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Hitachi Ex120 Problem

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
 
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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
 

pemolitor

Active Member
Joined
Feb 27, 2008
Messages
29
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.
 

Andre-1

Active Member
Joined
Feb 5, 2011
Messages
38
Location
Jamaica
pressure reducing valve.PNGpressure 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.
 
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Andre-1

Active Member
Joined
Feb 5, 2011
Messages
38
Location
Jamaica
aarm 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.
 

tool_king

Senior Member
Joined
Mar 29, 2010
Messages
2,145
Location
new jersey
Occupation
road mechanic owner
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
 
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tool_king

Senior Member
Joined
Mar 29, 2010
Messages
2,145
Location
new jersey
Occupation
road mechanic owner
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
 
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Andre-1

Active Member
Joined
Feb 5, 2011
Messages
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
 

Andre-1

Active Member
Joined
Feb 5, 2011
Messages
38
Location
Jamaica
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

Tool king I think pemolitor has the ex120-2
 

tool_king

Senior Member
Joined
Mar 29, 2010
Messages
2,145
Location
new jersey
Occupation
road mechanic owner
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
 
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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.
 

digfaster

Member
Joined
Aug 23, 2011
Messages
20
Location
indiana
Occupation
power plant operator / farmer
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?
 

pemolitor

Active Member
Joined
Feb 27, 2008
Messages
29
Location
Iowa
pemolitor
What is the problem that they can not be fixd?
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.
 

jaytech

Well-Known Member
Joined
Aug 22, 2011
Messages
47
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
 
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