John deere

Cartman · Aug 10, 2015

Looking at a 7410 john deere runs good but makes a lot of noise from under the tractor but it's not the engine was told that is normal for them tractors any info would be great.

donjr · Aug 10, 2015

I have a 6400 and it has a 'rattling' noise under, or in the rear, that is the hydraulic pump. I was told that all of them have
it, especially at low engine rpm's.

GreenEnvy · Aug 10, 2015

Ours did it. Bought it new and put over 5,000 hrs on it before trading it off. Had zero issues with it.

Cartman · Aug 10, 2015

(quoted from post at 21:03:15 08/10/15) Ours did it. Bought it new and put over 5,000 hrs on it before trading it off. Had zero issues with it.

thanks for the help hard to believe they do that.

71ford100 · Aug 10, 2015

I've been around a 7510 that the splines
were worn on the input shaft and the yoke on
the drive shaft and it made a "noise". Never
had any problems.

JD Seller · Aug 10, 2015

Crawl under the tractor with it NOT running and the key in YOUR pocket!!!! There is a short drive shaft from the clutch housing to the front of the transmission. Check it and see if it is lose on the transmission end. They will wear the splines and you have to replace the transmission input shaft and the drive shaft yoke.

Most of them will make noise at dead idle. I set the low idle up on my JD 6400 when it had less than 100 hours on it. That stopped the rattle. If you speed up the RPMS to around 800-900 they should quit rattling if the shaft/spline is still good.

Never could get a few guys to not let them set at DEAD idle rattling because they did not want to waste the extra fuel by idling them up just a little. Well after a $6K repair bill they usually listen!!! LOL

tim s · Aug 11, 2015

I have changed a few yokes on the transmission end and that cleared them up, I haven't had to change a shaft yet, just the yokes..but I think if you ran them long enough with a bad yoke it would hurt the shaft..

Tech 7 · Aug 11, 2015

I have seen and fixed more than a few of these. I have changed out two transmission input shafts without removing the transmission. Not fun but doable (and it wasn't near $6k) I have started to install a grease fitting on the yoke to try and give it a bit more life but haven't had any out there long enough to see if it helps. Of course if no one greases it.......

Bill(Wis) · Aug 11, 2015

The correct answer to the idle rpm is found in a publication that few, if any, bother to read entitled "Operator's Manual". The operator's manual for the John Deere 7410 tractor reads as follows: "Minimum engine speed should be 1200 rpm if engine must idle for more than three or four minutes". It goes on to read: "Before stopping engine that has been operating at working load, idle engine at least 1-2 minutes at 1000-1200 rpm to cool hot engine parts".

John deere

Cartman

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donjr

Well-known Member

GreenEnvy

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Cartman

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71ford100

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JD Seller

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tim s

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Tech 7

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Bill(Wis)

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