Need Help Guys on Hitachi EX120...

MoRaptor · Sep 9, 2012

I have a buddy that has a Hitachi EX120. It was running great last week when he parked it, went out the next morning, started up running great but for some reason it has no hydraulics at all. When you engage the hydraulics it does nothing, no hydraulic movement anywhere. I have not even gone out to look at the machine and I dont have a book for it yet. So if I do go out and look at it I wouldnt really know where to start. Im really just looking for some ideas on where to start and if this has happened to anyone else. Glad I found this forum and thanks all.

tool_king · Sep 9, 2012

Crazy question but has he check his lever lock.Sounds like your lever lock switch is not working or stuck .It is under left side joy stick control pod. What dash number is his machine?
THANKS
ED

MoRaptor · Sep 9, 2012

Not sure Ed. Im just going by what he has told me. I am going to get out to the machine some time this week so I will know better what im looking at. I will ask him about the lever lock switch. Thanks Ed.

tool_king · Sep 9, 2012

Do you know what dash 120 he has .I have operation ,parts ,and service for these machines in pdf format can send you a copy.

MoRaptor · Sep 9, 2012

I am not sure Ed I will ask him tomorrow and get back with ya. I will also try to get the serial #. Thanks Ed I appreciate it. PDF would definitely come in handy.

shopguy · Sep 9, 2012

Hello guys, thanks again toolking for helping me out last summer,maybe we can get you working Mo.

tool_king · Sep 9, 2012

shopguy you are very welcome .How did you make out with your machine? Wow has been a year already ?Time flies when you are working on heavy iron. I still have you number.Feel free to to call me if you need any help on anything you are working on.

shopguy · Sep 9, 2012

Same here. its working great now, angle sensor & engine fan was installed wrong way.

tool_king · Sep 9, 2012

That is awsome that you got it up and running.How did you figure it out?

MoRaptor · Sep 13, 2012

Ok all sorry I have had a very busy week but I did get some more info. It is a -2 And the serial # is 12N34372. I did get a chance to go out and check out the machine yesterday. I checked the 3 PVC fuses and they were all good. The owner was not there so I did not get a chance to do much other then kinda look around and try to familiarize myself with the machine a little bit. But same ole symptoms No Hydraulics at all. Thanks all.

shopguy · Sep 13, 2012

Nothing at all ? Like toolking said check the safety valve then the pilot pressure

MoRaptor · Nov 2, 2012

K all sorry its been so long been very busy. We figured out the it was the Hydraulic Coupler. Now we need a part # for the coupler. He did order one but wanted me to get on here and make sure he ordered the correct one. Any help would be great. Thanks All...

farmboss · Nov 2, 2012

Hey i have the exact same problem on my 120-2, just took off the Pilot pump thats mounted in tandem on the main pump and the spines are not turning when the engine is running. Whats the part number that you have for the coupler? and where does one find one?? thanks in advance!

-Peter

MoRaptor · Nov 2, 2012

Dont know Thats why im on here to see if someone has the correct Part#. I dont know what he ordered either.

Kvwranch · Dec 29, 2012

MoRaptor said:
I am not sure Ed I will ask him tomorrow and get back with ya. I will also try to get the serial #. Thanks Ed I appreciate it. PDF would definitely come in handy.

I have a 120-2 and looking for parts and manuals but having no luck do you think you could help?

rgl726 · Dec 29, 2012

Its 28H

MoRaptor · Dec 29, 2012

Well I would like to help you out but the guy that owned the 120-2 passed away and im not sure if he ever got it fixed.

shopguy · Dec 29, 2012

PM toolking I think he has them

tool_king · Jan 1, 2013

Cat_man320 · Jan 3, 2013

Not sure how the Hitachi are configured with respect to the safety lock out . If its a manual lever , it goes down to a small valve body usually under the floor plate . It can be accessed through the plates under the cab . I'm guessing one of the little tie rod ends that run from the lever in the cab to the lock out valve is rusted off or broken .
If the lock out lever in the cab is electric , then maybe the switch is faulty or gone out off adjustment or the solenoid that operates the hydraulic valve is not working .
Its just a guess on my part though . I had the same trouble with three of my Cat diggers .

Need Help Guys on Hitachi EX120...

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