Rock 'n Rolling ROPS

   / Rock 'n Rolling ROPS #1  

Don_Curley

Bronze Member
Joined
May 30, 2001
Messages
70
Location
La Sal, Utah
Tractor
Kubota B2910 HST
Rock \'n Rolling ROPS

After using my B2910 for planting a whole lot of poplars (relatively light duty), I have now switched to leveling a couple of acres in preparation for a large garage/shop building on my property. I have been using a box blade for this, and this clearly moved my tractor into the heavy duty arena. Because the land is fairly rutted and bumpy, even at relatively slow speeds, my ROPS (and it's the one-piece type with an attached canopy), is rocking back and forth (or I should say, fore and aft) rather violently. It is clearly moving at the point it bolts to the ROPS subframe that comes up from underneath the rear fender assemblies. At first I thought the nuts must be loose, but when I checked them I could hardly budge them to tighten them further. Although I did not remove the bolts, I am now wondering if the bolt diameters are substantially less than the respective holes (thereby allowing the two "parts" of the ROPS system to inordinately flex at that juncture, independent of the relative tightness of the bolts themselves).

Has anyone else had this problem? Is the connection between the ROPS structure and its subframe supposed to be this loose for some reason? If not, how can this be fixed (i.e., short of welding the parts together, which I don't think would be a good idea)? The way my situation is now, I keep wondering when something is going to break, go into orbit, or come crashing down on my head. Somehow, this condition does not seem right to me. Any thoughts, suggestions, or experiences in this regard would be much appreciated.

Thanks in advance,
Don
 
   / Rock 'n Rolling ROPS #2  
Re: Rock \'n Rolling ROPS

Don, if its doing that to your ROP's imagine what its doing to everything else. If its that bumpy, it seems that the only solution is to slow down or get a D4 first and do some rough grading. I have done a ton of grading but never had the ROP's situation you describe. Good luck, Rat...
 
   / Rock 'n Rolling ROPS #3  
Re: Rock \'n Rolling ROPS

Don,

I think there was a problem documented awhile back that sounds similar. I think it had happened with a B7500 or two, and maybe a B2710 - something about a missing spacer which prevented the bolt preload from getting enough friction into the joint at the attachment. Might want to check the archives - I think it goes back about 4-6 months or so.

Rob
 
   / Rock 'n Rolling ROPS
  • Thread Starter
#4  
Re: Rock \'n Rolling ROPS

Rat,

Actually, my neighbor has a Cat and I wanted him to do the initial "hard" work, but he was unavailable (and I am under the gun to get the land prepped date-wise). But I'll tell you what, once this started happening, I was able to easily rock my ROPS/canopy assembly fore and aft quite easily by hand. And in terms of my speed, I am only running in low gear, so I am not burning-up the race track by any means. I am just quite surprised that the ROPS-to-ROPS subframe connection is so relatively loose (I can push and pull it by hand a good 1" to 2" of total deflection). With that situation, it doesn't take much of a bump in the road to get the ROPS assembly rocking.

Don
 
   / Rock 'n Rolling ROPS
  • Thread Starter
#6  
Re: Rock \'n Rolling ROPS

Rob,

Thanks ... I'll do a search of the archives.

Don
 
   / Rock 'n Rolling ROPS #7  
Re: Rock \'n Rolling ROPS

I think I remember an issue with some of the folding ROPS rocking, rattling, etc. The cure for a lot of those was putting in a couple of washers that had been missed during dealer assembly.

I would check to be sure that the bolts haven't "bottomed" by running out of threads before they're tight. Aside from that, the ROPS bolts get tightened to a pretty high torque value, well over 100 ft-lbs as I recall.

The GlueGuy
 
   / Rock 'n Rolling ROPS #8  
Re: Rock \'n Rolling ROPS

Something is wrong. By definition, a ROPS is supposed to be strong and rigid. I'd tell the dealer to fix it unless it is something obvious.

What variety of poplar did you plant there? Did you choose poplars for a fast growth rate?
 
   / Rock 'n Rolling ROPS
  • Thread Starter
#9  
Re: Rock \'n Rolling ROPS

Glennmac,

Although my "local" dealer is 160 miles away, I am planning on contacting them with regard to this undesirable situation with my ROPS.

In terms of the poplars, my wife and I have been fond of the very tall, cylindrical types. We ended up planting 32 saplings along our western property line for a wind break. We went with a hybrid variety ... a Theves poplar ... which is supposed to be more disease resistant and longer-lived than the more common Lombardy poplar (although both share a very fast growth rate). Ironically, this tree planting project turned out to be such a physical task for country transplanted city folks, that we agreed to buy a tractor ... our first -- a Kubota B2910. So, these turned out to be some of the most expensive trees in the county. And now what? Well, of course ... we need a new steel building to properly house our tractor and implements from the elements. This is getting damn expensive (but we don't regret it either).

Don
 
   / Rock 'n Rolling ROPS #10  
Re: Rock \'n Rolling ROPS

Don, the ROPS on my B2710 is, and always has been, solid as a rock. Sounds like it has to be one or more of the things already mentioned: wrong bolts - diameter too small and/or too long without enough threads to tighten, or a missing spacer (and I'm not sure there is a spacer on that model).

Bird
 

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