OP
KrisHansen
Gold Member
dqdave1 said:
They do, I'll reserve naming them till I get some unfavorable news..
ARRRRRRGH!!!!!!! Broke my tractor.... Engine Block went SNAP...
- Thread starter KrisHansen
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They do, I'll reserve naming them till I get some unfavorable news..
Eagleview
Veteran Member
A guy on the Kioti site of TBN just had his tractor break in half , its the same old story . The loader has at least a 4-1 leverage advantage over the middle of the tractor . If you apply say a 400kg load to the bucket whilst pushing , it equates to around 1600kg's at the end of the loader support frame . Combine this with the torque induced upward lift on the center of the tractor via the back wheels and the thin wall cast housings give up . Fabricated brackets from the front of the loader frame to the rear diff housing are manditory for loader/backhoe mounting . Im affraid what works on a CAD drawing on a computer does not allways work in the real world . Your loader frame acted like a pinch bar on the block it was only a matter of time before it broke it .
arrow
Super Member
If it cracked from the top, I don't think it was because you had snow in the bucket. You may have had the perfect storm going. Faulty casting coupled with at least a six to seven hundred pound implement out back and at least a couple of feet out back increasing its load force and then the loader use with another extended weight out front and it was like the old stick break over the knee. That combination just kept working that part of the tractor till it gave up the ghost. It should give you a clue as to reinforcement in the meantime I share your agony. To us tractor guys, I think we'd all prefer a broken arm as opposed to a broken tractor.
OP
KrisHansen
Gold Member
Iron Horse said:
That's EXACTLY right. And I plan on making some very beefy brackets when I get this thing back..
I can't believe that NH would send out a tractor of this size/power with a wimpy loader mounting like this model has. It's pathetic. I'm very frustrated with New Holland at the moment.
OP
KrisHansen
Gold Member
arrow said:
Of course. And the complete and utter lack of any sort of subframe didn't help.
MikePA
Super Moderator
Kris, I empathize with your frustration. However, there are quite a few Class II owners on this site who also have a 7308. If this is a design issue, why aren't there more failures?KrisHansen said:
OP
KrisHansen
Gold Member
MikePA said:
I have no idea. If it wasn't a design issue, why did NH completely redesign the loader on later models? Why didn't they continue to use a loader that had no reinforcement between the front and middle/rear pieces? The newer loaders have rigid mountings between the rear mounts and the engine's subframe.
The 7308 allows a lot of twisting and leverage forces on the engine block as far as I see it..
Yes, I feel that I had a bad block from the beginning, but I still don't understand why the engine block alone has to support the entire weight of the loader's capacity, which on a 33D is almost 1500lbs IIRC... Not sure what it is on the 25 and 29, but I'd assume that it's less..
Also interesting, and probably just meaningless, on Messick's site, the NH parts catalog doesn't even list the 33D on the 7308 loader parts pages..
bandit67
Veteran Member
- Joined
- May 27, 2004
- Messages
- 1,610
- Location
- Lake Hartwell, SC
- Tractor
- 2012 B3000 HSDCC 2020 Z251 Zero Turn
After owning a CNH subcompact for 225 hours, and logging 100 hours on a competitor's sub that a neighbor owned, and having the advantage of being able to do side by side comparisons on my own property, I'm done with CNH products.
I think at least the compact CNH machines leave a little to be desired with regards to overall design and build quality. Too many corners cut that impact overall quality. I was pretty unimpressed with CNH quality - it's too bad, because their features were what originally won me over.
I think at least the compact CNH machines leave a little to be desired with regards to overall design and build quality. Too many corners cut that impact overall quality. I was pretty unimpressed with CNH quality - it's too bad, because their features were what originally won me over.
mahlers
Gold Member
One thing you might look into is a subframe mount for a backhoe. Those typically make a VERY strong connection between the rear axle and the loader mount. You'll lose some ground clearance, but you'll never again worry about breaking anything. And, if you eventually decided to get a backhoe, you could just pop it on. The big benefit is that the subframe is a reasonably simple bolt-on affair - you don't need to attempt to fabricate anything yourself. They're pretty reasonably priced, too - for my Bradco 611, I think the subframe mount for my TN70S came out to $500 or so, and that is a BIG subframe.
MikePA
Super Moderator
One of the reasons is so the loader looked better on the Boomers. The 7308 is a blocky/squarish design that matched the previous line of compact tractors that looked like the TC30. They redesigned the tractor first, then the loader.KrisHansen said:
AFAIK, all the Class II Boomers with the 7308 loader can lift the same amount.
Your profile picture shows the tractor with a 3ph snow blower. Did you have the blower on when this happened? I reviewed your posts and didn't see that you mentioned this. If you did, was the blower off the ground at the time?
I ask because you mentioned the block broke from the top, down.
A large weight at the back (blower), a large weight at the front (loaded bucket) means the bottom of the block is under compression and the top is under tension. That'd cause the block to break from the top, down, like breaking a stick over your knee.
Just a thought from someone who's not an engineer.