Question for backhoe users?

[Trigger]

Does it hurt to have the rear tires loaded all the time with a lot of backhoe use? The only thing I can think of is it might put extra load on stabilizers?

I am wanting a little extra stability/weight, dont care about making marks in the yard. This is on a B21.

Jason

 

[nkole]

Kubota states in the manual for my L39 that the rear tires should not be loaded when the backhoe is attached. There was previous discussion on this topic that the loaded rears and backhoe puts too much strain in the rear end.

Neil

 

[JerryG]

If I was you I would do what I did. Put on removable wheel weights. That way, you have the weight when you need it and don't have it on when you don't need it. They just use one nut on each side to hold the weights on.
http://www.tractorbynet.com/photos/showphoto.php/photo/65/sort/1/cat/500/page/2

 

[Dirthog]

My B21 had loaded tires for 4 years and no problems when i traded it they were still loaded so is my L48 and I would not have one with out it so much better balance

 

[Trigger]

I know kubota says not to load them and use backhoe, but pushing large stumps around I need all the traction I can get.
How heavy are the wheel weights? I think 100pounds per wheel would help a little (loading them according to manual is 190-200) Maybe that is a better idea. Do you think they make wheel weights for b21?

Also sorry for posting in wrong forum. Thanks for the replies...

 

[rbargeron]

With the Bradco I routinely lift the back of my tractor, move it sideways, and set it down - but it seems to take about all the hydraulic force it has to do that. This thread woke me up to why - the rear tires are 17.5-24's and loaded with liquid ballast they weigh around 700 lb each. The subframe is pretty massive too - add the tractor weight and pretty soon it's a lot to lift. Never really thought about the ballast effect on the BH. Good thing it's strong !

 

[mike69440]

Kubota states in the manual for my L39 that the rear tires should not be loaded when the backhoe is attached. There was previous discussion on this topic that the loaded rears and backhoe puts too much strain in the rear end.

Neil

I have added over 800 Lbs additional weight on rear tires, 300# on front and that is the way it should be IMHO.

http://www.tractorbynet.com/forums/...g/100910-l39-pucker-factor-reduced-wheel.html

http://www.tractorbynet.com/forums/kubota-owning-operating/95255-l-39-wheel-weights-actually.html

The % additional weight I have added to the L39 (1,100 lbs added to 7,000 Lbs) pales in comparison to the weight I have added to my old B7200 (+750 Lbs to 1600Lbs)

The B7200 has +1000 hours of abuse, doing stuff a little tractor has no right to, and runs just fine. It owes me nothing, I owe it a lot!

I hope and suspect the people who designed the L39 had little to do with writing the owner's manual. My L39 is a lot happier at 8,100-8,300 lbs than 7,000 lbs.

Even the power to weight does not seem much changed. Weighted, I can still run up a grade on my property at 5.4 MPH. I could do 5.6 to 5.7 MPH at best before adding the weight. I suspect loaded tires slow you down more due to sloshing of the juice in the tires that the same amount in wheel weights.

I would load the heck out of the B21. It’s built heavier than my B7200, maybe the L39!

 

[wushaw]

I have loaded rears in my L2800 and use my BH75 fairly regularly, I don't lift the rear end up when using my BH, I just set the parking brake, lower the FEL and put the stabalizers down and go to work.
Before loading the rears I was constantly pulling the tractor around and now it is at a very minimum.

 

[Jim Nelson]

When I bought the BH-75 for my B-7800 I saw in the manual that they say no loaded tires with the bh but yes for fel.Makes absolutely no sense for me so I asked my dealer and he said don't worry about it,leave them loaded.I have used the bh quite a bit and do everything I would with any machine and no problems.Maybe if I had a 3 point mount type bh I might worry but not with the set up I have.

 

[MarkV]

My B21 has had loaded tires for the last 1000 hours without problems. Loading the tires solved a lot of traction and stability issue for me.

As Jim mentioned in the previous post, my manual tells me to load the tires for loader use and unload them for backhoe use. One of the most ridiculous things I have ever seen recommended in an owner’s manual. At least at one time Kubota did not want owners to load tires on a cab tractor either. I suspect that this is more of a liability issue in the event of a roll over than an issue of the tractor being able to handle the extra weight.

MarkV

 

[john_bud]

I agree that loaded tires make a BH work more effectively.


I've seen the reason K used for not loading the rear's and seem to recall it was to do with possibly exceeding the tested rating of the ROPS structure. Could be wrong, that's just from memory.

jb

 

[Volfandt]

I've run loaded rears on my BX23 for about 3 yrs now and haven't had any problems yet.
According to the owners manual, the reason Kubota gives for not running loaded rears is due to the additional compression the rear tires will experience when carrying the BH and the tractor rolls over a large rock or other obstruction, theres a possiblilty that the compressed fluids will break the bead causing a rapid loss of both air and liquid, flattening the tire. It could even damage the tire and/or cause one to loose control of the tractor also.
To help offset this and when one wants to run loaded tires w/a BH, it's good to not exceed 3/4 fluid fill and even better not to exceed 1/2 fluid fill. This allows more space for fluid compaction.
Mine are loaded less than 3/4 but alittle more than 1/2 full.

I routinely work the FEL w/o the BH mounted and the additional ballast I get far offsets the possibility that I may blow a loaded rear tire.

 

[wushaw]

John the ROPS theory is questionable since a BB could weigh as much or more than a BH, I am not talking about the light duty BBs but the industrial ones. I know mine weighs 830lbs and the BH I have "BH75" doesn't feel it weighs much more if any.

 

[MarkV]

John the ROPS theory is questionable since a BB could weigh as much or more than a BH, I am not talking about the light duty BBs but the industrial ones. I know mine weighs 830lbs and the BH I have "BH75" doesn't feel it weighs much more if any.

Wushaw your point is well taken though I bet your backhoe weighs more than you think. On my tractors the B21 hoe is 892 lbs and the one on L39 is 1598 lbs. I would have to wonder if it has to do with where that weight is carried. Both a backhoe and a cab will be carrying it much higher than a box blade.

MarkV