ArboristSite.com Sponsors
 
 


7900 rebuild... YES ANOTHER DOLMAR 6400-7900 thread!

Discussion in 'Chainsaw' started by nstueve, Sep 7, 2012.

  1. nstueve

    nstueve Makita Freak!

    Joined:
    Oct 22, 2010
    Messages:
    3,463
    Likes Received:
    769
    Location:
    Iowa
    I was just wanting to know if anyone has done a full rebuild on a 7900? I know these are really reliable saws but surely someone has... Right?

    I'm mostly wanting to know if the 6400/7900 bearings and seals are standard size? Just wanting to know how parts availability will be in 10-20-30 years from now. I know husky mostly uses standard size seals and bearings and Stihl is notorious for not using standard sizes. Just wanted to know where Dolmar fell in this category. Also any threads, comments, impressions others have on a full Dolly rebuild. Asked this in another thread and I think it got glanced over...

    Cheers and Happy FRIDAY!

    PS: yes i titled this thread to look like a build thread to sucker more people into it... :)
     
  2. Edge & Engine

    Edge & Engine Addicted to ArboristSite

    Joined:
    Mar 9, 2007
    Messages:
    1,950
    Likes Received:
    219
    Location:
    Cassadaga, New York
    I've done full rebuilds several times, problems ranging from straight-gassed to tree smashed. The crank bearings are made by Schaeffler FAG, 6203 series bearings. I'm sure they could be sourced elsewhere.
     
  3. nstueve

    nstueve Makita Freak!

    Joined:
    Oct 22, 2010
    Messages:
    3,463
    Likes Received:
    769
    Location:
    Iowa
    cool. Was the rebuild pretty easy? I know the 7900 series is pretty easy to work on in general but just curious... I've begun to see more and more of these things localy. Case splitter needed? just bake or heat the case halves to get the bearings in right?

    Seen/read tons of husky and stihl rebuild threads but never a 7900 series rebuild thread...
     
  4. w8ye

    w8ye Addicted to ArboristSite

    Joined:
    Apr 16, 2011
    Messages:
    3,975
    Likes Received:
    630
    Location:
    Ohio
    The Dolmar 6400/7900 family is set up more like a Husqvarna than a Stihl.

    Rumered that the orginal R&D was a joint venture with Solo?

    I have some of these and the 5105 but never any major trouble with them.
     
  5. nstueve

    nstueve Makita Freak!

    Joined:
    Oct 22, 2010
    Messages:
    3,463
    Likes Received:
    769
    Location:
    Iowa
    I've never had any problems with my 6401 bbk except a carb cleaning... I'm just waiting for the day a strait gassed Home depot model comes across my bench...
     
  6. FSburt

    FSburt ArboristSite Operative

    Joined:
    Jan 19, 2002
    Messages:
    307
    Likes Received:
    33
    Location:
    California
    Got mine rebuilt back in mid July after waiting for 6 monthes because they could not get one screw. I was going to just buy a new one and use this one for parts since the rebuild cost was going to be over 6 bills but the saw has less then 20 hrs on it and they could not get anymore 7900's since they were replaced by the 7910's and I did not want a new untested model so I spent the coin and got a nice running saw back. I do need to build up a parts supply though. I wish dolmar would sell a screw kit like stihl does but some of the screw interchange so that part is ok.
     

Share This Page