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  1. #1
    Gold Member
    Join Date
    Jun 2006
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    330
    Location
    NW WA State
    Tractor
    1980 AC 5020

    Default Adding grease zerk fittings....

    The AC 430 FEL on my AC 5020 has not one grease fitting. Would these be hard to install? The real question being how hard will it be to drill the holes for the fittings? Should I drill the cylinder ends, or the pins? Make grooves or hope the grease just works it's way around the pin?

    Thanks,
    Monte

  2. #2
    Super Member 3RRL's Avatar
    Join Date
    Oct 2005
    Posts
    6,807
    Location
    Foothills of the Giant Sequoia's, California
    Tractor
    55HP 4WD KAMA 554 and 4 x 4 Jinma 284

    Default Re: Adding grease zerk fittings....

    Hopefully you have a good drill press to drill on. That would make it a LOT easier than hand drilling.
    By cylinder ends, I presume you mean the end allows the pin to slide though it. If so, that would be the easier place to drill and tap for the Zerk. If you decide to drill the pin, you'd have to do it from an end and then cross drill it to where the grease could get to the bushing part. Grease grooves are always better (although both will work) since they allow a body of grease to accumulate and wick into the space between the hole and pin.
    Rob-
    ...The Older I get...the Better I Used to be...
    Member of the Month

  3. #3
    Super Member
    Join Date
    Sep 2000
    Posts
    6,515

    Default Re: Adding grease zerk fittings....

    Quote Originally Posted by montejw
    The AC 430 FEL on my AC 5020 has not one grease fitting. Would these be hard to install? The real question being how hard will it be to drill the holes for the fittings? Should I drill the cylinder ends, or the pins? Make grooves or hope the grease just works it's way around the pin?

    Thanks,
    Monte

    If you have no fitting on the loader, then they were originally in the ends of the pins. Typically, the pins are drilled from one end and a cross hole is in the center of the pin to lubricate the cylinder bushing. The other end of the pin has a rotation stop (usually a bolt). The pins are either surface hardened or completely hardened after machining. 4140 is a common alloy easy to machine and easy to harden.

    If your pins have no zerks, not even broken off ones and there are no other zerks, you should check the condition of the bushings. They may be worn quite a bit from lack of love. Bushings are expensive. Have fun.

    jb

  4. #4
    Gold Member
    Join Date
    Jun 2006
    Posts
    330
    Location
    NW WA State
    Tractor
    1980 AC 5020

    Default Re: Adding grease zerk fittings....

    Quote Originally Posted by john_bud
    If you have no fitting on the loader, then they were originally in the ends of the pins. Typically, the pins are drilled from one end and a cross hole is in the center of the pin to lubricate the cylinder bushing. The other end of the pin has a rotation stop (usually a bolt). The pins are either surface hardened or completely hardened after machining. 4140 is a common alloy easy to machine and easy to harden.

    If your pins have no zerks, not even broken off ones and there are no other zerks, you should check the condition of the bushings. They may be worn quite a bit from lack of love. Bushings are expensive. Have fun.

    jb
    No zerks, and as far as I can tell it never had any. There's a bit of play in the bucket, but not bad, just don't want it to get worse. I'll have to take a cylinder or 2 off and see what's inside.

    Already having fun, 4wd, already have both axles off in front, bearings on the way from Wisconsin, or somewhere like that.

    Monte

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