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  1. #1
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    Default ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    The zerk at the top of my LA724 loader's rollback cylinder broke off, & I'm having a fit trying to find a replacement.

    No problem with the threads; It unscrewed right out. Took it with me to match it up. Tried Tractor Supply, Discount Auto Parts, Home Depot, & finally ... my kubota dealer (way across town). Believe it or not even they didn't have it.

    So, today I took the broken one back into Home Depot to at least determine the thread size. Tried 5/16" coarse thread: Nope. Tried 5/16" fine thread: Nope. Tried 8mm metric: Nope. But wait ... Upon closer look, they have both 8mm 1.0 thread & 8mm 1.25 thread ... Wah-lah, at least I now know it's 8mm 1.25 thread.

    Now ... where to get an 8mm zerk with 1.25 threads???

    Anybody?

    (Due to miles traveled, this is gonna end up being the most expensive thing on the tractor, by weight anyway)

    Edit: Broken zerk takes a 9mm socket

    Edit 2: The OEM zerk appears to be straight threads, not tapered. And it does screw all the way down into an 8mm 1.25 thread nut I got from HD

  2. #2
    Veteran Member David_Kb7uns's Avatar
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    Willamette Valley Oregon
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    Kubota X 4

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    I got both the SAE and Metric grease fitting kits at Harbor Freight and they have fit most things on the L3130 with a LA723 and a Bradco backhoe. Not sure what my loader cylinders have, most of the tractor is Metric and alot of the loader fittings were SAE. To make things worse they use both bolt thread pitches and pipe thread for different fittings and sometimes some of the metric are so close to SAE that it is easy to cross thread them.

    Just went and checked the kit and it has several 8mm and they are 1.25 pitch, checked with my threading kit.

    David Kb7uns
    Grand L3130GST LA723 Loader, ATI grapple, ATI grapple bucket, WR Long front remote, Kubota rear remotes, Bradco 408 Backhoe with thumb, 60"KK brush hog, 60" RM Finish Mower, Speeco Post Auger, 72" KK rear blade, 60" box blade
    BX2230 LA211, RCK60, GCK60 Bagger,42"Land Pride Tiller, XB BB, XB RB, rake, Fimco 3PT sprayer
    G2160 RCK60 Mower
    RTV1100 Orange, Work Lights, Front Rear Winch,Rear Screen, High Mount air cleaner, water seperator
    2010 Polaris RZR 800 S
    2007 CAN AM Outlander 800 LTD

  3. #3
    Elite Member CurlyDave's Avatar
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    Grants Pass, OR
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    JD TLB 110

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    I got an American assortment of grease zerks and a Mertic assortment from Harbor Freight about a year ago. So far, so good. They have had every one I have needed.
    40 Acres on a hill - fantastic view. JD 110 TLB, 4-n-1, 12" bucket, 18" bucket, Addington thumb, rock bucket (doubles as root grapple)

    Not only do we not understand the universe, if someone explained it to us, we would not know what he was talking about.

    Isaac Asimov

  4. #4
    Veteran Member dstig1's Avatar
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    W Wisc
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    Kubota L5240 HSTC, (Kubota L3130 HST - sold)

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    M8x1.0 is the fine Metric and it is rare (at least in bolts). You should be happy is it M8x1.25. That should be something you can find... Pretty common metric thread size. M6 and M8 are pretty common sizes.
    -Dave

    "Being a pessimist is great. You can't lose. Either you end up being right...or you are pleasantly surprised."

    L5240HST, QA, 824 Loader, 48" Forks, 48" Grapple, rear blade, box blade, landscape rake, Ancient Farmi Skidding winch
    Trailer - 10k/16' twin axle w/elec brakes
    2005 F250 5.4V8(3V) 3.73/4wd tow vehicle

  5. #5
    Gold Member
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    Rutledge, GA
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    Kubota L3710DT

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    Try these folks:

    McMaster-Carr

    Scroll down to next page link and click, the metric stuff is on that page.

    Good luck

    SimS

  6. #6
    Elite Member gwdixon's Avatar
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    Northern CA

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    Go to a local auto supply store (not a cheap chain operation) and they should have it. Napa is usually pretty good.
    2009 Kubota M7040, R1s, LA1153 FEL, fork lift, 3 rear remotes, T&T
    2002 Kubota L48 TLB, 12", 18", 24" HD buckets
    2001 Kubota BX2200, Turf, LA211 FEL
    7.5' Howse 3PT disc, 88" Gearmore 4G4 box scraper, 4' box scraper, Gearmore GB85 blade, LandPride RCR2596 cutter, 6', 4' flail mowers, 6', 4' rototiller, 4' Bush Hog cutter, HD subsoiler, Bearcat 70554 chipper, Bush Hog PHD w/ 12", 6" augers, Ford 101 3-bottom plow, 8' land leveler, 6' rake, lots of misc.

  7. #7
    Veteran Member kevinj's Avatar
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    BX-1860, L3940HSTC, B7500, Farmall M, Farmall 560D

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    Quote Originally Posted by gwdixon View Post
    Go to a local auto supply store (not a cheap chain operation) and they should have it. Napa is usually pretty good.
    I found mine at NAPA also, dealer did not have and said "we buy them at NAPA"
    Kevin

    BX1860, mower, snowblower - B7500HST, FEL, Bush Hog - Grand L3940 HSTC, FEL, snowblower, 6' Landpride brush hog, 6' King Kutter tiller, Corn Pro 18+5 Fifth Wheel, 1950 Farmall M, Farmall 560D

  8. #8
    Super Member
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    JD2010, Kubota3450,2550, Mahindra 7520 w FEL w Skid Steer QC w/Tilt Tatch, & BH, BX1500

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    I only have an American set and no need for excess. The 5/16 screws into the 8 mm fine .. the threads interfere but grease fitting engagement is short so actually they bind up nicely as they seat ... if they bind too much too soon a little moly is all thats needed. 1/4" size crossover just takes a 1/4x28 plug tap run in a thread or 2 and alls well. Grease fittings arent rocket science.
    larry
    This side of 40
    JD2010, Kubota L3450/FEL w SK QC, L2550 w FEL
    Mahindra 7520 [Pinky] /FEL w Skid Steer QC/w Tilt Tatch & BH, BX1500 [Mighty Mouse]
    IH37 Baler, CCM165 Drum Mower, JD Rake
    JD 127 bushog, Flail, SK Tilt Tatch , KK tiller, Rhino rear blade, Post driver, post auger, chipper, pallet fork, Grapple/Loader Buddy, Homemade Splitter/DC Welder

  9. #9
    New Member
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    Jul 2010
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    L4400, L4300, L3400, L3450, L5030, L4610

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    got my metric assortment at Kragens and they always work in 40 and 50 L series tractors. (Kragens now called O'reillys). doesn't matter if you had straight thread, the tapered will just go in easier.

  10. #10
    Veteran Member kevinj's Avatar
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    BX-1860, L3940HSTC, B7500, Farmall M, Farmall 560D

    Default Re: ARGH! Broken zerk grease fitting for L3940 HARD TO FIND

    Quote Originally Posted by SPYDERLK View Post
    Grease fittings arent rocket science.
    larry
    On this series kubota loader some of them are extended by about a 1/2".

    Those are a bit harder to find. The ones I got were a little short and that makes it tough to get the gun off as the zerk is recessed.
    Kevin

    BX1860, mower, snowblower - B7500HST, FEL, Bush Hog - Grand L3940 HSTC, FEL, snowblower, 6' Landpride brush hog, 6' King Kutter tiller, Corn Pro 18+5 Fifth Wheel, 1950 Farmall M, Farmall 560D

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