JD 3720 cab noise

DP Property · Sep 27, 2011

Just wondering if all the squeaky noise in the cab with every little bump I hit is normal in the 3000 cab series? I got the steering wheel squeak sorted out with a washer but the cab itself really makes lots of squeaky sounds on every little bump I hit. Kind of annoying on a machine that cost so much hard earned money.

tomd999 · Sep 27, 2011

Hi,

Did you re-torque the cab mounting bolts as specified in the manual? I think it calls for that around the 15 or 20 hour mark.

Tom

kennyd · Sep 27, 2011

I have heard wiping a silicone based lubricant (spray on rag, then wipe on) on all the door seals will help some of the noise.

DP Property · Sep 27, 2011

tomd999 said:
Hi,

Did you re-torque the cab mounting bolts as specified in the manual? I think it calls for that around the 15 or 20 hour mark.

Tom

Hi Tom I did not know this have not read entire manual yet but I just hit 20 hours. Will look into this for sure.

DP Property · Sep 27, 2011

kennyd said:
I have heard wiping a silicone based lubricant (spray on rag, then wipe on) on all the door seals will help some of the noise.

That would make sense also will look for a silicone based lubricant that won't damage the seals.

radman1 · Sep 27, 2011

Should not be having cab squeaks. Had JD 3720 and now 4520 but no cab squeaks. Try is isolate where the noise is. The door could be a common location and the door latch can be adjusted. Is is the mounting bolts? Something rubbing on the cab?

sunnyside360 · Sep 27, 2011

No squeaks here ----- 3720 cab tractor bought new in 2007. Wish I could help but the aforementioned suggestions sound like good ideas.

I should add that my door latches are adjusted such that the doors have to be slammed/pushed hard to latch.

greg_g · Sep 27, 2011

My steering wheel squeaked badly, but that's since been fixed under warranty. Yours however sounds like door seals, but that's just a guess. You might see if tightening the latches helps. My cab is so air tight that I have to have the left door open before the right door will latch.

//greg//

sunnyside360 · Sep 28, 2011

greg_g said:
My cab is so air tight that I have to have the left door open before the right door will latch.
//greg//

Yep, same here. :thumbsup:

DP Property · Sep 28, 2011

I have 20 hours on the machine now but seriously out of all the machines I have that hour meter is fast I am sure of it! I did the door test you guys just made me head out in the dark to the new shelter for the tractor and same thing here. I had to open the left door could not make the right door latch for the life of me.
Not sure where the cab bolts are that I guess should be retightend at 20 hours but will check the manual tonight. My seals all seem good cab just squeaks I think more at higher speeds when you hit bumps. This machine is new even checked the serial number on the motor the motor was built only 2 months ago. It can't be anything major maybe I am being to critical.

DP Property · Sep 28, 2011

Built a home for the 3720
shelterlogic at Canadian tire $699.99 I really like- makes my front look neater also and I am sure the neighbours appreciate that also.

DP Property · Sep 28, 2011

Playing around in my driveway - it is small don't laugh guys... video will make most of you fall asleep....

New John Deere 3720 Cab - YouTube

Henri88 · Sep 28, 2011

Have watch the video and have not fallen asleep.

Real nice machine, however, I notice that you were doing the job at full RPM (2900). You may have your reason, but if not I would suggest a lower RPM. 2300 is usually fast enough to do the job you were doing. I never or rarely go over the PTO limit. JMO. :thumbsup:

DP Property · Sep 28, 2011

Henri88 said:
Have watch the video and have not fallen asleep. Real nice machine, however, I notice that you were doing the job at full RPM (2900). You may have your reason, but if not I would suggest a lower RPM. 2300 is usually fast enough to do the job you were doing. I never or rarely go over the PTO limit. JMO. :thumbsup:

Ok thanks good pointer and I should go easy on the new engine.

Glen Watkins · Sep 29, 2011

Gotta love these cabs. WOT and can enjoy the tunes beside! I leave my back window unlatched so the doors can be closed easier.

nwltruck · Sep 29, 2011

I have a '07 3320 and mine has the same noise. I'm thinking it's the cab bolts but haven't had time do dig for them. If you find the problem please post. I'll do the same. We'll just have to see who gets the time first .........

DP Property · Sep 30, 2011

nwltruck said:
I have a '07 3320 and mine has the same noise. I'm thinking it's the cab bolts but haven't had time do dig for them. If you find the problem please post. I'll do the same. We'll just have to see who gets the time first .........

ok but has your cab had the noises on bumbs ever since you have owned it or did it start at a later date? I only have 22 hours on mine now and will try today and find out where the cab bolts are and what they should be tourqued to.

tomd999 · Sep 30, 2011

Hi,

The bolt locations are shown in the back of the owners manual. I think the torque is right around 125 ft/Lbs

Tom

jenkinsph · Oct 1, 2011

Nice new tractor congratulations.:thumbsup:

Have to agree with Henri about the 2900 rpms' is way too fast, I do that sort of work at 1500 to 1800 rpms.

FWIW, it looks like you were spreading 3/4" gravel, I have found that it is best to use base course with 3/4" to fines and pack that in first. Then put a layer of clean 3/4" gravel on top about one rock high. This way you don't have all the tracks in your driveway. Too much clean gravel on top and the vehicles are constantly plowing through the gravel.

DP Property · Oct 1, 2011

DP Property said:
ok but has your cab had the noises on bumbs ever since you have owned it or did it start at a later date? I only have 22 hours on mine now and will try today and find out where the cab bolts are and what they should be tourqued to.

jenkinsph said:
Nice new tractor congratulations.:thumbsup:

Have to agree with Henri about the 2900 rpms' is way too fast, I do that sort of work at 1500 to 1800 rpms.

FWIW, it looks like you were spreading 3/4" gravel, I have found that it is best to use base course with 3/4" to fines and pack that in first. Then put a layer of clean 3/4" gravel on top about one rock high. This way you don't have all the tracks in your driveway. Too much clean gravel on top and the vehicles are constantly plowing through the gravel.

ok thanks not used to the new machine yet thought for the loader work should be higher but I guess the load match takes care of that a really nice feature.