Hitachi excavator ex

[lminter240]

I Have a Excavator Hitachi EX 55 UR, after work 20 minutes normal Temp.
is coming alarm @ the dashboard RED LIGHT SYSTEM, end stop work
all hydraulic system, Problem all instruction for diagnostic and reset ECM
is written in Japanese.- You can help me??????
Thank you
LOU

 

[captain charlie]

Learn Japanese, get manual translated, (i had to say that sorry) check radiator for water, test for antifreeze ( i like to stick finger in and then lick it), see if fan belt is there and tight, you may have to pull thermostat and test for opening.

 

[lminter240]

Sorry, Engine is perfect, maybe hydraulic sensor??????????????????????????????

 

[lminter240]

I think no many peoples know about Hitachi Excavator EX55UR, I desperate
need the machine working now.
Thank you

 

[captain charlie]

Which light are you talking about, engine water temp or hydro temp. When i use my EX50 to doze the temp will climb but not in twenty minutes. I don't have a hydro temp on this machine.
regards
charlie

 

[binkie]

we have a hitachi ex 100-1, that over heats after 40 min, when i lift the bonnet the temperature drops.any ideas on how to fix problem?

 

[sultan]

we have a hitachi ex 100-1, that over heats after 40 min, when i lift the bonnet the temperature drops.any ideas on how to fix problem?

There could be all sorts of causes for overheating.

My Guesses:
-Failed thermostat
-Failed water pump
-Clogged radiator fins (inside blockage preventing coolant flow or dirt preventing air flow around the fins)
-Insufficient coolant

Sometimes even engine oil issues can cause increased heat from friction.

Check these first and see if they are your problems.

And there are many more possible causes that a mechanic would be able to think of...

 

[watglen]

If you can operate with the hood up, but not with it closed, then blocked airflow passages would be my guess. Look for trash blocking airflow into the fan/rad area.

 

[lminter240]

Light location is @ dashboard red color with alarm - sign say SYSTEM, and after 5 minutes
working well, after pass 5 minutes all hydraulic work very very SLOW, I change hydraulic
oil, hydraulic filter, change strainer inside hyd. tank, Now Slow speed is start when alarm
and red light is ON.
Thanks ALL
LOU

 

[lminter240]

HITACHI EX55 UR, Thanks ALL, I fix the machine, just replaced COMPUTER, and now
woking perfect
Thank you again

 

[robert235]

I have a EX55URC grey market to North America. it seems to operate at 195'F and the temperature gauge is at the top of the range but not in the red. We changed the coolant rad and thermostat. Do i have worn water pump or other problems. is this normal for this machine.

 

[tony Zandl]

Hi can you tell me where i can purchase a Hitachi ex 55 ur -3 computer (contol modual) I have the same problem.I hope somone can help me locate one off these computers.
Thanks
Tony.

 

[topcat]

I need an operators hand book for a EX55UR knuckle boom Hitachi excavator in english please anyone know of a site to download or buy these manuals .
Machine is working OK but hydraulic modes only have Jap writing on indicators & I found a blown 10Ampm fuse that may have something to do with the hydraulic controls as they are real sensitive & fast at the moment & there is no indicator lamps lighting on the dash when the switch or switches are moved .?
any one got a clew what these controls .
TC

 

[tool_king]

lminter240
If you need to read a code .Let me know .I have the Hitachi Wind Dr and the Hitachi DrEx.I am in Passaic County.

 

[aboutenuf]

Hitachi EX60URG hydraulic failure- The unit has hydraulic power on RH track, bucket and boom- No power or pressure on LH track travel, stick up or down, Can the hydraulic pump be somehow diivided like this and have a stuck relief vale or why only operate from one side? anybody know?

 

[topcat]

thanks too_king

I can still work machine but just jerky & will stall engine if I butt out a ram still finding my way around the little gadget & fixing stuff as I go .
Just identfieing what the stick writing all means replaced a 12Amp fues still no lights on the 3 position switch ?
Thanks for the first clew mate I will get back to you , TC

 

[topcat]

Got another days work done found the RPM down as is engine power throttle cable needs ajusting only geting half travel to Hi speed stop.
Fan belt loose & radiator core Oil cooler needs hoseing out.
Can computer be reset by removing battery leads that may dump fault codes & start a fresh page .
Working my way through this little gadget as its had lots of neglect for the hours its got on it

 

[tool_king]

topcat
Disconecting the battery will not clear the fault code from the computer.You need to use a Hitachi dr ex scanner or the laptop version to do so.

 

[topcat]

Thanks Tool_King now I got to look for the computer port or Data plug to plug my scan tool into got a local bloke looking for info on Hitachi I will Google a few things & see whats about on these machines down under there are a few about .
Thanks for your time mate I will pass on any solved problems to the site here .
TC

 

[tool_king]

topcat
The connector should be in the fuse box .I will be a white connector with four pins or could have a white six pin connector with three pin in or both.If you have the Hitachi scanner it will work.I have three tools Iuse. The Dr EX,Palm pilot and a laptop software call WinDr.Let me know if you need any tool numbers or further help.