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Building a custom excavator

Discussion in 'Compact Excavators' started by Coastal, Sep 24, 2017.

  1. Coastal

    Coastal Senior Member

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    Tired of front mounted offset boom machines and their limitations, and a niche market for dh mountain bike trails, as well as sensitive forestry operations, we decided to build the ultimate mini excavator.


    The undercarriage is from a cat 307ssr, the drivetrain and cab is from a John Deere 50d, final drives and 115l fuel tank are komatsu Pc78, the boom is custom built as well as the rest of it.

    ;)


    I'll skip the boring deconstruction cleaning up burned machines phases

    Here is the main upper chassis hanging for welding

    [​IMG]

    Undercarriage mostly fabricated

    [​IMG]

    Oh and it's going to tilt for steep slopes

    [​IMG]
     
    Last edited: Sep 24, 2017
    ITW, Mother Deuce, melli and 2 others like this.
  2. hvy 1ton

    hvy 1ton Senior Member

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    Well this looks interesting. TIme to get some popcorn.
     
  3. Coastal

    Coastal Senior Member

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    Then I got to start painting things

    [​IMG]

    [​IMG]

    After a few weeks of making hydraulic lines, figuring out hydraulic schematics and almost going crazy I got to put the two halves together and make it do funny things

    [​IMG]
     
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  4. Coastal

    Coastal Senior Member

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    Fast forward to this week, it's driving and we've started to do a bit of testing...

    [​IMG]

    Once the tilt rotator and bucket or grapple is on, it should have about 23-24' of reach.

    [​IMG]

    [​IMG]

    And some lifting tests with a 4500lb lock block, relief setting is stock John Deere so we should get some more out of it.

    [​IMG]

    The valves to activate the Tilt cylinders aren't wired up yet, so there is no oil in them, but here's what the tilt looks like on flat ground.

    [​IMG]

    We started this in may, and should be ready to work by mid next week for a test job, I'm getting really excited to get back in a machine and out of this shop!
     
  5. CM1995

    CM1995 Super Moderator

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    That creation is damn impressive. Keep the progress pics and commentary coming.
     
    Coastal likes this.
  6. ycs

    ycs Well-Known Member

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    Good job, u should upload this beast to youtube...
     
  7. 92U 3406

    92U 3406 Senior Member

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    This is the stuff I like to see! The phrase built, not bought just took on a whole new meaning with this beast.
     
    avmac and Coastal like this.
  8. Graham1

    Graham1 Senior Member

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    That is fantastic. If it works as expected you will be so far ahead of the competition in your niche work you will hopefully be overrun with orders. Can't wait to see it in action.
    Graham
     
  9. OTG AuGres

    OTG AuGres Well-Known Member

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    Very impressive!!! Lots of injenuity and talent.
     
    Coastal likes this.
  10. Coastal

    Coastal Senior Member

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    That's also part of the point, I will own this machine outright, no financing, no payments, I will have over 1000 hours into it, but it's mine at he end of the build and that's worth it to me.
     
  11. Coastal

    Coastal Senior Member

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    I will once it's got a bucket on and all the hydraulics are functioning.

    ;)
     
  12. farmerlund

    farmerlund Senior Member

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    North Dakota
    That's a very cool project. Did you start with all salvage machines? Looks like you guys have some excellent fab skills.
     
  13. Coastal

    Coastal Senior Member

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    Yes, 2 burned machines and a rolled over machine. Cheap parts!
     
  14. DARO

    DARO Well-Known Member

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    Looks very nice
     
    Coastal likes this.
  15. Coastal

    Coastal Senior Member

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    Just wired up my electric control valves and it works!

    [​IMG]

    [​IMG]
     
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  16. td25c

    td25c Senior Member

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    Very impressive Coastal !

    That will sure be handy working on slopes .
     
  17. Hobbytime

    Hobbytime Senior Member

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    cool, got a question, what would be the biggest angle of slope you need to climb, and will those shoes give enough bite before loosing grip on the ground? would it pay to weld ice cleats on to bite into the ground to prevent sliding on steep grades?
     
  18. Coastal

    Coastal Senior Member

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    We have cleats in the plan, that's a great point, whether it will be add ons to make it like a single bar grouser or ice cleats has yet to be determined. I just went to another dirt pile to max it out, and see what it would do,and this is the result.


    [​IMG]

    [​IMG]



    As you can see that is a bit more slope than it will level it, but that's pretty extreme, the bucket is full of wet clay and there is no counter weight on the machine but it's surprisingly stable.

    The angle measured there is 30 degrees of tilt with the machine which translates to a 57% slope. I wouldn't want to be in anything steeper than that without winch lines.
     
    ak_snowbear, JNB, melli and 1 other person like this.
  19. Hobbytime

    Hobbytime Senior Member

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    maybe its just my computer, but I dont see any images, just 2 of these[​IMG]
     
    Last edited: Sep 25, 2017
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  20. farmboy555

    farmboy555 Well-Known Member

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    That is looking great, some nice fabricating clean looking job
     
    Coastal likes this.