NH 477 lunging at low idle

   / NH 477 lunging at low idle #1  

Stu K

New member
Joined
Mar 31, 2021
Messages
13
Location
Missouri USA
Tractor
AC 185, MF 65, MF 165,
Hello,

Just hooked up my 477 haybine to make sure she is ready for the season. Last year I had to replace the drive belt but it ran smooth with no issues. When I ran it this time it seems to be lunging at low idle. At a faster idle is evens out but at low idle the lunge is bad almost like a stop and go motion. I have looked it over and cannot see why its doing this. I removed the belt and I am able to spin the rollers by hand so they seem to be in line.

Is this a timing issue? Any idea on where to start, the chains and belts look good.

Thank you in advance.
 
   / NH 477 lunging at low idle #2  
Hello,

Just hooked up my 477 haybine to make sure she is ready for the season. Last year I had to replace the drive belt but it ran smooth with no issues. When I ran it this time it seems to be lunging at low idle. At a faster idle is evens out but at low idle the lunge is bad almost like a stop and go motion. I have looked it over and cannot see why its doing this. I removed the belt and I am able to spin the rollers by hand so they seem to be in line.

Is this a timing issue? Any idea on where to start, the chains and belts look good.

Thank you in advance.
 
   / NH 477 lunging at low idle #3  
Dirt dobber wasp done set up house somewhere in your machine I bet. Pressure wash and regrease be my first move. Hope it's easy fix.
 

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