Hesston 6450 swather

craigco · Sep 24, 2022

I have a hesston 6450 swather with a 6465
auger head. I am getting a loud growling
sound while cutting with it. Intermittent
can be in light hay or heavy may cut 2
passes no noise or every 40 feet growls
away. If you pull it in reverse and take
the load off it stops. I have a sprocket
for the top roller for the crimper that
is worn and is shiny below the teeth from
the chain riding deep in it. Ordered one
to replace it. Could that be the noise I
am getting? I don't see any other new
shiny metal from parts wearing and all
bearings seem to be good. Just wanting
other suggestions to look for if someone
else has dealt with similar issue.
Thanks.

dcarp · Sep 25, 2022

Cant speak to the particular model but my go to for bearings is a laser thermometer. Run the unit for about 10 min and then while its still running, check the temperature of the bearings. The one significantly hotter than the others needs to be replaced.
Prices for the laser thermometers are fairly low. Think I paid about $20 for mine.

used red MN · Sep 25, 2022

So with the header off you get no noise? Trying to rule out the drive system as being the problem. I do not quite follow what you mean about the chain sprocket. Are you saying the chain links are wearing an impression below the teeth bottoms on the side of the sprocket? If so that is more of a sign of it running out of alignment. Hopefully you know it is important to replace the chain when you replace the sprocket. Any time you have a chain off you should check for wear by wrapping it around the sprocket and squeeze the ends together with your hand. You should not be able to pull the chain away from the sprocket but maybe a 1/16 of an inch on the opposite side of where you are holding the chain together. When chain wears it starts to only pull on one tooth of the sprocket and starts wearing sprockets quickly. You say the bearings ..appear.. okay. You have to get in there with a crowbar and pry on the rollers to see if you can get movement out of them I am just guessing the machine has a crimper or conditioner on it. The suggestion on using the laser IR gun is a very good one.

caterpillar guy · Sep 25, 2022

On some mower conditioners if the rolls are not timed correctly they will make noise. I know our 1219 if they get off they will grumble some.

craigco · Sep 25, 2022

Thanks yes I have new chain ready for when the sprocket arrives. It is wearing below the teeth. Earlier this year I found a bad idler sprocket that was wore and the chain was cutting into the sprocket body. Replaced sprocket and chain and quieted that down. I have pried with bar on bearing locations and don't get movement. Not sure on timing of the rollers they currently are set about 1/4 inch apart, not touching. Way it was when I got it. The sprocket I suspect was a problem for someone else as it had been welded to the shaft. Got about 10 acres left.

Hesston 6450 swather

craigco

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dcarp

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used red MN

Well-known Member

caterpillar guy

Well-known Member

craigco

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