Tractor tyre pressure

[hally]

Just curious what people think will be the ideal tyre pressure for this outfit. BKT 650 tyres 3ton grass drill and 1ton front

weight alot of roadwork. TIA

 

[e3120]

How slow are you prepared to go on the road? Do you have air brakes?

 

[davidroberts30]

20psi in the rear?

 

[shumungus]

Look up the static load radius for the tyre size and go from there if you haven't a weigh bridge.

 

[jh.]

3 cleats loaded on hard level yard

 

[hally]

How slow are you prepared to go on the road? Do you have air brakes?

Fast as possible and no

 

[DrDunc]

Just curious what people think will be the ideal tyre pressure for this outfit. BKT 650 tyres 3ton grass drill and 1ton frontView attachment 1028950 weight alot of roadwork. TIA

Using Michelin tyre app, with the front and rear weights 2m from the f/r axles(that's a guess from the picture, but don't be far off), a 2.7m wheelbase (think Deere is slightly less), axle weights unladen 3000kg front, 4500kg rear (that's my valtra n134, think Deere more weight on rear)......

..... The results are (drum roll please)

Looks like you'll be holding up road traffic

Edit

You can use the tyre loads calculated by the Michelin tyre app to look up pressure charts for BKTs. Michelin's multibibs aren't renowned as heavy load carrying tyres. The 600s originally fitted to my valtra N weren't even rated to 40kph with he tractor unladen!!!

Stick 2 bar in the rears for the road, and let them down to 1.4 bar in the field, and you'll be grand

 

[hally]

Using Michelin tyre app, with the front and rear weights 2m from the f/r axles(that's a guess from the picture, but don't be far off), a 2.7m wheelbase (think Deere is slightly less), axle weights unladen 3000kg front, 4500kg rear (that's my valtra n134, think Deere more weight on rear)......

..... The results are (drum roll please)

View attachment 1028999

Looks like you'll be holding up road traffic

Edit

You can use the tyre loads calculated by the Michelin tyre app to look up pressure charts for BKTs. Michelin's multibibs aren't renowned as heavy load carrying tyres. The 600s originally fitted to my valtra N weren't even rated to 40kph with he tractor unladen!!!

Stick 2 bar in the rears for the road, and let them down to 1.4 bar in the field, and you'll be grand

We normally run at 2bar but just wanted another opinion. Thanks

 

[Exfarmer]

1 bar is plenty for landwork . We normally ran at .8

 

[DrDunc]

1 bar is plenty for landwork . We normally ran at .8

Only 11.5psi? What brand?

Big tyres on a wee tractor slowly pulling nothing but it's own weight maybe, but without referring to manufacturer load/pressure charts, the heat and excessive flex won't be doing much for their longevity

 

[Exfarmer]

Only 11.5psi? What brand?

Big tyres on a wee tractor slowly pulling nothing but it's own weight maybe, but without referring to manufacturer load/pressure charts, the heat and excessive flex won't be doing much for their longevity

I think soil damage is far more important than tyre wall damage.
would not dream of putting such large machines on a seedbed if you cannot operate on low damage perhaps you should be doubling up on wheels

 

[freelancer]

Is that really 650/65R 38? Looks so small... I use 1,2 bar with a simular drill for many years, but speed limit 30 km/h then. (trelleborg tires)

 

[brentnz]

Is that really 650/65R 38? Looks so small... I use 1,2 bar with a simular drill for many years, but speed limit 30 km/h then. (trelleborg tires)

The tyre to tank clearance makes me think they’re 600/65r38. 650’s barely fit on a 6130r

 

[CPF]

Just curious what people think will be the ideal tyre pressure for this outfit. BKT 650 tyres 3ton grass drill and 1ton frontView attachment 1028950 weight alot of roadwork. TIA

I thought that John Deere would romp along with that drill without a pushing tractor.

 

[Sandy]

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curious what people think will be the ideal tyre pressure for this outfit. BKT 650 tyres 3ton grass drill and 1ton frontView attachment 1028950 weight alot of roadwork. TIA

 

[hally]

The tyre to tank clearance makes me think they’re 600/65r38. 650’s barely fit on a 6130r

No they are 650,s not standard on a 6130

 

[hally]

Pretty standard upgrade around

here