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D6c 74A

Discussion in 'Dozers' started by LG 78, Apr 25, 2022.

  1. LG 78

    LG 78 Well-Known Member

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    Hello everyone Im heading off to check out a D6c 74A 1826 today
    Can someone please let me know what year it might be
    Thanks for the help
     
  2. Old Magnet

    Old Magnet Senior Member

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  3. LG 78

    LG 78 Well-Known Member

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    Thanks once again Old Magnet
    Went and had a look all brand new under carriage and possibly one of the best examples left of this model
    One track adjuster has just failed on it do you know how difficult it is to replace?
    I realize the tract has to be split and the idler pushed forward but are they generally easy enough to replace
    Cheers
     
  4. LG 78

    LG 78 Well-Known Member

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    https://www.trademe.co.nz/a/marketp...oving-machinery/bulldozers/listing/3538341018

    I have upgraded I still have my 17a which I won't part with for now because hey you just have to have a 17a or 2 in the shed but this deal was just to good to miss can anyone identify the scoop for me please
    The machine has had a full engine rebuild in the past has new feet on it and is in very good order
    Just the track adjuster to fix and one drum on the cable controller won't spin everything looks to be free the linkages are in good order but some help would be greatly appreciated if someone can point me in the right direction why it won't turn Cheers
     
  5. Glum

    Glum Active Member

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    Scraper looks like a Sterling or NZ copy Cable Price?, not sure of the model.
     
    Tones likes this.
  6. Tones

    Tones Senior Member

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    The most likely fix for the track adjuster is failed seals and yes the idler has to be removed. The seals may have been damaged caused by over extension prior to the new chains being fitted To check remove the cover and pump grease into it and look for leaks. Do both sides while you are at it. If Coughs don't have them Seal Imports will.
    Is the drum on the CCU that's not working used for the bowl rise/lower rope?
     
    Last edited: Apr 27, 2022
  7. LG 78

    LG 78 Well-Known Member

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    Hi there
    Thanks for that not sure which drum does what yet but sitting in the seat it is the right hand side drum not turning
     
  8. Tones

    Tones Senior Member

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    That is usually the one used for the bowl hoist. Probably check the clutch adjustment first, dammed if I can remember how since it's over 50 years when I did it last. I have some recollection about turning the square nut on the side of the winch but that could be also for the brake. Others here will know. The last time I did it I was working a D7e and Birtley scoop at Waiouru.
     
    skyking1 and DB2 like this.
  9. sled dog

    sled dog Well-Known Member

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    Tones, you are correct. The square nut for clutches, brake adjusts on the band. On the clutch, left is tighter. Remember now?
     
  10. sled dog

    sled dog Well-Known Member

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    Wait a minute. The DRUM should not turn unless you pull the lever. However, the clutch discs should be singing to you with the engine running on a power shift, with the master dogged in on a direct drive. If the left DRUM is turning, that clutch is stuck or the lever is stuck in.
     
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  11. Tones

    Tones Senior Member

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    Bloody hell that's scary or maybe just very well taught. Sometimes I have to be reminded of what I did last week. :rolleyes:
     
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  12. DB2

    DB2 Senior Member

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    Just a reminder to shut the engine off before attempting any adjustments on those CCU’s.
     
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  13. LG 78

    LG 78 Well-Known Member

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    Thanks for the info everyone
    Its a manual drive clutchs are spinning freely but drum on the left will turn and brake when activated as it should all the linkages look to be in good order and working Fairly sure its just adjustment needed as the unit has been under cover but not used for some time
    I have purchased it
    Brand new under carriage Full re built engine less than 1000 hours ago new master clutch new radiator shes a minter
    My biggest problem now is do i sell my beloved D7 17A?
    It has about 40 to 50% U/C
    need to replace final drive seals from brake drum side
    still runs like new etc
    Need to adjust clutch and the clutch brake or replace - will be investigating this tomorrow
    What do you all think
     
  14. LG 78

    LG 78 Well-Known Member

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    My new D6C and Scoop
     

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  15. LG 78

    LG 78 Well-Known Member

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    And 2 17As
     

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  16. LG 78

    LG 78 Well-Known Member

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    Parts but she still runs
     

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    D6 Merv and 56wrench like this.
  17. Tones

    Tones Senior Member

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    Sell as is. Vic Draper could be interested in them. He is right into historical machines, then you'll see them at the show in Wanaka. :D
     
  18. Tones

    Tones Senior Member

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  19. LG 78

    LG 78 Well-Known Member

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    Yeah will do my best be keen as
     
  20. LG 78

    LG 78 Well-Known Member

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    Good evening to all the good and knowledgeable people
    Got the D6 home this morning and have got the track adjuster out and yes its just the seals
    I have taken both clutch packs out of the CCU as they are running metal on metal and the main seal behind the clutch plates is non existent on both sides
    Can anybody tell me if there is another supplier for the clutch plates apart from Cat? Its a number 25
    many thanks in advance