Tigerotor77W
Senior Member
When did NH adopt the curved boom?
http://www.khl.com/conexpo/article.asp?articleid=163
Is Case next?
http://www.khl.com/conexpo/article.asp?articleid=163
Is Case next?
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NH curved boom?
- Thread starter Tigerotor77W
- Start date
coopers
Senior Member
I believe in Europe that's nothing new. Case has curved booms in Europe because Case and New Holland work together or something like that...not sure, someone else knows. Don't think Case North America will go to curved booms.
Phil
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- retired operator and mechanic
What advantage does the curved boom offer? If I don't ask, I'll never know. Phil
. PhilJCBgm
Well-Known Member
Curved boom offers no advantages. For awhile CAT and Deere were saying that you could dig over walls/obstructions. Kinda hokey.
Case will stick with straight booms in the US. Only reason they build cast iron booms is that they have a foundry that's long been paid for here in the US. Cast is durable, but heavy (bad for balance) and you can't weld on it. Ever notice how case booms come past the kingpost when in transport mode? It's to get that huge weight as far forward as possible.
Case will stick with straight booms in the US. Only reason they build cast iron booms is that they have a foundry that's long been paid for here in the US. Cast is durable, but heavy (bad for balance) and you can't weld on it. Ever notice how case booms come past the kingpost when in transport mode? It's to get that huge weight as far forward as possible.
Cat420
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There's been several situations where the curved boom on our Cat has come in handy. Like placing stone in a foundation. I don't know if it would be enough to pay extra for, but we bought used, so price was similar (actually less than Case in the area). Besides, if Cat and Deere had straight booms the Case guys would just say they were being copied for being the greatest or something
tuney443
Senior Member
I do believe it has more to do with optimal geometry placement and it's probably a stronger design.It begs the question--why then do most excavators also have a curved boom?
JS580SL
Senior Member
The bannana boom does let you work in closer to the machine, otherwise I see no need for it.
Tigerotor77W
Senior Member
NH did adapt the curved boom for its BHL product [in the US as well] -- the new boom designs are at ConExpo.
The official reason two different reps gave was that going to the curved boom reduces the transport height of the machine (in this case, by six inches).
The official reason two different reps gave was that going to the curved boom reduces the transport height of the machine (in this case, by six inches).
melben
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If the Case people said that Cat copied their machines they have every right to, the earlier Cat machines used almost a perfect replica of the 580E double boom cylinder over center backhoe. Not to mention the copied JD style loader. I have always been told that imitation is the most sincere form of flattery. Mel.
superwrench0166
Well-Known Member
just got done doing the brakes on our cat 420 and wow it has a new holland rear end.
JS580SL
Senior Member
The older ones like the B series have Ford stamped right on the back side of the axle. Spicer tranny, ZF front end, and a Perkins diesel.
CAT dealer told me early CAT backhoes had CASE dippers on the back.
I think when CAT first got into the BH market they duplicated what was already on the market. The designs were proven and the customers were familiar with it. Not to mention it cuts down on R&D costs.
CaptDave
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One would think that a curved boom would be stronger than a straight one. As in construction, a arch is stronger as it spreads the load out evenly over the entire span.
newjcb123uk
Active Member
JCB banana
When I worked in the JCB factory in 1991 I saw a "banana" curved boom being put through it's paces in the research department - when i asked why they were copying CATs design I was told that "It was wise to test out what the competition was doing incase it turned out to be better" - forward thinking you see without stubborn pride! Obviously it didn't turn out to be better than JCBs designs as it was never adopted.
When I worked in the JCB factory in 1991 I saw a "banana" curved boom being put through it's paces in the research department - when i asked why they were copying CATs design I was told that "It was wise to test out what the competition was doing incase it turned out to be better" - forward thinking you see without stubborn pride! Obviously it didn't turn out to be better than JCBs designs as it was never adopted.
Curved Boom
This allows you to load closer to a dump truck and it does allow you to dig closer to the machine without having such a long dipper stick. Some individuals dislike it for visibility when you swing sideways due to the depth of the boom vs the Case cast boom....but if you put a dump truck next to your stabilizer cylinder the curved boom will make it easier to dump into the bed than the straight boom...don't have to stick out as far so you keep your load in your bucket.
This allows you to load closer to a dump truck and it does allow you to dig closer to the machine without having such a long dipper stick. Some individuals dislike it for visibility when you swing sideways due to the depth of the boom vs the Case cast boom....but if you put a dump truck next to your stabilizer cylinder the curved boom will make it easier to dump into the bed than the straight boom...don't have to stick out as far so you keep your load in your bucket.
coopers
Senior Member
That's not a bad looking machine.
wildy
Member
nice machine but still a jcb fan
drag1line
Well-Known Member
tuney443
To add to the comments. The excavators use a curved boom for one reason..to clear the tracks. On TLB, lower travel height is the real answer for a curved boom. It is true though that the increased cross section does offer some increased structural advantages.
Note, the curved boom first came out in the early 1980's by......DYNAHOE on a model 1900, a 19' digging machine with 120HP and variable piston pumps. 12' cycle times could hit UNDER 6 seconds..but it cost as much as, at the time, as JD 690.
To add to the comments. The excavators use a curved boom for one reason..to clear the tracks. On TLB, lower travel height is the real answer for a curved boom. It is true though that the increased cross section does offer some increased structural advantages.
Note, the curved boom first came out in the early 1980's by......DYNAHOE on a model 1900, a 19' digging machine with 120HP and variable piston pumps. 12' cycle times could hit UNDER 6 seconds..but it cost as much as, at the time, as JD 690.