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  1. #1
    Silver Member
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    Oct 2007
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    211
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    SW Washington
    Tractor
    JD 3520 w/ 300CX

    Default 3520 drivetrain running hot

    So, was out doing some grading and limb piling on the tractor today. Was out about 4 or 5 hours and while box blading and with my arm behind me while backing up, I could feel the heat coming up from the rear. So, I hopped off and felt the case and sure enough, it was extremely hot. Even the rear arms were hot. So, I let it cool down for a while and went and worked on some other things. After about an hour, it was normal. I checked the fluid, which I do regularly anyway, and it was completely full and nice and clean. It was about 75 degrees out today, so not hot at all.

    So, question for the group, should it have got that hot after that length of time? It was running great and if it wouldn't have been for me noticing the heat coming from it, I would have probably kept on going for another few hours. Now I am little paranoid that something might not be right. Thoughts?

  2. #2
    Super Member
    Join Date
    Feb 2008
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    9,392
    Location
    somewhere usa
    Tractor
    Deere 110tlb, 4520, x749, L130

    Default Re: 3520 drivetrain running hot

    Don't know much about the 3X20 series but would first ask if you have checked the transmission cooler to see if it is blocked? I have never had either of my ehydro tractors warm up to the middle of the green scale.

  3. #3
    Silver Member
    Join Date
    Oct 2007
    Posts
    211
    Location
    SW Washington
    Tractor
    JD 3520 w/ 300CX

    Default Re: 3520 drivetrain running hot

    Thanks for the reply. A couple of more items that might help here. First, it is a PowerReverser, not a hydro. Sorry, I should have mentioned that. Secondly, it was hot enough that it would burn my hand if I would have left it there, but touching it for a second or two was ok. Also, the engine temp was great. Ran cool all day long like it always does. I have 148 hours on it so almost 100 hours since my 50 hour complete service.

  4. #4
    Super Member
    Join Date
    Feb 2008
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    9,392
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    somewhere usa
    Tractor
    Deere 110tlb, 4520, x749, L130

    Default Re: 3520 drivetrain running hot

    If it is that new I would take it in for a check up at the dealer.

  5. #5
    Veteran Member
    Join Date
    Mar 2008
    Posts
    1,499
    Location
    Maine
    Tractor
    Deere 3520 Cab, Deere F935

    Default Re: 3520 drivetrain running hot

    Quote Originally Posted by jenkinsph
    have checked the transmission cooler to see if it is blocked?
    I want to say the PR tractors do not have an oil cooler, only HST machines get the Oil Cooler...

  6. #6
    Super Member
    Join Date
    Feb 2008
    Posts
    9,392
    Location
    somewhere usa
    Tractor
    Deere 110tlb, 4520, x749, L130

    Default Re: 3520 drivetrain running hot

    Quote Originally Posted by Spudland_Dave View Post
    I want to say the PR tractors do not have an oil cooler, only HST machines get the Oil Cooler...
    Yes but the PR transmission wasn't mentioned until the OP's second post.

  7. #7
    Silver Member
    Join Date
    Oct 2007
    Posts
    211
    Location
    SW Washington
    Tractor
    JD 3520 w/ 300CX

    Default Re: 3520 drivetrain running hot

    well, getting it to the dealer is a bit of a chore, so I'll check the filter first. Anyone know if you can change the filter without draining all the fluid first? I would prefer not to have to replace all the fluid since it isn't that old and is very clean from what I can tell. Thanks.

  8. #8
    Veteran Member
    Join Date
    May 2008
    Posts
    1,257
    Location
    Eastern Ia
    Tractor
    JD 4310 eHydro,

    Default Re: 3520 drivetrain running hot

    I would first get a exact measurement of temperature. Use one of those infra-red temp guns and then call the dealer to find out if it it really running hot. Just because you cannot hold on to a working tractors transmission does not mean it has a defect. You cannot hold your hand on your cars transmission after a 4-5 hr drive right?

  9. #9
    Silver Member
    Join Date
    Oct 2007
    Posts
    211
    Location
    SW Washington
    Tractor
    JD 3520 w/ 300CX

    Default Re: 3520 drivetrain running hot

    mfreund I completely agree, which was really the intent of my post here, ie. should I be concerned with it running hot enough not to touch for any length of time? Should the draft links be very hot as well? The problem is have never actually checked this before, so it caught me a little off guard. Thanks for the thoughts though guys, much appreciated.

  10. #10
    Advertiser kennyd's Avatar
    Join Date
    Jul 2003
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    11,826
    Location
    Westminster, MD
    Tractor
    John Deere 4110, 455

    Default Re: 3520 drivetrain running hot

    Quote Originally Posted by mfreund View Post
    I would first get a exact measurement of temperature. Use one of those infra-red temp guns and then call the dealer to find out if it it really running hot. Just because you cannot hold on to a working tractors transmission does not mean it has a defect. You cannot hold your hand on your cars transmission after a 4-5 hr drive right?
    Quote Originally Posted by jeffster View Post
    mfreund I completely agree, which was really the intent of my post here, ie. should I be concerned with it running hot enough not to touch for any length of time? Should the draft links be very hot as well? The problem is have never actually checked this before, so it caught me a little off guard. Thanks for the thoughts though guys, much appreciated.
    It is not unusual or uncommon for hydraulic systems to run at 100* over ambient temperature, and since the tranny case is the fluid reservoir-it will get hot.

    A IR temp probe is cheap and very handy to have around...
    KennyD
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