May 11, 2018

Pheasant Surprise said:
if possible to suit the axle. ££££ for a one off

Yes no easy answers ...........
Rechargeable compressor mounted in the wheel with remote control, but that just dreaming?
Especially for the volume of air involved ...............

Mursal · May 11, 2018

Unless Pete would be open to connecting an air line from each back wheel while he loads up the trailer. Set the regulator to road pressure so it cuts out automatically. Quick coupling on both wheel and spreader chassis. Disconnect when the compressor stops (pressure reached if using the engine compressor) and away you go ...........
Then letting the tyres down accurately would be the only obstacle, maybe plug a digital gauge into the wheel quick coupling and open the tap?

Pilgrimmick · May 11, 2018

Would it not be easier to mount a bottle/resevoir on the tractor and recharge it from a compressor when back at the yard?

Pheasant Surprise · May 11, 2018

Mursal said:
Yes no easy answers ...........
Rechargeable compressor mounted in the wheel with remote control, but that just dreaming?
Especially for the volume of air involved ...............

Pilgrimmick said:
Would it not be easier to mount a bottle/resevoir on the tractor and recharge it from a compressor when back at the yard?

Don’t think you’d have the required air volume with either of those solutions.

I’ve got one of those handheld rechargeable compressors in the boot of the car and that is pretty slow on a car tyre, hate to think how long you’d be waiting for a tractor tyre to fill up.

A bottle/reservoir would either need to be massive, or be under huge pressure. I don’t think a standard 7.5/10bar vessel would have enough puff for all 4 big tyres.

Steevo · May 11, 2018

Pheasant Surprise said:
Don’t think you’d have the required air volume with either of those solutions.

I’ve got one of those handheld rechargeable compressors in the boot of the car and that is pretty slow on a car tyre, hate to think how long you’d be waiting for a tractor tyre to fill up.

A bottle/reservoir would either need to be massive, or be under huge pressure. I don’t think a standard 7.5/10bar vessel would have enough puff for all 4 big tyres.

Think you’d burn a compressor out pretty quick too. They aren’t built for running for half an hour straight.

Pheasant Surprise · May 11, 2018

Steevo said:
Think you’d burn a compressor out pretty quick too. They aren’t built for running for half an hour straight.

Yeh they’re little ‘oil-less’ units and get stonkingly hot after a short while.

Pilgrimmick · May 11, 2018

Pheasant Surprise said:
Don’t think you’d have the required air volume with either of those solutions.

I’ve got one of those handheld rechargeable compressors in the boot of the car and that is pretty slow on a car tyre, hate to think how long you’d be waiting for a tractor tyre to fill up.

A bottle/reservoir would either need to be massive, or be under huge pressure. I don’t think a standard 7.5/10bar vessel would have enough puff for all 4 big tyres.

Thinking more of a diving type bottle 200 Bar!

davedb · May 11, 2018

Mursal said:
Unless Pete would be open to connecting an air line from each back wheel while he loads up the trailer. Set the regulator to road pressure so it cuts out automatically. Quick coupling on both wheel and spreader chassis. Disconnect when the compressor stops (pressure reached if using the engine compressor) and away you go ...........
Then letting the tyres down accurately would be the only obstacle, maybe plug a digital gauge into the wheel quick coupling and open the tap?

This would be a good compromise I’d think you could connect up the air lines while you load the loadall on the trailer, have a pressure reg so it shuts off when up to pressure then disconnect and head to the next job, obviously this wouldn’t be any good if you had to load lime in a yard and travel to spread it you’d be going a lot of changing pressures then

Cab-over Pete · May 11, 2018

Ok, you’re all making my brain hurt now!!

Good stuff though, thank you.

davedb · May 11, 2018

Cab-over Pete said:
Ok, you’re all making my brain hurt now!!

Good stuff though, thank you.

Do you often travel anywhere loaded? Or are you spreading mostly feild heaps and not needing to travel loaded at high speed?

ROBINWORKS · May 11, 2018

One of these might help, be of use for the automatic inflate deflate of the tyres.
https://www.pcl-online.com/qube-tyre-inflator-379-p.asp

Pheasant Surprise · May 11, 2018

Cab-over Pete said:
Ok, you’re all making my brain hurt now!!

Good stuff though, thank you.

Interesting thread

Cab-over Pete · May 11, 2018

davedb said:
Do you often travel anywhere loaded? Or are you spreading mostly feild heaps and not needing to travel loaded at high speed?

Hardly ever travel on the road loaded but nearly always pull the trailer with the Loadall on.

The odd time I do take a load down the road it’s never far so can take it steady. Farm tracks and roads are a regular trek though.

I may be fussing over nothing (I do that!) and that’s why I’m not willing to pay £5000+ for a system. If I can do it for half that it might be a goer.

Mursal · May 11, 2018

Do you want it push button in the cab or are you willing to compromise to keep it Cheap Simple and Durable?

ROBINWORKS · May 11, 2018

Unimog used to fit these as an option

Pheasant Surprise · May 11, 2018

ROBINWORKS said:
Unimog used to fit these as an option

The mogs are designed around their CTI system, rather than it being added as an afterthought. You’d hardly know it was there it’s well integrated. Pressurised axles and boxes for wading etc. Clever stuff.

Cab-over Pete · May 12, 2018

Mursal said:
Do you want it push button in the cab or are you willing to compromise to keep it Cheap Simple and Durable?

No, I’m not after electronic stuff at all. As I see it, all I need is two pressure choices for field and road. A simple flick of a manual valve can do that. Pressure gauge could even be mounted outside the cab as long as it’s in view. There need be no preset options either. If the gauge is in view it could all just be switched to inflate or deflate.

The only thing it would need is a way to set a maximum and minimum pressure for the inevitable times you occasionally forget! Nobody wants a tyre bursting off the rim!

Gerbert · May 12, 2018

I saw an article about a farmer that made airtanks in the rims of his tractor. A big ass ball valve between the tank and the wheel and a pressuremeter on the wheel and you inflate the tyre in seconds. He just fitted a small airline to the tank to to keep it topped up, as the topping up doesn't need to go all that fast he could suffice with the airbrake compressor in stead of needing a a huge and expensive one.

Self Built Central Tyre Inflation System

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