Larry,
I am not wanting to start a banter with you on this and I am not trying to take away from your particular issue. My point is that I would prefer 3 good/high quality leaf springs over 4 poor quality leaf springs provided that the engineering stipulates that the 3 leaf springs are sufficient for the load calculated. I do not think that there is necessarily safety in numbers where this is concerned. Don't get me wrong, I like over-engineered versus under-engineered any day of the week but well-engineered is this most ideal. And even if it is well-engineered there is still the possibility of poor quality materials which in some cases is out of the engineers control.
Your are correct, how do you know what the quality is? Well I don't have a good answer for this but I do agree with you. Just like how do you know the quality of 4 leaf springs versus 3 leaf springs?
Another topic we could go back and forth about also would be why not put three axles under these longer, heavier rigs instead of just 2? More tires, springs and axles to spread the load over. (Maybe a topic for another thread)
Just my personal opinion and 2-cents,
Mark
Hi Mark,
I agree with you about not bantering, period, and quality is obviously more important than quantity, especially regarding safety issues, and leaf springs and suspensions fit into that category. If the 3 spring leafs were of optimum quality, I would be fine, but you and I both know they are not!
Also has John Dar has made clear in the following post, the steel used to manufacture springs should be of a required quality, but the QC ain't so hot if they are made in China, which I believe is where Lippert has their manufactured their axles I also asked Lippert whether they make their products per a certain safety standard that could be checked out, and I haven gotten a clear answer. They feel they are making their products up to safety standards.
My point with you, Mark, was 3 leaf springs, especially since they are mass produced with equal thickness, and quality, just aren't strong enough, per all the breakdowns we have read and heard about. At least with 4 or 5 leaf springs set at 7,000 lbs. strength, you should feel a bit safer, at least I do! If the 3 leaf springs were of proper thickness and manufactured properly, I do agree with your assessment. Let me know when that occurs. LOL Your point of 3 axles is great, but not realistic, as only the toy haulers and heavier models get that extra axle. I don't think Landmark's are more than 2 axles either. I hope that clarifies my point of view, so we can drop that discussion.
This brings up another question that is open to all. Are all the leaf springs supplied by Lippert, exactly the same strength and quality, that are made for each model? Are the toy hauler springs made thicker and stronger? I have no clue, but if someone can enlighten me I would appreciate it. This would also give the answers to Mark's original point he was trying to make.
Per my own situation, today Lippert delivered 2 7,000lb axles with the 5 leaf springs attached, to my home, where they sit in the garage. Should they also replace the shocks with that, or does anyone think that the ones they put on in Oregon, will do the job? Are shock absorbers different strength per the weight of the axle or the same, meaning one size fits all? In short order, Lippert is sending out their own technicians to replace my 6,000 lb axles with 3 leaf springs with the new ones just delivered today.