To 3PT or to subframe, just the facts.

   / To 3PT or to subframe, just the facts. #51  
Robert_in_NY said:
I had posted pics on here years ago of my friends Kubota that was broke because of a 3pt backhoe. They had it in their shop repairing it when I took the pics. If I remember right it was an old B-series

A big enough tractor can run a 3pt backhoe with little or no effort or any side effects. A small cut just isn't built heavy enough to handle a 3pt backhoe. If you want to buy a 3pt backhoe and put it on a small cut no one can stop you and I personally don't care what you do. But I also know if you do and the tractor breaks in half there will be a thread on here about how the "tractor" had a "casting defect".

I do not know of any tractor OEM who will warranty a tractor that had a 3pt backhoe. They sell them because bigger tractors can use them and if you only need it occasionally they are fine. But some people buy them and use their tractors like a full size Industrial TLB and these are the guys who have problems with them, well, so do the guys who just plain abuse their equipment.

Kubota SPECIFIES a 3 point hoe on their small compact tractor and they will warranty them. Now you know of a tractor OEM who will warranty one.
 
   / To 3PT or to subframe, just the facts. #52  
8561 said:
Kubota SPECIFIES a 3 point hoe on their small compact tractor and they will warranty them. Now you know of a tractor OEM who will warranty one.

What models? If I recall, Kubota has a special setup for a 4 point connection of their backhoes on their smaller tractors like the BX24.

Granted, it isn't a subframe design but it isn't a 3pt design either. It is a purpose built design to avoid some of the major flaws associated with 3pt units (like breaking the ears off the top link mount on the tractor).

Also, Kubota doesn't even offer backhoes on their sub-compacts except the BX24. I wonder why?
 
   / To 3PT or to subframe, just the facts. #53  
For what it's worth, the neighbors orange tractor has a 3pt hoe. The top link 'pin' is bent so badly in a U shape that we can't get it out by conventional methods.

I'm just saying.....this thing has taken a good beating and is still in one piece.
 
   / To 3PT or to subframe, just the facts. #54  
Originally posted by Willl
For what it's worth, the neighbors orange tractor has a 3pt hoe. The top link 'pin' is bent so badly in a U shape that we can't get it out by conventional methods.

I'm just saying.....this thing has taken a good beating and is still in one piece.

I hate to see someone make a mistake matching a backhoe to a tractor. The 3pt hoe I bought would easily throw my Deere 770 around, could see how it could damage it no problem. A couple hundred dollars of steel and several hours welding= subframe, everytime I used it I was glad I made the subframe.:)

This situation appears to be a manufacturer match up. Warranty and all.

I think the kubota B7500 uses a 3pt hoe. model B4675. There are guys on here that own 'em.
 
   / To 3PT or to subframe, just the facts. #55  
Robert_in_NY said:
What models? If I recall, Kubota has a special setup for a 4 point connection of their backhoes on their smaller tractors like the BX24.

Granted, it isn't a subframe design but it isn't a 3pt design either. It is a purpose built design to avoid some of the major flaws associated with 3pt units (like breaking the ears off the top link mount on the tractor).

Also, Kubota doesn't even offer backhoes on their sub-compacts except the BX24. I wonder why?



B7500, 7510, 2410, 7610, 2710, 2910,.........
 
   / To 3PT or to subframe, just the facts. #56  
8561 said:
B7500, 7510, 2410, 7610, 2710, 2910,.........

I am not positive how the backhoe for these models attaches but I found this interesting on Kubota's site

Important Note:
[FONT=Verdana, Arial, Helvetica, sans-serif]A Kubota Front Loader is required at all times when utilizing B4672A on B-Series Tractors or BL4690A Backhoe on B2710 or B2910 Tractors.[/FONT]

Does the loader mount system tie the tractor together? Or why is it required to be on for use with the backhoe on the models listed? If you use the backhoe without the loader would it then void the warranty?
 
   / To 3PT or to subframe, just the facts. #57  
wedge40 said:
Just to let you know.. Thats not a "rock" that's a BOULDER. :D
We'll all be looking at what you accomplish with the tractor and backhoe.
Nice looking outfit. Wedge

Ill have to show you my back yard some time tis but a peble ;)

A point no one has mentioned yet. you can add armor much more easily to the tractor by using the subframe mount. you can also include some for the bh subframe. both being removable for service.

I have a larger tractor & bh I have never owned a 3pt nor will I. it was mentioned about the lever factor for lessening the stress to a tractor. that is an important fact. when you get a 9k+ tractor hopping around because your having to much fun with the bh you will never question the worth of a subframe again.

the 3pt are handy for occasional use. If you plan to use your equipment and use it well all parts will thank you for a subframe. I buy somthing with the intention of never buying another because it broke. I will buy another when I see my normal use has worne the old one down. preferably with one that is even tougher.
 
   / To 3PT or to subframe, just the facts. #58  
Robert_in_NY said:
What models? If I recall, Kubota has a special setup for a 4 point connection of their backhoes on their smaller tractors like the BX24.

ROBERT:
The sub-compact BX24 uses a fully integrated subframe for its BT601 hoe,
like on the B21, B26, L39. Totally different from other Kubota hoes.

The 4672/4690 3-pt hoes are sold for the compact B-series primarily,
though they can be used on any 3-pt. The BH75/BH90 hoes use a
4-pt subframe from Kubota for the Ls. The last 4690 I have seen
mounted was on a B2910 or B7800, I do not recall. These Bs are very
light (under 2000 lb naked) and adding a 1000 lb hoe to the rear without
a FEL will result in wheelies. The 4690 hoe on the Bs I have seen did
not in any way tie into the FEL subframe. They DID have an anti-lift
brace as part of their attachment to avoid 3-pt lift.
 
   / To 3PT or to subframe, just the facts. #59  
My B2410 Backhoe is a straight 3 point mount as well. Relative to Robert's research on the loader requirement, it's a very good point, and I think dfkrug is correct in the reasoning for it. I would also point out that Kubota does require a heavy duty top link attachment, and also sells a frame stiffening kit which I have on my tractor. However, this additional frame stiffening does not in any way impact the 3 point mounting, and in fact, my hoe would mount to any Cat 1 3 point hitch at any time.
 
   / To 3PT or to subframe, just the facts. #60  
dfkrug said:
ROBERT:
The sub-compact BX24 uses a fully integrated subframe for its BT601 hoe,
like on the B21, B26, L39. Totally different from other Kubota hoes.

The 4672/4690 3-pt hoes are sold for the compact B-series primarily,
though they can be used on any 3-pt. The BH75/BH90 hoes use a
4-pt subframe from Kubota for the Ls. The last 4690 I have seen
mounted was on a B2910 or B7800, I do not recall. These Bs are very
light (under 2000 lb naked) and adding a 1000 lb hoe to the rear without
a FEL will result in wheelies. The 4690 hoe on the Bs I have seen did
not in any way tie into the FEL subframe. They DID have an anti-lift
brace as part of their attachment to avoid 3-pt lift.

Thanks for the explanation. I do not know very much about the smaller Kubota's so every little bit I learn is great.
 
 

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