Bump up lift capacity of L3400/LA463 Loader

[john_bud]

I must be missing something in this thread, I jumped on the band wagon too and went and bought me a pressure guage and plugged her into one of the loader valve QDs and got 2200psi and then I went and looked at my loader operators manual and it says the max pressure is 2347psi.

John Bud I see your attachment and it says it's 2347 - 2489 and the tractors are L3010-L4310.

Where is this 2450 - 2750??????

Where is 2450 - 2750? Why they are between 2350 and 2850!

Or did you want the non-smartazz answer? Oh...

Those numbers are 10% higher than rated mfg values for my version of tractor.


If my tractor was spec'ed at 2276 psi to 2347 psi, I would not personnaly have any qualm about resetting it up to 2500. Wouldn't want to jump it up to 3000, and 2700 might make me nervous. But, 2500 would be just ducky.

Why no qualms? Because the hardware is about identical, so the ability to take the pressure is about identical. But the MARKETING department needs to stratify the products so different price points can be met. Hmm, let's think. Would it be cheaper to design and build parts that are 99.9% identical but that self destruct at the higher pressure or is it cheaper to just take out a shim? Hmmmm I wonder....

YMMV

jb

 

[swampvol]

Sorta like chevy rating the 350 in a camaro at 350hp and rating the exact same engine, with minor tuning, in a vet at 425?

Thats what I was thinking too, JB.

 

[wushaw]

Where is 2450 - 2750? Why they are between 2350 and 2850!

Or did you want the non-smartazz answer? Oh...

Those numbers are 10% higher than rated mfg values for my version of tractor.


If my tractor was spec'ed at 2276 psi to 2347 psi, I would not personnaly have any qualm about resetting it up to 2500. Wouldn't want to jump it up to 3000, and 2700 might make me nervous. But, 2500 would be just ducky.

Why no qualms? Because the hardware is about identical, so the ability to take the pressure is about identical. But the MARKETING department needs to stratify the products so different price points can be met. Hmm, let's think. Would it be cheaper to design and build parts that are 99.9% identical but that self destruct at the higher pressure or is it cheaper to just take out a shim? Hmmmm I wonder....

YMMV

jb

Ok I can understand that. For me though I had a problem with my previous B7500 blowing hyd hoses ( 3 in the 400hrs I had it) so I am a little lerry about upping the pressure and see where the week link is in my FEL when I have something fairly heavy on the other end.

I think I will just leave things as they are since nothing has broke...yet.

 

[Goog]

Now I am a little nervous at my higher pressure of around 2750 psi. I think I am going to leave it as is for now. My hoses are marked 3000 psi and burst pressure is going to be much higher than that.

When I used to unload my round bale of the loader seemed much more responsive to my commands. I don't abuse my equipment by any means and don't plan on testing the maximums of the loader but I really needed to move round bales of hay.

If I decide to lower the pressure I would probably go to 2500 psi and see how things work out.

Thank You all for the updates on the corrected pressure numbers. Brian

 

[MessickFarmEqu]

Sorta like chevy rating the 350 in a camaro at 350hp and rating the exact same engine, with minor tuning, in a vet at 425?

Thats what I was thinking too, JB.

This is true, but do remember that you probably have a lighter axle than whats on the L3010. Kubota is a very Conservative company when it comes to this kinda stuff. Everything has a good margin of error, so you have some room to play with.. but be sane about it. You'll probably start seeing things like premature leaking around the axle knuckles if you push it too far.

 

[john_bud]

Ok I can understand that. For me though I had a problem with my previous B7500 blowing hyd hoses ( 3 in the 400hrs I had it) so I am a little lerry about upping the pressure and see where the week link is in my FEL when I have something fairly heavy on the other end.

I think I will just leave things as they are since nothing has broke...yet.

I would look for a reason why you were blowing hoses. Was there any rubbing? Pinch points? Weather checking? Was it at a bend point? Or was it at the fitting end? You may have had a bad batch of hose too.

Hoses are very robust normally. I've only had 2 that literally blew apart. One was on a new to me 40+ year old machine and it blew out one next to my head (exciting!) the other was a bucket curl that blew at the bend.

 

[swampvol]

This is true, but do remember that you probably have a lighter axle than whats on the L3010. Kubota is a very Conservative company when it comes to this kinda stuff. Everything has a good margin of error, so you have some room to play with.. but be sane about it. You'll probably start seeing things like premature leaking around the axle knuckles if you push it too far.

Damage to the axle would be my main concern. One of the reasons I bought the 3400 over the mahindra was that the axle on the 3400 appeared to be stronger, even though the mahindra's lift capacity was a little higher.

I don't think going from 2200 to 2500 is too extreme, or is it?

 

[wushaw]

I would look for a reason why you were blowing hoses. Was there any rubbing? Pinch points? Weather checking? Was it at a bend point? Or was it at the fitting end? You may have had a bad batch of hose too.

Hoses are very robust normally. I've only had 2 that literally blew apart. One was on a new to me 40+ year old machine and it blew out one next to my head (exciting!) the other was a bucket curl that blew at the bend.

They were blowing around the crimps so I suspected whoever built them for Kubota probably over crimped them, so I'm just a little shy of messing with it on the L2800 since none have blown....yet.

 

[swampvol]

I've put about 20hrs (mostly with the bh) since bumping it to 2500. No problems, but I haven't really done anything to push the limits either.

I do notice a little more force while digging up a few maples and wax myrtles to transplant, then again it could just be the placebo effect.

Anybody else?

 

[JustGary]

All -

I need to do a one-time lift of a piece of machinery (to put it on its stand/cabinet), and after reading this thread I have a few questions:

At what RPM did you measure your pressure? I generally run my L2800 at PTO speed, not wide-open. For those of you with a gauge, how much pressure difference do you see at PTO as opposed to WOT? I have not problem with running at WOT, but I am curious about the difference.

I need to lift ~1200 pounds *safely* to 9 feet high. I figure that's right at the limit of the rear lift arms at 3 feet from the pins, and pretty close to the loader lift capacity at the pins if I remove the bucket (several hundred pounds) and replace it with a short boom pinned directly to the loader arms.

Either way, I'll be right at the maximum rated limit, and I'll need to be careful during the lift. My assumption is that both the loader and lift arms are mechanically strong enough, and that the hydraulics will refuse a lift that's too much, but if it can lift it, it will keep it up. Have any of you actually measured the lift capacity of your loader? It would be nice to know if the LA-463 can really lift its rated lift.

Even if I rent a hoist I'll treat it like I can't really trust it, so let's not get into the safety part of working under 1200#. I don't plan on ever getting under it.

I don't want to hijack the thread, but finding a few hundred pounds of extra lift in my tractor is exactly what I need. I'm strongly considering upping the pressure to 2500 PSI for a few hours for just a bit more margin.

Regards,

- Just Gary