1830 hi/lo not working
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Thread: 1830 hi/lo not working

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    1830 hi/lo not working

    Hello everyone,

    This is my first post here, I don't know if I am in the correct section or not. Sorry if it is the wrong one, but I think the hi/lo works off hydraulics?

    I have a John Deere 1830, everything works great on it, except for the hi/lo shift. It works perfectly in lo, but when I put it into hi it makes a whinning spinning sound, I not really sure how to describe it, no grinding or anything like that, but as if something is spinning and not catching what it is supposed to. I also am not really sure how the hi/lo system works. I should also state that SOMETIMES after the tractor warms up the hi/lo shift works. If anyone has any ideas of what it could be and how to fix it, I would be grateful. Thank you in advance.

    Jamie

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    Zebrafive's Avatar
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    This is the correct section for an 1830 tractor

    Hi/LO is hydraulically powered. It's powered by the transmission pump.

    Easy things to check are:
    Hydraulic oil level and condition (clean not milky or dirty)
    Transmission oil filter
    Transmission sump screen

    Harder:

    Transmission oil filter bypass valve (check for stuck open, bleeding off transmission pump pressure)
    System pressure (there is a test port on the right side of the HI/LO control valve) Control valve is in the part the gear and range shifters are in. Bolts top of clutch housing.

    If everything check OK, then it could be the HI clutch is worn out, it's a multi plate wet clutch pack.

    Do you have an Independent PTO? That also operates off the transmission pump.
    Last edited by Zebrafive; 04-01-2018 at 10:35 PM.
    J
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    Welcome to GTT
    I'll add to what Zebrafive stated that trans pump pressure should be in the 155-165 psi range. Trans sump screen(key 30) & hyd filter relief valve(key 26) can be accessed on RH side of tractor.
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    Last edited by Tx Jim; 04-02-2018 at 07:09 AM.
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    Zebrafive's Avatar
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    Thanks Tx Jim, I was not sure of the pressures. Can you post the test port, on the right side of the shifter housing?

    If he has Ind PTO with leaks, that could also rob the Hi/Lo of pressure.

    When trans fluid gets low in my 2030, the Hi/Lo will slip when going up steep hills.
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  8. Top | #5

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    IIRC test port is plug(key 8)
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    Quote Originally Posted by Zebrafive View Post
    This is the correct section for an 1830 tractor

    Hi/LO is hydraulically powered. It's powered by the transmission pump.

    Easy things to check are:
    Hydraulic oil level and condition (clean not milky or dirty)
    Transmission oil filter
    Transmission sump screen

    Harder:

    Transmission oil filter bypass valve (check for stuck open, bleeding off transmission pump pressure)
    System pressure (there is a test port on the right side of the HI/LO control valve) Control valve is in the part the gear and range shifters are in. Bolts top of clutch housing.

    If everything check OK, then it could be the HI clutch is worn out, it's a multi plate wet clutch pack.

    Do you have an Independent PTO? That also operates off the transmission pump.

    Hey everyone,

    It has all new filters, fluids and the screen is clean. I will have to check the "harder" things you mentioned this weekend. If the transmissions oil filter bypass valve is stuck, how do I check that?

    Yes, It does have Independent PTO.

    Thank you everyone for your responses!! Much appreciated!!
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    Put a pressure gage in test port, start tractor and read standby pressure, should be 155-165 psi. shift hi/lo to hi and watch what gage does and read pressure. If you have pressure below 150 i think the hi/lo shift lever will jump back into low. I have a 2940 with hi/lo and the check should be done with engine at 1500 rpms in the 2940 manual.
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    To determine if hyd filter relief valve is stuck one needs to disassemble valve to see if valve is stuck in trans case. Valve should move freely.
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    In the drawing, post #5, the test port for the Hi/LO is key 8, there is more than one key 8. You want the one in the middle of the drawing.
    It is on the right side of the shifter housing.

    There are two more test ports on the top of the shifter housing, one is to the left of the right shifter it is the PTO clutch. Forward from that port is the port for the PTO brake. These should test same pressure as the port for the HI/LO. Of course you need to move the PTO lever to engage to test the PTO clutch pressure, and disengage to test PTO brake pressure. If either does not read correct pressure (as in low) you have an internal leak. As stated earlier, if there is a leak in the PTO hydraulics, it can rob pressure for the HI/LO.
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    J
    John Deere 2030 w/245SL Loader
    John Deere 6415 w/640SL Loader
    John Deere 285 50" deck Stolen May 2017
    John Deere x485 62" deck AWS
    Kawasaki Mule 2510 4x4 bought new 1996
    Ford F250 4x4 bought new 1978

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