1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

Hartle HBC750

Discussion in 'Crushers' started by TVA, Feb 6, 2019.

  1. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    931
    Location:
    USA
    Worked on Hartle HBC750.
    Just FYI who doesn’t know: the adjustment on controls is not pressure relief but flow regulator.

    That one had blown counterbalance O-ring. Those metric but odd “half” size: 27.5x2.5 mm
    and 25.5x2.5 mm

    Motors case drain port adapter is: metric port/DKO.
    I suggest ordering O-rings and have them in spares because I think they get blown if someone screws up and forgets to open return shut off on excavator.
     
    Last edited by a moderator: Feb 6, 2019
  2. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    931
    Location:
    USA
    Sorry, that was Hartl, not Hurtl!
     
  3. digger242j

    digger242j Administrator

    Joined:
    Oct 31, 2003
    Messages:
    6,078
    Occupation:
    Self employed excavator
    Location:
    Southwestern PA
    Fixed the typo.
     
  4. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    931
    Location:
    USA
    Thanks!
     
  5. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    931
    Location:
    USA
    Another thing I want to share: the first stage relief valve ( I’ll post a picture when I will figure out how to do it on this forum) small poppet valve looking thing with agjustment, has four small holes on its body radially. One of those have to be ligned up with a single hole in the control block body! There’s no groove. In the block, because those small holes used as fixed orifice flow restrictors. But if you don’t ligne on of them up than you will block the passage.
     
  6. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    931
    Location:
    USA
    Well it’s just dawned on me that I might have missing crush washer, I’ll update you when I will find out for sure!
     
  7. funwithfuel

    funwithfuel Senior Member

    Joined:
    Mar 7, 2017
    Messages:
    1,331
    Occupation:
    Mechanic
    Location:
    Will county Illinois
    Yeah I just looked up what that thing is I have 0 experience on them I don't even know how they operate sorry I wish I could have been more helpful
     
  8. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    931
    Location:
    USA
    I finally was able to communicate with the manufacturer of these things from Austria over Facebook messenger, but he said he needs to talk to his engineer tomorrow!

    Their website is down for three days in the row and he didn’t even know that.