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!

vibromax steering

Discussion in 'Rollers' started by kgwfarm, Feb 16, 2019.

  1. kgwfarm

    kgwfarm Member

    Joined:
    Jan 16, 2016
    Messages:
    12
    Location:
    georgia
    During cylinder test return line from cylinders to hmu had oil flow. Beleived internal failure of hmu. Both steering cylinders packing checked good, and steering system pressure checked good. Customer wanted to try hmu as probable cause and get machine to job site.
     
  2. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    1,106
    Location:
    USA
    No, what was the initial problem?
    Why you started testing cylinders?
     
  3. kgwfarm

    kgwfarm Member

    Joined:
    Jan 16, 2016
    Messages:
    12
    Location:
    georgia
    Steering wheel was requiring excessive force to rotate.
     
  4. kgwfarm

    kgwfarm Member

    Joined:
    Jan 16, 2016
    Messages:
    12
    Location:
    georgia
    Wanted to eliminate a blown or leaking packing first.
     
  5. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    1,106
    Location:
    USA
    Got it.
    So as far I understand with the new one it’s all the same?
    Want to make sure that you understand correctly - flow out of hose normal only at steering neutral!

    Actually if in that system if you pushing oil to the head side of the cylinder, your rod end hose is open to the return gallery of the steering system which is also a charge gallery of hydrostatics ( unless I missed a check valve in the diagram). So having flow on that hose is normal when trying to operate the steering. Plus it tees in to the head side of the another cylinder which can be leaking.
     
    Last edited: Mar 2, 2019
  6. kgwfarm

    kgwfarm Member

    Joined:
    Jan 16, 2016
    Messages:
    12
    Location:
    georgia
    Flow i was seeing at cylinder stall and continous rotation of wheel to pressurize cylinder barrels and check leakage of seals. Return line disconnected so oil would show if seals blown. I use this test often on cylinders and don't get flow from return line that is disconnected. Sorry for long explanation just want to make sure we are discussing the same thing.
     
  7. TVA

    TVA Senior Member

    Joined:
    May 14, 2018
    Messages:
    1,106
    Location:
    USA
    I got you!
    To test cylinders that way on this system you would have to disconnect steering from drive.

    Did you test both cylinders this way, or just one and then saw this flow and moved on to orbitrol? Because the other one might be leaking if you didn’t test it.
     
    Last edited: Mar 2, 2019
  8. kgwfarm

    kgwfarm Member

    Joined:
    Jan 16, 2016
    Messages:
    12
    Location:
    georgia
    Tested both and witnessed flow described both times.