JCB Fastrack 4220 Questions

[Andrew]

Anyone want to hazard a guess what I can let a set of 600/30 BKT tyres down to with a mounted 3m trio only going in the field as it's next to the steading??

Whatever the book says for about 3.1t per tyre.

 

[KB6930]

On the Sumo I would have it like this. Manual on the headland, field cruise in the field.

Yeah that's what I did the last time I had 1 ploughing

 

[jamesfalky]

Anyone want to hazard a guess what I can let a set of 600/30 BKT tyres down to with a mounted 3m trio only going in the field as it's next to the steading??

10-12psi in front and 20-22 in rears if you arent going on the road

 

[jamesfalky]

10-12psi in front and 20-22 in rears if you arent going on the road

maybe a touch more in rears if its an older trio with the large packer as they are a heavy old beast!

Does it have the deck weight on the tractor? The deck weight makes a difference in field, especially when you drop a mounted implement down and lose all the weight off the back wheels, and no more than 900kg on the front, any more it will take all the weight off the back and not pull properly.

 

[Andrew]

Whatever the book says for about 3.1t per tyre.

Just looking in my book 1.2 bar (17psi) would be plenty

EDIT just realised yours is a Trio, ours is a GLS so ignorme me.

 

[KB6930]

maybe a touch more in rears if its an older trio with the large packer as they are a heavy old beast!

Does it have the deck weight on the tractor? The deck weight makes a difference in field, especially when you drop a mounted implement down and lose all the weight off the back wheels, and no more than 900kg on the front, any more it will take all the weight off the back and not pull properly.

No it's the newer trio . No deck weight and I've got 2 front options 500 or 900 ish kgs

 

[jamesfalky]

No it's the newer trio . No deck weight and I've got 2 front options 500 or 900 ish kgs

I would give 500kg a go, you will be surprised how little weight you need on the front!

 

[KB6930]

I would give 500kg a go, you will be surprised how little weight you need on the front!

I remember the first one he gave us when they were first launched I picked it up with no weights and drove to pick them up in another field

 

[KB6930]

People complain about pillars in cabs etc but one thing this has is plenty pipes to hook brackets onto not many demo tractors I could knock up a bracket out of a couple of off cuts of steel and have everything in and away in half an hour. But I suppose if I was working everything through isobus I wouldn't need to bother

 

[Andrew]

People complain about pillars in cabs etc but one thing this has is plenty pipes to hook brackets onto not many demo tractors I could knock up a bracket out of a couple of off cuts of steel and have everything in and away in half an hour. But I suppose if I was working everything through isobus I wouldn't need to bother

You’d still need an Isobus screen, JCB screen isn’t yet.
I don’t like Isobus anyway, everything here has it’s own screen with a 1.5” ram mount. Half dozen mounts round the cab too.

 

[KB6930]

Well I'm surprised it's even moving but with surprisingly not that much slip it's pulling it . Michelin or trelleborg tyres would be better again these bkt are too hard with 17psi they don't look soft but will likely wear better on the road

 

[KB6930]

Has anyone put a 4220 over a weigh bridge I'm looking for specific weight not out the brochure?

 

[ORRA LOON]

Has anyone put a 4220 over a weigh bridge I'm looking for specific weight not out the brochure?

We are meant to having ours weighed today by the tyre man to get the pressure settings for various kit. However he didn’t ring to confirm Friday so don’t know if he will turn up .

 

[KB6930]

We are meant to having ours weighed today by the tyre man to get the pressure settings for various kit. However he didn’t ring to confirm Friday so don’t know if he will turn up .

Now that would be handy to know!!

 

[Andrew]

Has anyone put a 4220 over a weigh bridge I'm looking for specific weight not out the brochure?

8.3t ish for mine, tier 4 fairly high spec on 540s. How accurate are you looking for, as weight will change by 0.25t ish depending on diesel level.
The Tier 5s are heavier too.

 

[Andrew]

Now that would be handy to know!!

Tier 4 with 900kg front weight and 8m trailed Dale drill.
3.1t per tyre front
3.15t per tyre rear

 

[KB6930]

8.3t ish for mine, tier 4 fairly high spec on 540s. How accurate are you looking for, as weight will change by 0.25t ish depending on diesel level.
The Tier 5s are heavier too.

Reasonably accurate against the weight of a 6215r

 

[KB6930]

Is my theory ( probably wrong ) that a jcb being 50 50 distribution on 600 tyres gonna be roughly the same footprint as a conventional tractor on 600 front 650 rear?

I'm not needing the science just if I'm right or wrong .

 

[Andrew]

Is my theory ( probably wrong ) that a jcb being 50 50 distribution on 600 tyres gonna be roughly the same footprint as a conventional tractor on 600 front 650 rear?

I'm not needing the science just if I'm right or wrong .

I would imagine so. A JCB is actually something like 55% on the front axle with nothing on I think so you tend to need less front end weight.

 

[benny6910]

How are people finding the reliability of 4000 fastrac’s? Most you see for sale are around the 3000hr mark and is that around the area where warranty finishes? Do people swap before the warranty runs out as they are afraid to run them out of warranty?