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  1. #11
    Super Member Tx Jim's Avatar
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    Jan 2007
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    5,062
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    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: John Deere 310 A hydraulics quit!

    Quote Originally Posted by Johnpaul View Post
    Where is the engine disconnect clutch?
    Engine disconnect clutch is located right behind the flywheel. The frt hyd pump has nothing to do with tractor moving/not moving. It is possible one of the gears in the trans pump(charge) broke(2nd photo). Block on RH side is the reverser control valve(3rd photo). Does tractor have a pto?
    Attached Thumbnails Attached Thumbnails -m20039_________un01jan94-gif   -tp12720________un01jan94-gif   -tp41786________un01jan94-gif  

  2. #12
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
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    17,910
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: John Deere 310 A hydraulics quit!

    Did you mean that all hyd quit, including the implement pump for the loader and 3pt?

    Maybe you mean the hyd drive train.

    Does your engine still run?
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  3. #13
    New Member
    Join Date
    Apr 2013
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    8
    Location
    Wa
    Tractor
    John Deere 310 A

    Default Re: John Deere 310 A hydraulics quit!

    Quote Originally Posted by DT86 View Post
    I was thinking he meant the pump/engine disconnect.
    Well, I put new filters on and cleaned the pickup screen, which did not appear very plugged at all.. No change in the issue...no hydraulics or forward/reverse what so ever. Hard to know if the input shaft to the hydraulic pump is actually ok or not. The fact that no forward/reverse is still the question that the pump is even the question. How do I check the low pressure supply from the tranny area?

  4. #14
    New Member
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    Apr 2013
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    8
    Location
    Wa
    Tractor
    John Deere 310 A

    Default Re: John Deere 310 A hydraulics quit!

    To determine a broken gear requires the tractor to be split in 2 and exposed. Not sure that would be in the budget or the under taking. Any other tests of determining whether the low pressure supply is reaching the hydraulic pump?

  5. #15
    Elite Member DT86's Avatar
    Join Date
    Dec 2010
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    3,255
    Location
    SW VA
    Tractor
    Kubota 9540, RTV 900 and David Brown 885.

    Default Re: John Deere 310 A hydraulics quit!

    Quote Originally Posted by Johnpaul View Post
    To determine a broken gear requires the tractor to be split in 2 and exposed. Not sure that would be in the budget or the under taking. Any other tests of determining whether the low pressure supply is reaching the hydraulic pump?
    You can put a gauge on the low pressure supply to the big pump. I had to do that on my 2355 once. I don't know what the pressure should be however.

  6. #16
    Super Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    5,062
    Location
    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: John Deere 310 A hydraulics quit!

    Trans pump pressure should be 165 psi. Pressure can be checked on shift valve that's located on RH side in my 3rd photo from previous post.To check condition of drive clutch I suppose one could remove the clutch housing cover,VERY CAREFULLY bump engine over and see if input shaft is moving.

    DOES your tractor happen to have a PTO??

    I have limited experience diagnosing JD industrial tractor failures but a lot of experience on JD agriculture tractors which however have a few differences
    Attached Thumbnails Attached Thumbnails -tp6529_________un01jan94-gif  
    Last edited by Tx Jim; 04-19-2013 at 07:49 AM.

  7. #17
    Gold Member
    Join Date
    Nov 2011
    Posts
    273
    Location
    Canton, TX
    Tractor
    JD 301A and yanmar YM2500

    Default

    The 301 and 310 are based on the jd 1020 ag tractor and share most of the test procedures and psi ranges.

  8. #18
    New Member
    Join Date
    Apr 2013
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    8
    Location
    Wa
    Tractor
    John Deere 310 A

    Default Re: John Deere 310 A hydraulics quit!

    No pto , it has a permanent backhoe

  9. #19
    Gold Member
    Join Date
    Nov 2011
    Posts
    273
    Location
    Canton, TX
    Tractor
    JD 301A and yanmar YM2500

    Default

    I have a 301a and lost all hydraulics when the loader valve failed internally. Might be worth checking the return to make sure it isn't flowing with no controls engaged. The tractor has a closed center main system that can suck all available fluid from the oc charge pump.

  10. #20
    Elite Member
    Join Date
    Sep 2009
    Posts
    4,316
    Location
    Murray, KY
    Tractor
    265 MF / JD 310B Backhoe

    Default Re: John Deere 310 A hydraulics quit!

    Quote Originally Posted by medic0648 View Post
    I have a 301a and lost all hydraulics when the loader valve failed internally. Might be worth checking the return to make sure it isn't flowing with no controls engaged. The tractor has a closed center main system that can suck all available fluid from the oc charge pump.
    Since FEL use was last action before failure your experience could apply in this case too.

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