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Hitachi Ex120 Problem

Discussion in 'Excavators' started by spunkeymonkey, Jul 7, 2009.

  1. dakuch

    dakuch Member

    Joined:
    Feb 14, 2011
    Messages:
    23
    Location:
    Chicagoland
    TOOL KING
    I sent you a PM , do you think you can help me out with my EX40UR? Thanks JIM
     
    Last edited: Nov 9, 2011
  2. pemolitor

    pemolitor Active Member

    Joined:
    Feb 27, 2008
    Messages:
    29
    Location:
    Iowa
    TOOL KING. I could use both manuals. I have a -2 machine. I will send you a pm with my email
     
  3. Andre-1

    Andre-1 Active Member

    Joined:
    Feb 5, 2011
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    Location:
    Jamaica
    did you get the manual or do you still need the pics?
     
  4. pemolitor

    pemolitor Active Member

    Joined:
    Feb 27, 2008
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    Location:
    Iowa
    Andre-1, tool king's mailbox was full so I didn't get the manuals yet. I could still use the pics. I really appreciate the help. I've spent a lot of money to have this diagnosed with no luck.
     
  5. asripaka

    asripaka New Member

    Joined:
    Nov 10, 2011
    Messages:
    2
    Location:
    malaysia
    ex120-2 service manual and parts manual

    I am interested in Hitachi EX120-2 manual if anybody have the copies please e-mail me as I really need it for my machine troubleshooting and repair. stuggle to repair it since five month ago.


    my email adress: mohdasri@petronas.com.my or asripaka@yahoo.com.my
     
  6. Andre-1

    Andre-1 Active Member

    Joined:
    Feb 5, 2011
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    38
    Location:
    Jamaica
    pressure reducing valve.PNG pressure reducing valve.PNG
    pressure reducing valve

    Location: open door on cab side next to radiator and oil cooler, remove air cleaner and the valve is directly in front of you. it has 7 solenoids on it and two valves: pilot pressure reducing valve and pilot pressure regulating valve.

    pilot pressure reducing valve is the shorter valve on the extreme right. The pilot pressure reducing valve is used to set the point at which the different applied pressures start to move the flow compensator valves. this is important for combined operations. setting should be 512 +/- 15 PSI. pressure may be increased by adding shims.
     
    Last edited: Nov 10, 2011
  7. Andre-1

    Andre-1 Active Member

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    Location:
    Jamaica
    a arm out pilot cap (2).PNG

    this is on the main control valve, looking from the front of the valve/ machine it is the second pilot cap from left to right. this is where you test the pressure in the pilot circuit. this pilot pressure is regulated by the pilot pressure regulator it is the taller valve on the pic showing the pilot pressure reducer, the reducer is the shorter valve where the gauge is shown attached. both contain spring and spools and shims to set the pressure. regulated pressure should be 740 + 140 - 0 PSI when you operate arm out function. engine should be at max power, hyd temp around 50 degrees Celcius , autoidle off,work mode in general purpose. Rememebr this is for a 490E Deere. not sure if the same specs for the hitachi 120. Private message me your email so i can send you better pics and some extracts.
     
  8. tool_king

    tool_king Senior Member

    Joined:
    Mar 29, 2010
    Messages:
    1,684
    Occupation:
    road mechanic owner
    Location:
    new jersey
    pemolitor
    download these links .The tech schimatic drawings and workshop are for dash 5 but should help out .
    schimatics
    http://www.4shared.com/document/04JXvgIx/01_ELE1.html
    http://www.4shared.com/document/CYc8OTum/02_ELE2.html
    http://www.4shared.com/document/HDhNxApy/03_CON1.html
    http://www.4shared.com/document/g57IuxEN/04_CON2.html
    http://www.4shared.com/document/zenNzBVO/05_ENG.html
    http://www.4shared.com/document/KXB63oeG/06_CAB.html
    http://www.4shared.com/document/KBwHw99h/07_RELAY1.html
    http://www.4shared.com/document/o_FIKpER/08_RELAY2.html
    http://www.4shared.com/document/3zfJYy--/09_AC2.html
    http://www.4shared.com/document/naiymPBf/10_AC1.html

    Parts
    http://www.4shared.com/document/fBKNvIVx/CATALOG_EX120-2_PARTS_CATALOG.html

    Tech manual
    http://www.4shared.com/document/IluTD0G5/COMPONNT_OPERATION__CONTENTS_1.html
    http://www.4shared.com/document/PnISQRWS/GENERAL_CONTENTS_155T-1-1__3.html
    http://www.4shared.com/document/RiHwZklF/PROFORMANCE_TEST_CONTENTS_155T.html
    http://www.4shared.com/document/5WkPRWp9/SYSTEM__CONTENTS_155T-2-1__2.html
    http://www.4shared.com/document/Ku0DI-8A/TROUBLESHOOTING_CONTENTS_155T-.html
    http://www.4shared.com/document/xdGNqzFg/INDEX_3.html

    workshop manual
    http://www.4shared.com/document/ZJ-tvBQN/ENGINE_AND_ACCESSORIES_W05_2.html
    http://www.4shared.com/document/wwKxyuB4/FRONT_ATTACHMENT_CONTENTS_155W.html
    http://www.4shared.com/document/soJ-uhvN/general__155W-1-1__2.html
    http://www.4shared.com/document/HbvEfdTJ/undercarriage_155W-3-1__2.html
    http://www.4shared.com/document/jq4ioR3L/upper_structure_155W-2-1__2.html
    http://www.4shared.com/document/EZUOQK_8/INDEX_4.html

    Hopefully these help you out.Let me know when you download them.to make sure you got them all.
    thanks
    ED
     
    Last edited: Nov 10, 2011
  9. tool_king

    tool_king Senior Member

    Joined:
    Mar 29, 2010
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    1,684
    Occupation:
    road mechanic owner
    Location:
    new jersey
    dakuch
    I do not have the manual for your machine.But their is website that sell manuals for all kinds of machines.They are retty good on prices .I will send the web address to you.
    thanks
    Ed
     
    Last edited: Nov 10, 2011
  10. Andre-1

    Andre-1 Active Member

    Joined:
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    38
    Location:
    Jamaica
    Pemolitor I checked it out, it appears the ex120- 2 and 490e are built the same. so the same specs should apply. I have some extracts from the manual I can send you via email
     
  11. Andre-1

    Andre-1 Active Member

    Joined:
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    38
    Location:
    Jamaica
    Tool king I think pemolitor has the ex120-2
     
  12. tool_king

    tool_king Senior Member

    Joined:
    Mar 29, 2010
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    Occupation:
    road mechanic owner
    Location:
    new jersey
    Andre-1
    I figure any information is better than none when you are in bind.
    Can you email those extracts that you have for the 120-2 and 490E .That would be awsome to have the info.My email is tool_king@hotmail.com .
    Please feel free to download the links I posted for yourself.
    thanks
    ED
     
    Last edited: Nov 11, 2011
  13. pemolitor

    pemolitor Active Member

    Joined:
    Feb 27, 2008
    Messages:
    29
    Location:
    Iowa
    Tool king, Andre-1, thank you for all the info. Hopefully this helps me fix what was told to me to be unfixable. Andre-1 pm sent.
     
  14. tool_king

    tool_king Senior Member

    Joined:
    Mar 29, 2010
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    1,684
    Occupation:
    road mechanic owner
    Location:
    new jersey
    pemolitor
    What is the problem that they can not be fixd?
     
  15. digfaster

    digfaster Member

    Joined:
    Aug 23, 2011
    Messages:
    20
    Occupation:
    power plant operator / farmer
    Location:
    indiana
    My 120-3 is having a similar problem, travel and boom functions are extremely slow. Dipper and swing seem to be ok. Anyone have any ideas?
     
  16. pemolitor

    pemolitor Active Member

    Joined:
    Feb 27, 2008
    Messages:
    29
    Location:
    Iowa
    I shouldn't say can't be fixed..... they just want me to throw $10,000 parts at it and hope it solves the problem. That just under half the what I paid for it. All the can tell me is I have an internal test without doing and pressure test.
     
  17. nolap

    nolap New Member

    Joined:
    Nov 17, 2011
    Messages:
    2
    Location:
    ireland
    looking for a manual for ex 120 -2
     
  18. jaytech

    jaytech Well-Known Member

    Joined:
    Aug 23, 2011
    Messages:
    45
    Location:
    jackson ms
    nolap the manuals toolking posted on page 13 of this thread are pretty good.
    the parts one is for the ex 120-2 the others are for the ex 120-5 which is very close.
    thanks toolking
     
  19. -3Doc

    -3Doc Well-Known Member

    Joined:
    Jul 29, 2009
    Messages:
    119
    Occupation:
    Ticketed HD Mechanic
    Location:
    British Columbia
    I have the workshop manual, technical manual and operators manual for this machine.
     
  20. rgl726

    rgl726 Well-Known Member

    Joined:
    Sep 11, 2010
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    Location:
    cebu city, philippines
    nice to see back on the thread -3Doc.:) long time no see.