B2920 Sound

[mhart]

Hey guys
I posted on this a few weeks ago. I have continued to have an odd noise coming from the front of my tractor lately while plowing snow. It seems to be only when tractor is moving, never when idle. Happens in forward and reverse. Tractor has been in 4wd.

The sound immediately stops when I stop moving. The sound resembles the slurpy sound that you hear when drinking a beverage with a straw and you get to the bottom of the cup and you are sucking up drink/air. Sorry but that's the best way I can describe it, Ha!

Any ideas?

 

[C4Ranch]

Loose lug nuts, branch stuck and rubbing something, no oil in front axle?

 

[mhart]

Loose lug nuts, branch stuck and rubbing something, no oil in front axle?

Thanks I will check those. I don't know that much about tractors, just learning as I go. I have only about 120 hours on this tractor. Any reason why the front axle oil would be low? I have not checked that.

 

[C4Ranch]

Is it a new tractor? Dealer didn't fill it? Used tractor, leaking axle seals.

Maybe low coolant or air trapped in the cooling system?

 

[mhart]

Is it a new tractor? Dealer didn't fill it? Used tractor, leaking axle seals. Maybe low coolant or air trapped in the cooling system?

It was purchased new in 2010.

Coolant level seems ok, if air is trapped in coolant system, the sound wouldn't stop as soon as I stop moving would it?

 

[C4Ranch]

If you throttle down when you stop, possibly.

Honestly, I'm just throwing out ideas to check, hard to tell from what you describe

Trying to think of easy, cheap things before the gearing things that are expensive.

Could also be drive shaft... Does your 4ws work?

 

[mhart]

Thanks I appreciate it very much!

4wd works fine. Tractor is performing fine otherwise.

 

[BeezFun]

I'd have someone walk next to the tractor at varying distances to see if they can identify where the noise is coming from. Or you could try putting on ear protection and then taking it off. Sometimes the difference makes it easier to identify a sound. It's most likely a vibration of some sort. I had the weirdest noise on mine, finally discovered it was hood vibrating against frame. I think the best solution is to buy radio ear protectors and turn the volume up so you can't hear anything.

 

[AStanton]

It probably isn't related to motion, but check your belt(s) on the engine. There could be some slack in it now, with the age and hours you have put on the tractor. Especially a new belt.
Good luck.

 

[s219]

Figure out if the noise scales with ground speed at a fixed RPM. That will tell you if it's related to rotation of something in the driveline. If it gets more rapid when you go faster, that's a good indication it's related to rotation of the driveline. If the noise stays the same, it's either related to the engine rotation or a vibration that's keyed into the engine vibration.

My 2920 had a noise coming from the front loader attach pins that only happened when moving and the front loader shook a little. I shot some WD-40 around the pins and the noise went away.