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Thread: Section for komatsu d20,21 and similar grey market dozers

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    Exclamation Section for komatsu d20,21 and similar grey market dozers

    I created this thread to hopefully discuss komatsu dozers, in order to help people like myself that have a komatsu dozer and have questions about them.
    Last edited by rangerfreak; 06-04-2007 at 03:11 PM. Reason: sentence error

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    Senior Member wrenchbender's Avatar
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    Welcome rangerfreak

    Welcome aboard rangerfreak , I'm not a Komatsu expert but there are a few guys here that do qualify. So fire away and someone will probly answer all your questions.
    Whatever you do make it count life's short enjoy it!

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    thank you for your warm welcome

    im loving this forum its been a big help

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    Welcome

    Hi, n00b here too!!!

    FWIW, I have a D20-P6. Just bought it about 3 weeks ago...I have both the repair and the operation/service manual. I'm by no means any sort of expert but, if you have any questions you think might be covered in the manuals, I may be able to find the info and answer them.

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    question about dip stick

    on my new dozer or should i say used dozer there 3 dipsticks one is under the hood which i know is the oil stick, then there is one right underneath the seat what is this one?and what is the one underneath the brake peddle on the right.Also what specific fluid should i use on each one.
    thank you for your time and have a nice day

    P.S how do i tighten my tracks

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    Quote Originally Posted by rangerfreak View Post
    on my new dozer or should i say used dozer there 3 dipsticks one is under the hood which i know is the oil stick, then there is one right underneath the seat what is this one?and what is the one underneath the brake peddle on the right.Also what specific fluid should i use on each one.
    thank you for your time and have a nice day

    P.S how do i tighten my tracks
    Rangerfreak,
    All my documentation is at home, I'll look at the manual and post the exact answers for you this evening.

    I do know that the hydraulic system does NOT use regular hydraulic fluid.

    Take care,
    Randy


    PS - I ordered my Operation/Service manual from this outfit: www.manuals.us
    The repair manual came with the dozer (the prior owner had bought it)

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    need to know how to tighten tracks

    Was wondering how to tighten my tracks on my komatsu d20A-5

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    iv been useing regular hydraulic fluid

    is this bad iv heard that 10w-40 motor oil is a choice but i have been using regular ro anti wear hydraulic fluid

  10. #10
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    Quote Originally Posted by rangerfreak View Post
    Was wondering how to tighten my tracks on my komatsu d20A-5
    Right. I'll scan the pages and post them for you when I get home.

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    Super Moderator Orchard Ex's Avatar
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    Quote Originally Posted by rangerfreak View Post
    on my new dozer or should i say used dozer there 3 dipsticks one is under the hood which i know is the oil stick, then there is one right underneath the seat what is this one?and what is the one underneath the brake peddle on the right.Also what specific fluid should i use on each one.
    thank you for your time and have a nice day

    P.S how do i tighten my tracks
    One is the transmission and the other is the clutch.
    To tighten the tracks: take off the access plate on the track cover, put your grease gun on the zerk and pump to tighten the tracks. Go slow, it doesn't take very much.

    I think that the book says 30w oil in the trans, finals and transfer case (D21), 10W in the clutch and hydraulic tank.

  12. #12
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    Smile Komatsu D21

    Howdy guys
    I am a new owner of an old Kom D21P-6. Been pushing a lot of brush and smaller trees with it. It runs mighty good. I can't make new posts yet.
    I just bought a new hydraulic filter for it today. Can't get one from anywhere but Komatsu ... but all other filters are available from normal sources.
    I have ordered all the manuals from SSB Tractor.
    So far, I have changed all fluids and filters.
    Welded on it for 3 days.
    Adjusted all linkages.
    Installed a new coolant temp gauge and an oil press gauge.
    Rewired some stuff on it.
    Adjusted the tracks by the book.
    Been told I got screwed when I bought it.
    Found out I can't find another one anywhere around here and the guy who said I got screwed wants to sell me one for over twice what I paid for this one....ha ha ha ha ha ha......the jerk!!!!!
    So far, it has done really well for me, but then, I never even ran one before, so can't really compare it with anything, but my tractor...ha ha
    Hope to see more posts about these machines.
    Thanks, Pete in MS

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    Founder Steve Frazier's Avatar
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    Welcome to Heavy Equipment Forums kc5gxc!!

    I've upgraded your account so you may start threads now. Thanks for joining us!!

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    question newbie here

    Quote Originally Posted by Orchard Ex View Post
    One is the transmission and the other is the clutch.
    To tighten the tracks: take off the access plate on the track cover, put your grease gun on the zerk and pump to tighten the tracks. Go slow, it doesn't take very much.

    I think that the book says 30w oil in the trans, finals and transfer case (D21), 10W in the clutch and hydraulic tank.
    (there is a finals dip stick too as well as a transfer case dip stick along with a transmission dip stick as well?)
    Last edited by Countryboy; 06-06-2007 at 12:10 AM. Reason: Fixed quote tags.

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