jh.

Member
Location
fife
The key difference (other than hp) since those halcyon days is tyre width.

I used to plough with a Ford 5600 on 13.6r38, with wheel weights, pulling 4x12" furrows.

That became a 4x12" reversible on a 2wd MF399 on 16.9r38, but struggled in heavy going....so we put the 4wd 956XL turbo Nash on the plough....and broke the plough

That became 4x14" on an 8340 Ford, on 20.8r38, which again struggled for grip, the Maxxum with a heavier back end, and wheel weights (it was a loader tractor) on 16.9r38 pulled it much easier

5x14" (with press) fared fairly well on a 6290MF on 18.4r38, then a 6480 on 20.8r38 (but both needed weights and diff lock in tough going

6x14" on a MF 7495 on 20.8r42 went well, that thing did put the power down very well indeed (shouldn't of sold that tractor!)

We now have a 7f semi mounted vari width plough, usually hung on a 7620 MF on 20.8r42/16.9r30 wheels. Its amazing how well it goes really, a ton on the front and away she goes.

The key is grip, not power. An engine pulls best when its governing (that's the definition of 'Grunt') - the engine needs to pull down before grip is lost, then traction is maximised. Highest gear lowest rev kind of thinking.

I see people on 650&710 tyres revving and chewing and spinning pulling smallish ploughs with biggish horsepower. Put narrower wheels on and she'll go much better.

We until recently had two 7620's - virtually identical tractors, except the wheels. The one on the 20.8r42's would always outgrip the other on 620's, almost regardless of job. A narrow, but long footprint is far more effective than a short wide one. Think how a crawler works.
Totally agree. The 200hp is on 650s but the 180 is on 18.4r46. The dtm is much better on the 7720 tho , it has max rev limits that work so can lug down , while the 7485 just opened up and spun away , so dtm never used for ploughing ime.
 

Spud

Member
Arable Farmer
Location
YO62
Totally agree. The 200hp is on 650s but the 180 is on 18.4r46. The dtm is much better on the 7720 tho , it has max rev limits that work so can lug down , while the 7485 just opened up and spun away , so dtm never used for ploughing ime.
I was ploughing after beet with 7f on our old 7490 (on 580's) It's a proper old lugger is that tractor, just set the supervisor dial to about 15%, set the A throttle to about 2100, cruise to about 7kph, diff lock in and she'll sit down and pull at 1750rpm all the way up the field.
Same tractor behaves the same way with a Simba SL400 on it's back.
 

ajd132

Member
Arable Farmer
Location
Suffolk
I'm convinced things are getting harder . Back when I first started I was ploughing with a 3070 Massey on a 4 furrow and dropping the back furr off in the heavy stuff when it got wet but rarely remember having to stop ploughing . More recently building up to circa 150hp on the 4 and this winter currently sitting with a 200hp on a 5furr and a 180hp on a 4 , both of which haven't been able to move this month so far .
Isn’t that telling you something?
 

Deutzdx3

Member
It came up earlier in this thread and is stated on the website; if you copy the design yourself and grow a crop with it, it is illegal to sell that crop or use it for any commercial purpose.... :unsure:
He will bankrupt him self trying to defend the patent. Horrendously expensive defending IP. Only needs to be a slight difference, a bolt location or angle for it to be a void defence.
 

robs1

Member
I'm convinced things are getting harder . Back when I first started I was ploughing with a 3070 Massey on a 4 furrow and dropping the back furr off in the heavy stuff when it got wet but rarely remember having to stop ploughing . More recently building up to circa 150hp on the 4 and this winter currently sitting with a 200hp on a 5furr and a 180hp on a 4 , both of which haven't been able to move this month so far .
That's what cultivation does to soil
 

Forum statistics

Threads
192,736
Messages
4,410,427
Members
48,318
Latest member
xsmb99

The 61st Doe Show - Starts 25th January 2021

  • 353
  • 1
Screenshot 2021-01-22 at 18.14.10.png

The Doe Show has been a firm fixture in the agricultural, construction and groundcare industries calendars since 1960. Held during the first week of February every year, the Doe Show attracts huge crowds to our head office at Ulting, Essex and is by far the largest agricultural, construction and groundcare machinery dealer in the UK, possibly Europe.

Given the current pandemic and restrictions we find ourselves under, it would be irresponsible to hold our 2021 Doe Show in the physical sense. However, we are delighted to be able to bring the 61st Doe Show to our customers, albeit in a different way than we have over the past 60 years. Finding new ways of engaging with our customers excites us and we are...
Top