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Hitachi ZX 210 with electrical problems.

higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
Good morning, I received a Hitachi ZX 210 without an acceleration motor and with the cables in a bag. Could someone help me with the electrical diagram or tell me where the harness, which has an 18-pin connector, is connected and where the acceleration potentiometer signal goes? Thank you.
 

higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
That harness looks like it needs lots of work. Maybe someone will chime in with a schematic.
Simon C
I can't find the tree or the diagram, we are desperate with that equipment and I can't find where the 18-pin connector goes, any contribution would be appreciated.
 

higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
Thanks to all those who are diligent in collaborating with me, and to all those who enrich and make this forum great. I will organize the cables and try to make a diagram to see if you can help me. I couldn't find where that type of connector goes on the equipment.
 

Diesel Dave

Senior Member
Joined
Sep 29, 2022
Messages
2,735
Location
Ontario Canada
@higuita, thinking about it , I would say the wire harness shown in your pictures connects to the (4) pressure sensors and (2) solenoids on the hydraulic pumps ,the engine oil level switch ,the engine oil pressure switch and the engine speed stepping motor and sensor.
I think the mating 18 pin connector you are looking for is in the area of hydraulic pump compartment.
.
1742433941334.jpeg
 
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higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
@higuita, thinking about it , I would say the wire harness shown in your pictures connects to the (4) pressure sensors and (2) solenoids on the hydraulic pumps ,the engine oil level switch ,the engine oil pressure switch and the engine speed stepping motor and sensor.
I think the mating 18 pin connector you are looking for is in the area of hydraulic pump compartment.
.
View attachment 336628
Thank you very much. You've helped me a lot to get started, but I have a question: What do the numbers mean? And where does the acceleration potentiometer signal go? Could you give me a picture of the fuse box, the relay box, and the ignition switch? What input signal is detected by the automatic acceleration when moving a hydraulic control? In any case, you don't know how grateful I am to you and this group, which is, by the way, very good.
 

higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
@higuita, thinking about it , I would say the wire harness shown in your pictures connects to the (4) pressure sensors and (2) solenoids on the hydraulic pumps ,the engine oil level switch ,the engine oil pressure switch and the engine speed stepping motor and sensor.
I think the mating 18 pin connector you are looking for is in the area of hydraulic pump compartment.
.
View attachment 336628
I was checking and it has many things canceled and the oil pressure and water temperature have adapted analog sensors. They work with 2 ropes tied directly to the injection pump. That equipment is a disaster. They have removed installations separately and the current flow solenoid (master) does not activate.
 

higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
I was checking and it has many things canceled and the oil pressure and water temperature have adapted analog sensors. They work with 2 ropes tied directly to the injection pump. That equipment is a disaster. They have removed installations separately and the current flow solenoid (master) does not activate.
 

higuita

Member
Joined
Mar 15, 2025
Messages
10
Location
colombia
con el manual de servicio podria restaurar buen ese equipo, pero no lo consigo no se bien que modelo será si es (-3 -4) o que referencia?
 

Diesel Dave

Senior Member
Joined
Sep 29, 2022
Messages
2,735
Location
Ontario Canada
I was checking and it has many things canceled and the oil pressure and water temperature have adapted analog sensors. They work with 2 ropes tied directly to the injection pump. That equipment is a disaster. They have removed installations separately and the current flow solenoid (master) does not activate.
I need to ask , Is there any sign of the machine being swamped (water damage) or has fire damage ?
At this early point ,I would try and figure out what actually exists on the machine. Does it have all the components shown in the screenshot below (especially the main controller #4) ?
And all the components in the 2nd screenshot (especially item #20 engine speed control dial ) ?
Screenshots below from Operational Principle manual # TO178E04 .
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1742477038549.jpeg
.
1742478071685.jpeg
 
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