Hitch failure on a Diamond C FMAX 212

   / Hitch failure on a Diamond C FMAX 212 #41  
The trailer in question is manufacturer speced at 30K GVWR, not 32, not 40. If you want to argue about something, how about the gooseneck to frame design.
The exact same frame is used for the 40K trailer. The axles, brakes and tires may have been overloaded. The frame was not loaded (at least in that picture) beyond the manufacturers specs. If anything broke because of an overload, it should have been the part or parts that were not rated for that load, which did not include the frame. The design (or perhaps the welds) was clearly flawed, no argument there. That's probably why the frame broke, even though the load on it was within the manufacturers specs for that particular part (this is, of course, assuming that the load in the picture was what it was usually carrying).
 
   / Hitch failure on a Diamond C FMAX 212 #42  
The exact same frame is used for the 40K trailer. The axles, brakes and tires may have been overloaded. The frame was not loaded (at least in that picture) beyond the manufacturers specs. If anything broke because of an overload, it should have been the part or parts that were not rated for that load, which did not include the frame. The design (or perhaps the welds) was clearly flawed, no argument there. That's probably why the frame broke, even though the load on it was within the manufacturers specs for that particular part (this is, of course, assuming that the load in the picture was what it was usually carrying).
:ROFLMAO:
 
   / Hitch failure on a Diamond C FMAX 212 #43  
I still dont understand why you are claiming its overloaded when it isnt.

Capacity of trailer is GVWR - trailer weight + tongue weight.

Two 11k machines.....maybe total trailer is in the 35k ballpark.....but the load placement I'd say has AT LEAST 5k on the hitch. So thats 100% legal and not overloaded in the slightest.
 
   / Hitch failure on a Diamond C FMAX 212 #44  
I have overloaded my much “lower quality” Kaufman and haven’t experienced and weld failures or broken goose neck hitches.

Yet.
I've severely overloaded my Kauffman on more than one occasion actually with no adverse effects other than a bit of sag in the middle. I've put 29 rounds on it in the past and hauled them home and survived to tell about it.

The only thing I did have to do was I added steel plate gussets to the spring hangers as in a tight turn, loaded, the axle hangers were twisting sideways.
 
   / Hitch failure on a Diamond C FMAX 212 #45  
They need establish QC on their welding process starting with independent 3rd party NDT on safety items.
That would only increase the unit cost to where they would no longer be competitively priced. The trailer market, especially the GN trailer market is extremely competitive so increasing the unit cost to cover that would be detrimental to sales. My comment is crank up the amperage and increase the wire speed accordingly. It's MIG welded and not pulsed MIG either. If I was building them, I would have used high amperage globular transfer on critical welds.
 
   / Hitch failure on a Diamond C FMAX 212 #46  
Always keep in mind that MIG welding with gas shielded wire is way down on the skill level totem pole as well. Why weldors refer to MIG as the 'Glue Gun' of welding. The only time real skill becomes involved in MIG is when the operator is skilled at Globular Transfer which is ultra high amperage (with shielding gas) and requires skill to achieve a sound weld.

Any one can MIG weld, good prep or not. Why it's referred to as the Glue Gun of welding. In as much as the joints in question, you cannot see if they were prepped properly (as in bevelled) or if there was a root pass used prior to the cover pass so it's all conjecture if they were prepped properly or just fitted up and welded with no pre-prep. Butt welding isn't the strongest joint by a long shot.
 
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   / Hitch failure on a Diamond C FMAX 212 #47  
I still dont understand why you are claiming its overloaded when it isnt.

Capacity of trailer is GVWR - trailer weight + tongue weight.

Two 11k machines.....maybe total trailer is in the 35k ballpark.....but the load placement I'd say has AT LEAST 5k on the hitch. So thats 100% legal and not overloaded in the slightest.
Sure,
30000 GVWR - 11620 (trailer)=18380 -22800 (2 skids with cabs) = -4420 + (2 attachments) -3000 = -7420 + 5000 tongue (if truck can handle) = -2420 (+chains/binders, stuff in boxes)

Oh, btw, that 3” coupler is only rated for 30k also
 
   / Hitch failure on a Diamond C FMAX 212 #48  
Why it's referred to as the Glue Gun of welding. In as much as the joints in question, you cannot see if they were prepped properly (as in bevelled) or if there was a root pass used prior to the cover pass so it's all conjecture if they were prepped properly or just fitted up and welded with no pre-prep. Butt welding isn't the strongest joint by a long shot.
Any good guesses on why anyone would butt weld the goose neck to the frame ?
 
   / Hitch failure on a Diamond C FMAX 212 #49  
The only thing I did have to do was I added steel plate gussets to the spring hangers as in a tight turn, loaded, the axle hangers were twisting sideways.
Ive seen chunks of beam tore out of the frame because the air spring hangers were wrought out in turns, because no gussets were added in the I beam above them.
 
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   / Hitch failure on a Diamond C FMAX 212 #50  
Sure,
30000 GVWR - 11620 (trailer)=18380 -22800 (2 skids with cabs) = -4420 + (2 attachments) -3000 = -7420 + 5000 tongue (if truck can handle) = -2420 (+chains/binders, stuff in boxes)

Oh, btw, that 3” coupler is only rated for 30k also

I wasnt really asking a question. I was making a statement.

Fact is, we can all argue the weights but we really have no clue.

The skids are only ~10,600 ea....so 21,200 for the pair

And that skid weight is WITH a 78" bucket. I see no buckets. I see attachments but cant tell what they are. But dont see the attachments combined being 3000 pounds MORE than a pair of buckets.

Cant see the truck, cant see the hitch.

So you are basically....by your numbers.....guessing that it is 2420# over weight. But your at least #1600 too high on the skids

Im simply guessing that it is right at or just under. But either way........without all the facts....why continue to argue about being overweight? when that was NOT what caused this issue anyway
 

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