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  1. #1
    Super Member RobS's Avatar
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    John Deere 790

    Default JD513 Cutter Seal Replacement

    I have a John Deere 513 rotary cutter which has been leaking oil from the output shaft for a while now. Time to replace. Has anyone done something similar? What's involved? The bolt holding the blade holder onto the shaft doesn't look too bad (not as big as I would have guessed). Is the connection tapered, splined or ??? I have various small gear/pulley pullers but nothing too big. Will I need a larger puller of some sort? TIA [img]/forums/images/graemlins/smile.gif[/img]

  2. #2
    Platinum Member
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    1986 Ford 1910 with 770B (FORD) loader, 4 MFWD; 1986 Bolens G214,back hoe,loader,MFWD (Iseki) 21 hp)

    Default Re: JD513 Cutter Seal Replacement

    Try pumping it full grease and add a can or two of a STP knock-off. [img]/forums/images/graemlins/wink.gif[/img] I've got a snowblower and tiller gear box that this has worked on for 4-5 years so far.

  3. #3
    Platinum Member joecdeere's Avatar
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    1948 Allis UC Hi-Crop Cane 1941 Allis WC 1948 Allis G 1948 Allis G 1949 Allis G 1954 Allis G 1959 Ferguson TO-35 1972 MF 135 1979 Power King 2418 1989 Ford 345C TLB

    Default Re: JD513 Cutter Seal Replacement

    Rob, it's not a hard job, after you get the blade holder off.
    It is held on with a 16 x 35 mm bolt @230 ft-lb, so you will need an impact wrench or a good pullbar and cheater pipe.
    After the holder is off, there will be a seal protector and then the seal (DEERE # CE17707)

  4. #4
    Super Member RobS's Avatar
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    Default Re: JD513 Cutter Seal Replacement

    Thanks for the input Joe. Once I get the bolt off will the blade holder fall off or is it a press fit of some sort?

    [img]/forums/images/graemlins/smile.gif[/img]

  5. #5
    Veteran Member BillyP's Avatar
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    Eagletown, OK
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    JD 4610 ehydro MFWD

    Default Re: JD513 Cutter Seal Replacement

    If I'm not mistaken here (and I very well could be). The blade holder is held onto a splined shaft, by way of a nut and cotter pin. Take the cotter pin out, loosen the nut a few turns, start the tractor and engage the PTO. This should loosen the holder from the shaft, if it isn't already loose.

    If engaging the PTO doesn't loosen the holder, you can tap it from the hole in the top of the deck. Use a heavy bar or something, tap one side, turn the holder 180 degrees and do it again.

  6. #6
    Platinum Member joecdeere's Avatar
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    1948 Allis UC Hi-Crop Cane 1941 Allis WC 1948 Allis G 1948 Allis G 1949 Allis G 1954 Allis G 1959 Ferguson TO-35 1972 MF 135 1979 Power King 2418 1989 Ford 345C TLB

    Default Re: JD513 Cutter Seal Replacement

    My parts book shows it as a bolt. It is a splined slightly tapered shaft. Can't tell you how hard it will be to get off. Sometimes one rap with a big hammer gets it loose, and I have seen people have to cut oak wedges to drive under them to loosen them. I'm not a big fan of loosening them up and turning them on, but it has been done. No matter how you loosen it, remember it's about three times as heavy as it looks, so don't let it fall on you, and get help to put it back.
    If you need me to e-mail a parts page to you, just let me know.

  7. #7
    Member arto98607's Avatar
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    Kubota F3060, Grasshopper 721D, Ford 1310, 1959 JD 440 ICD, JD 300

    Default Re: JD513 Cutter Seal Replacement

    Lets see if I can revive this old tread which was pretty handy for me!


    I have John Deere 413 brush hog, which is identical to 513 - only little narrower cut.

    The gearbox was leaking oil and it turned out the output shaft had corroded due to moisture collecting and settling down in the lowest point of the gearbox! The oil seal was actually not damaged at all, only the shaft had bunch of corrosion which caused leaking. I cleaned out the shaft and installed new seal - so far so good.


    I also installed spring loaded JD5801 gearbox vent plug and pan W37716 which should keep the weeds from wrapping up around the output shaft.

    Never did figure out how the water entered the gearbox since this cutter was always parked under cover and the original oil fill plug was a solid steel?


    Blade holder, blades and pan.pdf
    Attached Images Attached Images

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