Uneven chassis?

KB6930

Member
Location
Borders
I'm intrigued as to how you found out it needed to be levelled up?

We've had one that ate front right tyres quicker than any other we ever had and I always wondered if something wasn't quite square and it spun that tyre quicker than the other
 

Ducati899

Member
Location
north dorset
I'm intrigued as to how you found out it needed to be levelled up?

We've had one that ate front right tyres quicker than any other we ever had and I always wondered if something wasn't quite square and it spun that tyre quicker than the other

Mine was first day I had the machine and put a bucket on to clean a shed out,1 side touched the ground and the other didn’t 🤣
 

Ducati899

Member
Location
north dorset
It was a little bit out,not quite sure how it got through quality control or a pdi but I guess they hoped I wouldn’t notice 🤷🏻‍♂️
 

Attachments

  • 125A976B-49F7-4274-8421-75DC3F6164A6.png
    125A976B-49F7-4274-8421-75DC3F6164A6.png
    659.8 KB · Views: 0

Sausage

Member
The tolerances argument does ring true for me. Standard drawing tolerance is 0.25mm, you’re talking 10mm there, which is 40 components at the wrong end of tolerance.
 

Stewie

Member
Location
Northern Italy
The tolerances argument does ring true for me. Standard drawing tolerance is 0.25mm, you’re talking 10mm there, which is 40 components at the wrong end of tolerance.
There is not such a think as a standard tolerance.... you will never get 0.25 mm on a large welded structure made heavy sheet metal cuts like a Loadall chassis. For that you will need to put the assembly on a large milling machine, so you will only do it if absolutely needed.
Tolerances definiton is a big part of the design i.e. they are set according to functional requirements vs cost. You want the widest tolerances possible while keeping functionality. Here I would think is more a matter of quality control not picking a fault or not wanting to waste a chassis, although I find it difficult to believe for someone like JCB.
 

dowcow

Member
Location
Lancashire
There is not such a think as a standard tolerance.... you will never get 0.25 mm on a large welded structure made heavy sheet metal cuts like a Loadall chassis. For that you will need to put the assembly on a large milling machine, so you will only do it if absolutely needed.

I'm sorry I find this hard to believe there could be so much out. Steel used in large scale manufacturing is generally cut with computer controlled cutters these days, not by some bloke with an angle grinder. This is a JCB, not a pasture topper, and I would consider something that has to lift loads to substantial heights as something where getting the machine level to begin with is more than just slightly important.
 
The tolerances argument does ring true for me. Standard drawing tolerance is 0.25mm, you’re talking 10mm there, which is 40 components at the wrong end of tolerance.
Believe me jcb and tolerances means "we don't care". Old fella years ago had a brand new 3cx which either braked on left side right side or both but you never knew which was deadly on the road. Numerous visits back to dealer and back to jcb factory and they wouldn't change any parts as "everything was within tolerance" the problem was only cured by the too good to miss trade in deal at 1 year old. The thing with tolerances is if they are wide enough to begin with and then differing components are at opposite ends of the spectrum you have very big differences. Honest opinion on those spacers is that to jcb that is perfectly acceptable and if you don't want it someone else will but on a new machine there shouldn't be any imho.
 

Stewie

Member
Location
Northern Italy
I'm sorry I find this hard to believe there could be so much out. Steel used in large scale manufacturing is generally cut with computer controlled cutters these days, not by some bloke with an angle grinder. This is a JCB, not a pasture topper, and I would consider something that has to lift loads to substantial heights as something where getting the machine level to begin with is more than just slightly important.
Exactly. You have the equipment to reach any tolerance you need (within reason costwise) and more important to check it. So it is either a design choice (and if you don't like it there is plenty of competitors) or a single mishap that someone somewhere though of fixing in a cheap and cheerful way. If it is as bad as not being able to scoop the floor with a bucket, I hope it's the latter...
 

bluebell

Member
Lovely advert for buying a new JCB ? Anyone on here who works for or sell JCBS care to make a comment, i knew from experience that the paint quality on new JCBs to put it mildly was poor, but this?
 

Ducati899

Member
Location
north dorset
Lovely advert for buying a new JCB ? Anyone on here who works for or sell JCBS care to make a comment, i knew from experience that the paint quality on new JCBs to put it mildly was poor, but this?

I believe it was only the 526-56 which struggled with the issue and as they no longer produce them I guess it’s not so much of a problem anymore
 

2wheels

Member
Location
aberdeenshire
Believe me jcb and tolerances means "we don't care". Old fella years ago had a brand new 3cx which either braked on left side right side or both but you never knew which was deadly on the road. Numerous visits back to dealer and back to jcb factory and they wouldn't change any parts as "everything was within tolerance" the problem was only cured by the too good to miss trade in deal at 1 year old. The thing with tolerances is if they are wide enough to begin with and then differing components are at opposite ends of the spectrum you have very big differences. Honest opinion on those spacers is that to jcb that is perfectly acceptable and if you don't want it someone else will but on a new machine there shouldn't be any imho.
Leyland skid unit? Sounds like their brakes.
 

SFI - What % were you taking out of production?

  • 0 %

    Votes: 79 42.7%
  • Up to 25%

    Votes: 64 34.6%
  • 25-50%

    Votes: 30 16.2%
  • 50-75%

    Votes: 3 1.6%
  • 75-100%

    Votes: 3 1.6%
  • 100% I’ve had enough of farming!

    Votes: 6 3.2%

Red Tractor drops launch of green farming scheme amid anger from farmers

  • 1,287
  • 1
As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
Top