3-Point Hitch 3 pt shaking

   / 3 pt shaking #1  

JefferBo

New member
Joined
Apr 30, 2005
Messages
11
I purchased a Century 42L the last year it was offered for sale. I absolutely love the tractor. I live in a part of the Midwest that was really hit by the ice storms last month. I was finally able to free my tractor from the fallen branches and ice that sent its shelter crashing down around it (only sustained very minor damage to the canopy!).

Now to the point. I have been clearing my woods from all of the fallen forestry debris and I recently noticed some shaking from my 3 point hitch. I tracked down a small leak in the gender-bender fitting that allows for the two hydraulic lines that connect to each other when the bh is not attached to actually come together (it's a straight male thread on both ends). I put some sealant on the threads and the leak stopped. Right after doing this, however, I really noticed the up-and-down movement of my bb and rake. When idling, it's as though I am parked next to the car at the stop light booming out rap music--really loudly. If I put the implement at rest on the ground, with the position control, all is well. If I bring it up to any point other than ground rest, my whole tractor "shakes" a little bit (like when your child really has to go the the bathroom and may not quite make it). Moreover, if I raise my FEL after grabbing a log with my grapple, my rear implement goes down. If I release my FEL joystick and stop its movement, the rear implement goes back up. And then, when I shut down the tractor altogether, the FEL stays up but the rear implement immediately settles down on the ground (if they were both off the ground when I turned off the ignition). There were a few times today when things operated as they used to (no up/down shimmy) but the shakes always came back.

I called my dealer and he suggested that I might have some air in the lines. Is this what it sounds like to any of you? Can I bleed the lines of air somehow. If not, how long does it take for the system to self-adjust? I was probably on the seat for about 5 hrs today and it shook most of the day. The problem seems to be isolated to the lines that are coupled together when you remove the bh (I think it comes off the pump under the seat). If I grab this line while the rear implement is off the ground, I feel a very distinct pulsing going on. If the implement is on the ground, however, there is no pulsing. My FEL works exactly as it should. I checked to make sure that my draft control is off and that I was not low on Hydraulic fluid.

I would appreciate any thoughts anyone might have on this issue.
 
   / 3 pt shaking #2  
Are the hydraulic line very hot?
I would not run the tractor long if the lines get hot.
Sound like something is not plumbed right.
How old is the machine and how many hours.
Where you taped the fitting you were careful not to get any tape over the end to create a restriction.
As far as air your tractor has a common resvior and the air will come out of the line real fast.
 
   / 3 pt shaking
  • Thread Starter
#3  
Thank you for your reply. The tractor has just 63 hours (less than two years old). No, the lines are not hot and I used the paste form of sealant starting on the second thread up--so there shouldn't be any restriction from the work I did on the line.
 
   / 3 pt shaking #4  
Is this the first time you had the backhoe off the tractor?
 
   / 3 pt shaking
  • Thread Starter
#5  
No, to this point, I have rarely used the backhoe.
 
   / 3 pt shaking #6  
Have you replaced the hyd. filter with a factory replacement or a cross ref. filter? It seems some have had problems with cross ref. filters.
 
   / 3 pt shaking #7  
Morning JeffBo,
I had similar problems with a friend's Case 885. The 3 pt. was doing as you described before it quit working altogether. What we found with his tractor was a plugged filter. It was covered in sludge and debris (water had leaked into the gearbox through a bad boot on a shifter.) Luckily he had a reusable filter so we scrubbed it down and and put everything back together and filled with new oil. Everything worked fine after that, well, we did have to drain and scrub down the filter once more to get out the remaining sludge and water. I'm not sure how to attach the old threads but if you look in the Case/IH section (I believe it was around 10/15/06) you should find the threads when we were having the same problems. There were some helpful suggestions from others as well.
Not sure if this is related to the trouble you're having but I hope it helps.
 
   / 3 pt shaking #8  
My L185 did the same thing. When I raised the bushhog it would bounce. I don't have a FEL on the 185. Also had a leak. Turns out the fluid was low, I added fluid and it stopped. HAve you check the fluid to see if it is low?
 
   / 3 pt shaking
  • Thread Starter
#9  
Thank you all for your replies. Yes, I did make sure that my fluid level was good (plus, my FEL works fine). I ended up having my dealer take it in for service. Upon further reflection, he thought that I might have a leak in my pump that was letting air in (faulty seal perhaps). I haven't spoken with him today (he picked it up last night), but I also asked him to do a full service (filters, fluids, etc.) just make sure everything gets cleared out. I'll let you know what he finds.
 
   / 3 pt shaking
  • Thread Starter
#10  
I got my tractor back and my dealer showed me the problem. I also came across a post by DavesTractor (while doing a search on this forum for an unrelated topic) from last year that I think fits my situation. The backer ring on my piston was melted. It was an easy fix. Just had to wait for the parts from Branson.
 

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