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Should I take on this project? 50s Cat D4

Discussion in 'Dozers' started by Lumberjack Matt, May 14, 2021.

  1. Old Magnet

    Old Magnet Senior Member

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    Looks to have tilt cylinder blade plus original Medford cage.
     
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  2. Sam1734

    Sam1734 Well-Known Member

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    Video please …lol
     
  3. Sam1734

    Sam1734 Well-Known Member

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    Make a recovery video
     
  4. Sam1734

    Sam1734 Well-Known Member

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    I just got this ole girl ready for work…
     
  5. ZGrant231

    ZGrant231 Well-Known Member

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    A few seals and some labor could be a cheap dozer. Pony motors kept Here is one put together out of a few old cats I keep around for a cleanup cat. There are times a small dozer is priceless.
     

    Attached Files:

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  6. Lumberjack Matt

    Lumberjack Matt Well-Known Member

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    Well it took some doing but I was able to get her rolling. I about maxed out my 6 ton winch and it didn't budget, but as soon as I put a trail jack under a grouser it popped free. I have someone coming to help me load it up on Wednesday... it's going to be cramped getting the trailer lined up. Hopefully the track brakes work ok.


    skip to 16:10 in here to see it move:

     
    Last edited: May 22, 2021
  7. Tones

    Tones Senior Member

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    Well done Matt. The blade set-up looks like a Caterpillar build apart from the tilt. Those lift rams should have shims behind the end plate on the barrel so when they weep you remove a shim and rebolt it. The hose end on the lift cylinders are reusable. On that model there's no live drive to the winch so the master clutch must be engaged to operate it and the levers on the far R/H side are a break lever and a lever to engage the winch which are adjusted through the inspection plate you removed.
     
  8. Sam1734

    Sam1734 Well-Known Member

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    I love watching these old machines recovered rather than scrapped.
     
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  9. Sam1734

    Sam1734 Well-Known Member

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  10. Old Magnet

    Old Magnet Senior Member

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    The video is a different governor, fuel injection pump and engine than what's is a 7U D4 but that bit about the o-ring seal between fuel tower and pump and the end of the fuel gallery still applies.
     
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  11. Sam1734

    Sam1734 Well-Known Member

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    Yes, When he got to that part was when I thought about this.
     
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  12. Lumberjack Matt

    Lumberjack Matt Well-Known Member

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    Well, I'm glad I hired a pro to move this thing, otherwise I'd still be out in the woods trying to get the trailer lined up.
    PXL_20210526_180547189.jpg

    Anyways, it's mine now officially. Here she sits after a nice power washing.
    PXL_20210526_231655572.MP.jpg PXL_20210526_231619122.jpg PXL_20210526_231604059.jpg

    I guess first order of business will be to change fluids, clean out the radiator, fix the fuel injection leak, and see if she will fire up.
     
  13. Sam1734

    Sam1734 Well-Known Member

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    Looks great!
     
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  14. Old Magnet

    Old Magnet Senior Member

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    I'm curious to know where the hydraulic source is for the blade tilt???
     
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  15. Lumberjack Matt

    Lumberjack Matt Well-Known Member

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    The lift and tilt lines all run to the same valve box that has this lever on it, presumably which switches functions. A few taps with the mallet got it moving freely.

    PXL_20210527_022729340~2.jpg

    Don't see a manufacturer stamp on it, but there is a number on it.

    PXL_20210527_022954171.jpg
     
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  16. Spud_Monkey

    Spud_Monkey Senior Member

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  17. Old Magnet

    Old Magnet Senior Member

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    OK, awkward but it will work, kind of thinking the source may have been another pump but I didn't see an additional control valve.
     
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  18. Sam1734

    Sam1734 Well-Known Member

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    Now I’m curious, might be a nice addition for the D6.
     
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  19. DMiller

    DMiller Senior Member

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    First efforts should be to see if engine will roll over by hand, that being said if locked up all other fluids are moot until that is freed up.
     
  20. Delmer

    Delmer Senior Member

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    crack the drain plugs enough to let out several drops until you know it's the right kind of fluid, that is no water. Then start it up with the old fluids, maybe change the filters if they're real old and cheap. No point in draining the clean oil and leaving all the gunk in the bottom of the pans where it's settled now.
     
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