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2007 Kobelco Sk250 LC - Throttle / Mechatro cont fail

Kyle Helmke

Well-Known Member
Joined
Aug 23, 2020
Messages
162
Location
Pittsburgh
When you installed the new metro controller who did the programming and what program did they install. I just went through this on a long reach, where the software was bad and the 2 new controllers the customer bought both read CPU failure. After getting the correct software the machine will change to ROM DATA FAILURE till an A adjustment is done. To run an A adjustment you need to hold mode button while turn key on 10 sec, then hold buzzer stop for 5 sec. Should take you to "adjust gap stop" screen, then follow screen instructions. If you search cpu failure you can find my old thread see if it sounds similar.
 
Last edited:

Charlieky123

Member
Joined
Jun 17, 2021
Messages
16
Location
40601
I have no clue what program they used. When I remove the CPU and start the machine, the machine acts completely the same.
I don’t have a schematic of the wiring or I would do some testing. Looking like end of week I may have a truck coming to move this but need to find a way to get it loaded before I have to get a crane.
Is there any other way to get the throttle to engage so I can move this machine?
 

Charlieky123

Member
Joined
Jun 17, 2021
Messages
16
Location
40601
We do have forward throttle, the machine is on a short downhill slope and either the reverse is not working or not enough power make it up a slight 15 degree pitch in reverse. If reverse is working, would we have enough power to make up a slight incline in reverse
 

Charlieky123

Member
Joined
Jun 17, 2021
Messages
16
Location
40601
There is a cable run with 1 good size green and white cable, and 2 small black cables. These are going to the stepper motor. The green and black cables are connected to a wiring harness but the white cable is disconnected. No schematic on hand.
Anyone have an idea where this should go?
 

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Kobelco ireland

Senior Member
Joined
Feb 28, 2016
Messages
449
Location
Ireland
Occupation
Mechanic
Did you try contacting lachau about the wiring diagram, maybe put a new thread in the excavator section asking for wiring diagram. Include your serial number when you ask.
 

Kobelco ireland

Senior Member
Joined
Feb 28, 2016
Messages
449
Location
Ireland
Occupation
Mechanic
I have no clue what program they used. When I remove the CPU and start the machine, the machine acts completely the same.
I don’t have a schematic of the wiring or I would do some testing. Looking like end of week I may have a truck coming to move this but need to find a way to get it loaded before I have to get a crane.
Is there any other way to get the throttle to engage so I can move this machine?
your new controller should of come pre programmed unless you asked for a blank controller. Contact who you bought it from and ask was it pre programmed for you machine. As for your question about engaging the throttle you could manually move it to full throttle but because none of the pump solenoids, bypass solenoids etc are not getting a signal from your controller the machine hydraulics will still be fairly useless.
 

Kyle Helmke

Well-Known Member
Joined
Aug 23, 2020
Messages
162
Location
Pittsburgh
Your cpu was never programed I can almost guarantee it. Call the closest kobelco dealer and have them put software in your controller. As for over ride there should be a emergency shut down cable in cab in the old kobelco, disconnect your stepper motor and use this cable to run fuel. Behind the seat where controller is you should have an emergency control toggle switch, this should set you pumps to a pre set output, won't be fast but should move.
 

Kyle Helmke

Well-Known Member
Joined
Aug 23, 2020
Messages
162
Location
Pittsburgh
There is a cable run with 1 good size green and white cable, and 2 small black cables. These are going to the stepper motor. The green and black cables are connected to a wiring harness but the white cable is disconnected. No schematic on hand.
Anyone have an idea where this should go?
Looks like your glow plug wiring
 

wikit

Active Member
Joined
Sep 3, 2019
Messages
42
Location
ohio
I have no clue what program they used. When I remove the CPU and start the machine, the machine acts completely the same.
I don’t have a schematic of the wiring or I would do some testing. Looking like end of week I may have a truck coming to move this but need to find a way to get it loaded before I have to get a crane.
Is there any other way to get the throttle to engage so I can move this machine?
unhook the stepper linkage and throttle the motor by hand
 

Aubrey Phillips

Well-Known Member
Joined
Mar 12, 2020
Messages
50
Location
Mobile, AL
Just curious if you ever got it figured out. I’m tracing similar issue on my sk135. I’ve traced back to the dc convertor which converts 24v to 12v for kpss switches and it also feeds 12v back to cpu for serial communications for display I’m assuming. I’ve have no 12v but 24v feeding into convertor which is located behind the hour meter under display in trim panel. I will order a convertor tomorrow and see what happens.
 

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Zivisic

New Member
Joined
Dec 15, 2022
Messages
3
Location
Croatia
Hi everyone,
Looks that i have the same problem with Kobelco ECU.
Mehatro fail 1
I bpught mew ECU from Kyotech, rhey send me a video from simulator...how new ecu is working with steper and some LEDs.
But, pluged in my machine, all is the same...only steper works bi heigher, but mesage stay.
I gave ecu, display and S,FC,H controler to eletrician...he told me, he dont have acces, but forshure, softweare on devices are not compatibil.
My machine is SK130UR
Can somebody with experiance help, what to do
Thx
 

wikit

Active Member
Joined
Sep 3, 2019
Messages
42
Location
ohio
Check wiring harness well; the stepper motor might need to be re introduced to the ecm
 

wikit

Active Member
Joined
Sep 3, 2019
Messages
42
Location
ohio
Check wiring harness well; the stepper motor might need to be re introduced to the ecm
 

Zivisic

New Member
Joined
Dec 15, 2022
Messages
3
Location
Croatia
Stvarno sam provjerio Harnes...nekoliko puta
Al je dobro, imam punu el sheme machine, al 24v and - , diods are good.
@Aubrey Phillips...did you fix your problem?
Bojim se da digitalna komunikacija između uređaja nije working...
 
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