The Demo Thread

holywell farmer · Dec 17, 2021

Pr

Farma Parma said:
afaik the main reason it got dropped they couldnt make it do 50k but yeah agree totally it was brilliant trans esp in later 6200 series form

Probably why jd kept auto quad box longer because that can reach 50k,
Was there no way to get dynashift to 50k then?

Farma Parma · Dec 17, 2021

holywell farmer said:
Pr

Probably why jd kept auto quad box longer because that can reach 50k,
Was there no way to get dynashift to 50k then?

Mustn't have been, you could still get early Tier2 6400 with that trans but it was always a 40k max box even flatoot.
Pleased you don't have to run tractors at full revs on the road anymore mind.
None of mine here are much above 2000 revs these days.
Folks ranted on about 6290s being this n that & yes they sounded nice under load, ploughing or cultivating at the right revs yes.
but not flat-out on the road they didn't that DING at 2400revs did nowt for me.
The 6180 wasn't as harsh a sound flat-out.
D6 tootling about is so different hardly any revs at all
Dyna-VT is such a diff experience tho you stuggle to go back to any sort or geared/powershift trans after.

Farma Parma · Dec 17, 2021

holywell farmer said:
Pr

Probably why jd kept auto quad box longer because that can reach 50k,
Was there no way to get dynashift to 50k then?

wasnt Deeres 40k Powerquad faster anyways didn they do about 28mph whatever that is in KPH which was faster than most other 40k tractors at the time.

Farma Parma · Dec 17, 2021

Frankzy said:
What is wearing thin is the insane claims of an actual miracle being taken as truth even when there's not a shred of evidence or supporting facts.

I'll try to lay out the problem in the most basic form..
When propelling a tractor (and trailer) at a certain speed our engine has to produce A: the required revs, and B: the required power.
If we increase the gear ratio so the required revs drop from ~1500 to something like 1000 rpm we still have to provide the exact same amount of power. And as everyone who's ever seen an engine graph will know, combustion engines does not like working at very low revs so the engine becomes worse with fuel, not better.

Look at the line for g/kwh and ask yourself if it is physically possible for a tractor that normally does something like 30 l/100km at 1500 rpm to then drop its revs to 1000 and suddenly only use 8 l/100km?
View attachment 1003580

Engines deffo dont like ticking over for long periods there far better under some load & bit more revs.
I know on my TDI car which is a manual 6speed think it does 60mph at 1600revs & lets say ave 55/58mpg easily on a run ok
u wonder if it had a 7th gear & lost 200/300revs would it gain much fuel saving? maybes not as its poss at its most efficient already?
so i dont disagree with your info above

Chae1 · Dec 17, 2021

Farma Parma said:
Engines deffo dont like ticking over for long periods there far better under some load & bit more revs.
I know on my TDI car which is a manual 6speed think it does 60mph at 1600revs & lets say ave 55/58mpg easily on a run ok
u wonder if it had a 7th gear & lost 200/300revs would it gain much fuel saving? maybes not as its poss at its most efficient already?
so i dont disagree with your info above

I agree. My autocommand NH ploughs at pretty much idle all day long. Around 1000,1100 rpm. I think it must be putting massive strain on engine, transmission.

It's done 4.5k hours now and no trouble from engine or transmission yet....

I wouldn't say it's particularly fuel efficient. Sits around 20l/hour. 40% engine load.

Will 1594 · Dec 17, 2021

stevedave said:
I must be one of the only people who doesn't get the fuss over the 30 series JD. We demoed a 6930 stepless and thought it was way over priced and used too much fuel, the cab was small and when it came to reliability it just wasn't at the races. when we looked to change we didn't even consider a JD. Then the 6r came out we tried one of them and I really liked it. The price was a bit too keen and after the horrendous 30 series engine problems it put us off but we told the dealer if they still did the 30 series we wouldn't have entertained ademo.

and what are making mega money now any late 30 series , getting wild prices now
the cab is still a pleasant place for a full day ,
yes you have a big numb gearstick and pull a lever for spools , ,
but 31000 hours between theee here and i think appreciation has over took running costs
they will do 500 ish hours each a year and cost minimal , one had seals in 4 ed drop box 700£ , other idler pulley on fan belt

and other is having a seat refurb £700 from thomas scott’s , apart from service , they will stay
sprayer one i want 20000 hrs out of it
r series , mine had had nothing in 5100 hrs
other what wheel barrow used has had more issues than all rest put together , but wheel barrow been scrapped now

Will 1594 · Dec 17, 2021

puntabrava said:
I’m not getting involved
I didn’t post to the original thread either.

it’s pantomime season remember punts

Iben · Dec 17, 2021

Chae1 said:
I agree. My autocommand NH ploughs at pretty much idle all day long. Around 1000,1100 rpm. I think it must be putting massive strain on engine, transmission.

It's done 4.5k hours now and no trouble from engine or transmission yet....

I wouldn't say it's particularly fuel efficient. Sits around 20l/hour. 40% engine load.

Can you not set min revs? Or push hand throttle forward a little to see if it makes any difference?

Chae1 · Dec 17, 2021

Iben said:
Can you not set min revs? Or push hand throttle forward a little to see if it makes any difference?

I could push the hand throttle forward a bit.

Kind of defeats purpose of a vario though? I would plough at around 1700rpm with powershift gearbox.

If tractors struggling it senses it and gives it more revs.

Someone told me there were 20 new Hollands in getting fixed at a dealership in the Borders. You'll never guess who!

KB6930 · Dec 17, 2021

Chae1 said:
I could push the hand throttle forward a bit.

Kind of defeats purpose of a vario though? I would plough at around 1700rpm with powershift gearbox.

If tractors struggling it senses it and gives it more revs.

Someone told me there were 20 new Hollands in getting fixed at a dealership in the Borders. You'll never guess who!

The auto command do like to run at low revs they're far happier than the powershift versions cultivating like that . The last t7 250 I had on demo was a geared one and you had to be quick getting changed down a gear or it just stalled I had an auto command on a 12 leg Amazone cultivator once and it played with it at 1400 rpm .

The workshop full of tractors probably isn't far off the truth but it covers a very large area !!

fieldfarmer · Dec 17, 2021

Chae1 said:
I agree. My autocommand NH ploughs at pretty much idle all day long. Around 1000,1100 rpm. I think it must be putting massive strain on engine, transmission.

It's done 4.5k hours now and no trouble from engine or transmission yet....

I wouldn't say it's particularly fuel efficient. Sits around 20l/hour. 40% engine load.

Is this the mapped one that was out pulling that john deere ploughing? And has it been on the dyno yet?

Blue. · Dec 17, 2021

I was delighted that my 724 does a mile to the gallon more than my old 720,a fantastic 6.1mpg.

Credit where credits due my 724 is far better on fuel all round that the 720.

Daniel · Dec 17, 2021

eulb said:
I was delighted that my 724 does a mile to the gallon more than my old 720,a fantastic 6.1mpg.

Credit where credits due my 724 is far better on fuel all round that the 720.

That’s interesting, because it gets up to speed quicker on haulage work?

ollie989898 · Dec 17, 2021

eulb said:
I was delighted that my 724 does a mile to the gallon more than my old 720,a fantastic 6.1mpg.

Credit where credits due my 724 is far better on fuel all round that the 720.

What sort of engine revs does it sit at on the road when 'cruising'? I've always felt the main benefit of a 50kph box is that you could go 40kph and have less noise in the cabin.

Farma Parma · Dec 17, 2021

Chae1 said:
I agree. My autocommand NH ploughs at pretty much idle all day long. Around 1000,1100 rpm. I think it must be putting massive strain on engine, transmission.

It's done 4.5k hours now and no trouble from engine or transmission yet....

I wouldn't say it's particularly fuel efficient. Sits around 20l/hour. 40% engine load.

You must have the garden of eden to plough up north coz if i have the 5fr kv at 9" deep which is all the time on the heavy stuff its more than 40% load poss double that. on 240hp 7499
which is well incharge of that plough.
Put it this way the 6480 really struggles thats why the 5fr is never on that now.
and thats at anywhere between 1400-1650revs all depends on how easy going it is.
There in noway am running engines ploughing at 1100revs when all its torque is in that range ive just mentioned.
light land yeah maybes less revs but even my light ish land here isnt that light.
doesnt save any fuel when its load drops off anyways as the engine just lessens the fuel load accordinly
i proved that when rolling trying DTM on/off on the other Dyna-vt there was nowt in it.
Fuel use dropped when going down slope in field just the same running at set revs in this case it was around 1300 as it did when letting the tractors so called cleverer brain (DTM)
be incharge. heading back up it lifted the revs back to nearer 1300 anyways.

Farma Parma · Dec 17, 2021

ollie989898 said:
What sort of engine revs does it sit at on the road when 'cruising'? I've always felt the main benefit of a 50kph box is that you could go 40kph and have less noise in the cabin.

Its massey cousin sits at around 1450revs for 45kph or 1700 for 53/54kph
iam quite happy running all mine at 45kph

Speedstar · Dec 17, 2021

Chae1 said:
I could push the hand throttle forward a bit.

Kind of defeats purpose of a vario though? I would plough at around 1700rpm with powershift gearbox.

If tractors struggling it senses it and gives it more revs.

Someone told me there were 20 new Hollands in getting fixed at a dealership in the Borders. You'll never guess who!

You need to take a trip down to the New Holland factory , they are repairing new tractor's before the can be delivered to the dealership,

Chae1 · Dec 18, 2021

fieldfarmer said:
Is this the mapped one that was out pulling that john deere ploughing? And has it been on the dyno yet?

Never been near a John deere for a lot of years.

It's putting out what it should.

What rpm is it producing maximum power?

shumungus · Dec 18, 2021

Chae1 said:
Never been near a John deere for a lot of years.

It's putting out what it should.

What rpm is it producing maximum power?

View attachment 1003801

Er...... that's rpm of the PTO shaft not engine rpm. They all usually sit at maximum power in and around 1000rpm PTO speed as that is the way they are designed/geared. PTO speed is usually in and around 2000 engine rpm.

nick... · Dec 18, 2021

Farma Parma said:
wasnt Deeres 40k Powerquad faster anyways didn they do about 28mph whatever that is in KPH which was faster than most other 40k tractors at the time.

My 6620 with a 40k box does 29.5mph.
nick…

The Demo Thread

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