Grinding Sound !! - Dealer Says NORMAL

   / Grinding Sound !! - Dealer Says NORMAL
  • Thread Starter
#71  
I finally have some info to provide as an update. Here's what's happened since my last post.

The tractor was delivered to dealer on 1/9 for an appointment with the NH rep on 1/15. I heard no update on status, so I stopped by the dealer on 1/16. I spoke to the dealer service mgr. He said, "they found a cracked piece of plastic in the hydraulic system near where the tubing comes together." Not a very technical explanation. He said it was causing air to enter the system, and causing the noise I was hearing. That remains to be seen. They were waiting for the part, so as of today, it is still there. I've looked at schematics and cannot determine the part they may have been talking about. When the service report comes out, or I speak to the dealer on Monday asking for an update, I'll find out the exact part. They are also to change to the colder spec fluid, but that is on back order and will do at my house upon delivery.

A service technician indicated the noise was very evident when they had it in the shop. Whether he meant the lift noise or the HST activated noise, I did not get to ask.

In the meantime, I sent a certified, return-receipt-requested, letter including my issues log, to the home office. I requested a loaner tractor on all future warranty visits to the dealer. I requested that if the tractor is repaired, I want an unlimited extended warranty on the hydraulic/HST system, due to unknown damage that the noise making defect may have caused, and could possibly cause future problems after warranty expiration. If that is unacceptable to them, I've asked for a new replacement tractor, and if that is unacceptable, I've asked for a full refund.

I have spoken to a rep at the home office. I registered a complaint with him, regarding lack of urgency in responding to my problem. He had already received my DVD from the area NH service rep, but had not looked/listened to it yet. I received verbal assurance that the problem would be addressed, but no guarantee that I would be satisfied. I expressed my displeasure with lack of customer satisfaction even remotely being a goal for NH, or the dealer. I explained the options I prefer, as indicated above.

By sheer determination, I have obtained phone numbers for all the pertinent people. If I am not satisfied with the outcome, which includes no response from the person at the home office I spoke to last, I will ask to speak to that person's supervisor, and register my complaints there. I am holding on to the attorney's letter option until these steps are completed, but have that lined up, with a phone call.

Does the fix I'm being told about sound like a reasonable response? I have believed, since gaining input from this forum, that the problem was some sort of cavitation of the hydraulic pump, cause by a restriction or something, but I don't understand the intermittent nature of the noises. Also, I'd like to know if excessive wear could occur during cavitation, or any other problem that may cause long term issues. This investiment was supposed to last me the rest of my life. I don't want expensive repairs, that are not my fault, to be a part of that investment. Any opinions on possible damages are appreciated, and I'll give more data, ASAP. Thanks, folks.
 
   / Grinding Sound !! - Dealer Says NORMAL #72  
If the replaced part is in the main suction line, it could easily account for the problem. A hairline crack in a part, particularly a non-metallic tee that I am thinking of, would allow a temperature and flow sensitive leak creating symptoms in both the hydraulic and hydrostatic systems. Cavitation can cause damaging wear to pumps. It is impossible for anyone responding here to predict to what extent, if any, your hydraulic or hydrostatic pumps and motor have been damaged. Given your diligence to the situation, it is likely that damage is negligible.
 
   / Grinding Sound !! - Dealer Says NORMAL #73  
I concur with Rick B. I doubt the slight cavatation noise has resulted in any damage, especially since the tractor has so few hours on it. I would ask for the "cracked" plastic part for proof of the mishap during assembly. Then take several pictures of the part, post them, and allowing Rick B, and Jinman to comment. This would hopefully ensure that the part is reconized as being what it is suppose to be, and the culprit of the noise. If the dealer, and NH almost force you to keep the machine, you will at least have piece of mind that it is still in brand new shape, without any lasting damage. ;)
 
   / Grinding Sound !! - Dealer Says NORMAL #74  
CNH will probably keep the broken piece, CNH may want it back; if the dealer will not give the piece to you; take your dgital camera with you; take pictures of it, sitting on the repair invoice for confirmation if needed. Also have dealer make a note on repair bill/invoice that pictures were taken of the damaged piece. Make sure invoice states EXACTLY what they did and includes the description of the problem.
 
   / Grinding Sound !! - Dealer Says NORMAL #75  
It sounds like you have gotten to the root of the matter. As several have posted previously, a suction failure can cause cavitation and the noise you have been hearing. Given the vibrations, heat and variations in pressure in a tractor, it being an intermittent air leak is highly likely. Document the fail as others have noted and that should be that.

No one can say how much if any damage has occured due to this issue. My gut feel is that it isn't much damage if any at all. Those parts are pretty bullet proof. But without looking at the transmission all apart, it's a pure guess.

jb
 
   / Grinding Sound !! - Dealer Says NORMAL #76  
I agree with Rick.. cavitation due to a suction side leak is very possible. And I agree also with the damage estimant.. could be anything from NO DAMAGE to IT WILL FAIL TOMORROW. I'm leaning on the low/no damage side.. just from what i have read here..

Soundguy
 
   / Grinding Sound !! - Dealer Says NORMAL
  • Thread Starter
#77  
Bad new for the home team. Changing the part did not stop the noise. The dealer is now going to change some o-rings and other stuff. I'm going by there tomorrow to see if I can get more details on what they replaced, pictures, etc. I'm still not receiving responses from anyone without initiating it. Customer satisfaction is just not a strong suit, IMHO. They don't have a tractor with a FEL for me to use as a loaner...but I will make more phone calls tomorrow. I don't think I've been a pest at all. It may be time....
 
   / Grinding Sound !! - Dealer Says NORMAL #78  
MoyockHeel said:
Bad new for the home team. Changing the part did not stop the noise. The dealer is now going to change some o-rings and other stuff. I'm going by there tomorrow to see if I can get more details on what they replaced, pictures, etc. I'm still not receiving responses from anyone without initiating it. Customer satisfaction is just not a strong suit, IMHO. They don't have a tractor with a FEL for me to use as a loaner...but I will make more phone calls tomorrow. I don't think I've been a pest at all. It may be time....

Since they are still in the "replace a part" then see if it works mode they most likely will not be willing to communicate freely. No service facility likes to admit that they really don't know what the real problem is.
 
   / Grinding Sound !! - Dealer Says NORMAL #79  
My tc40d as someone posted before had a stick get in between the cover for the front wheel drive shaft and the frame it sounded like the tractor was having major problems till it was removed .Just a thought. I feel the dealer and nh will get ya fixed up they just have to get to the problem.My tractor had a few bugs leaks and small stuff it took awhile to get them worked out.I would be persistant and it will work out.
 
   / Grinding Sound !! - Dealer Says NORMAL #80  
That squealing stick thing .. I've seen that. my NH 7610s did that once, as well as getting a stick sucked into the enging compartment and was rubbing on the fan belt. ( i had to replace the fan belt.. it frayed it a little )

Soundguy
 

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