Ls185b hydraulic problem !

[treyfox77]

The next step is to make sure you have power at the terminals of the instrumen panel. Follow my wiring diagrams noting which wires have arrows pointing to the instrument panel. I am away from home for a few days so I do not have the diagrams with me. Sit in the seat, fasten the seat belt and then turn the key on. You should have power at all those terminals. You do not need to turn the key to start or check those terminals, since the system will unlock the pedals with key in the on position. If all those terminals have power and you push the button but the pedals do not unlock, then check the terminal with the wire going to the pedals. If all have power but the pedal terminal is not powered then it is likely the panel is defective. ..........when you say shut down, do you mean the hydros stop moving or do you mean the engine dies.

Also wanted to tell you I bought a service Manual , and are looking at wiring schematics there ...... it was a bit pricey but figured it would be good to have !

 

[walio123]

Also wanted to tell you I bought a service Manual , and are looking at wiring schematics there ...... it was a bit pricey but figured it would be good to have !

Having the right manually is always a good idea. I still can not understand exactly which model is your machine. On the instrument panel of some models, there are 2 relays next to the ignition key. Check that their wires go to the mode shift switch. If so, there is something wrong.

 

[treyfox77]

Having the right manually is always a good idea. I still can not understand exactly which model is your machine. On the instrument panel of some models, there are 2 relays next to the ignition key. Check that their wires go to the mode shift switch. If so, there is something wrong.

Ok today I check the power to the eic controller per the pin out from the repair manual. I have power from both the seat belt sensor ( pin 13) and seat sensors ( pin 12) going into the panel . Why I don't have is power coming back out going to the foot valve solenoids . It is labeled hyd interlock out ( pin 14) . Does this mean the EIC panel is bad ? Is there any options to fix this one ? I looked it up and it seems very expensive!

 

[walio123]

Ok today I check the power to the eic controller per the pin out from the repair manual. I have power from both the seat belt sensor ( pin 13) and seat sensors ( pin 12) going into the panel . Why I don't have is power coming back out going to the foot valve solenoids . It is labeled hyd interlock out ( pin 14) . Does this mean the EIC panel is bad ? Is there any options to fix this one ? I looked it up and it seems very expensive!

there is a way of course. One has already figured out from you ... give 12 volts of solenoids, but you are surrounded by security. Probably the panel is wrong and expensive. Put a relay (4 pins normally open) to get command command from pin 12 and supply current to both solenoid s/that wire wich comes from seat switc./. It will be shure in off .You need a fuse on the wire that goes to the solenoids. You have these wires in the panel, just look for plase for a relay.

 

[Mike10]

Ok today I check the power to the eic controller per the pin out from the repair manual. I have power from both the seat belt sensor ( pin 13) and seat sensors ( pin 12) going into the panel . Why I don't have is power coming back out going to the foot valve solenoids . It is labeled hyd interlock out ( pin 14) . Does this mean the EIC panel is bad ? Is there any options to fix this one ? I looked it up and it seems very expensive!

You also need power at pins 3, 2,24, along with 12 and 13, with the key on in the seat and seat belt fastened. If you have power to all 5 terminals, then the problem probably lies with the instrument panel.

 

[Mike10]

You also need power at pins 3, 2,24, along with 12 and 13, with the key on in the seat and seat belt fastened. If you have power to all 5 terminals, then the problem probably lies with the instrument panel.

Not 2 but 23

 

[Mike10]

Not 2 but 23

3,12,13,23,24. 3 is 12v from battery, 12 is seat switch, 13 is seat belt, 23 and 24 are 12v in from run relay with key in on position

 

[treyfox77]

3,12,13,23,24. 3 is 12v from battery, 12 is seat switch, 13 is seat belt, 23 and 24 are 12v in from run relay with key in on position

Ok went back to the machine and check all five pins this time , all have power going to them . So it's time for a new panel ??

 

[Mike10]

Ok went back to the machine and check all five pins this time , all have power going to them . So it's time for a new panel ??

I think I would check the integrity of the harness by checking continuity between pin 14 and the connectors at the control valve. Unplug the control valve solenoids and unplug the instrument panel. Check for continuity from pin 14 to both connectors. Also check continuity between the black wire at the control valve connectors and ground. If all is ok, then you might check with your dealer if they have a loaner instrument panel to check for sure the problem resides there. Everything points to the instrument panel, but you want to cover all other bases.

 

[treyfox77]

Ok went back to the machine and check all five pins this time , all have power going to them . So it's time for a new panel ??

Still check that even though I don't have power coming out of the panel at pin 14 ?

 

[walio123]

Still check that even though I don't have power coming out of the panel at pin 14 ?

After you have a voltage of pins 12 and 13, and you have not pin 14 it is clear that the fault is in the one that sends the voltage to pin 14, that is to say, the control panel. It is always good to buy it ... but if you do not want to spend a lot of money, you can do it in the way I have described to you a few post above

 

[Mike10]

Still check that even though I don't have power coming out of the panel at pin 14 ?

Yes, still check those wires. It will only take a couple of minutes. Do not bypass the safety equipment. Surely someone thinks you or a child is worth more than an instrument panel.

 

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If the pedals are locked all the time, then start there. Air will not cause the pedals to lock. With the service run switch in the run position, I think the toggle switch is forward. With the key in the OFF position, watch the instrument panel as you sit in the seat. The panel should light up and go through a self test when you sit in the seat. If the instrument panel does not light up, raise yourself off the seat and flip the service/run switch in the opposite direction and then sit back down. If the instrument panel does not light up, then you are not getting power back to the instrument panel through the seat switch.......................If the panel lights up with the key off, then the seat switch circuit is working. After the instrument panel finishes the self test, there will be two lights lit on the panel, park and seat belt. Fasten the seat belt and the seat belt light should go out. If the light does not go out, then the circuit from the seat belt to the instrument panel is not working. All these initial tests are done with the key in the off position. With the seat belt light off then turn the key to the on position and the pedals should be free.............Even with the pedals locked you can still tell if the hydraulic pump is working by engaging the aux hyd by pivoting the top of the right handle up or down. If the hydraulic pump is working then the engine will pull down when the oil deadheads at the couplers...........Unless something is blocking the intake, even sucking air would not keep the loader from moving without having an oil mess from the loose or damaged hose.

Mike, I am new to forums, so If I'm not following etiquette or protocol, let me know. I too have a 2005 LS 185.b, 2 speed, no cab with similar issues. I bought the machine knowing it has issues, previous owner said it was a wiring problem?? Anyway, it appears the seat and seat belt safety switches have been disconnected(jumped), same for "run/service" switch. Engine starts and runs fine, however brakes and foot pedals won't unlock when we push the "unlock brake" on the instrument panel and machine won't move. Auxiliary hydraulic appear to be working. From reading this entire thread, do all the safety switches to be hooked up and operational or can they be "jumped" for testing purposes? You suggested the safety switches must be activated in a certain order? A poster from another forum suggested we do a Charge Pressure Drop Test--if you think that's necessary, what is it and how is it done? Appreciate your response.

 

[Mike10]

Mike, I am new to forums, so If I'm not following etiquette or protocol, let me know. I too have a 2005 LS 185.b, 2 speed, no cab with similar issues. I bought the machine knowing it has issues, previous owner said it was a wiring problem?? Anyway, it appears the seat and seat belt safety switches have been disconnected(jumped), same for "run/service" switch. Engine starts and runs fine, however brakes and foot pedals won't unlock when we push the "unlock brake" on the instrument panel and machine won't move. Auxiliary hydraulic appear to be working. From reading this entire thread, do all the safety switches to be hooked up and operational or can they be "jumped" for testing purposes? You suggested the safety switches must be activated in a certain order? A poster from another forum suggested we do a Charge Pressure Drop Test--if you think that's necessary, what is it and how is it done? Appreciate your response.

If the problem was charge pressure the light on the instrument would be coming on and the alarm sounding. Charge pressure goes to the valve block in front of the oil reservoir where there is a solenoid valve that releases the brakes and sends oil to the servos on the hydros. The valve is activated by the instrument panel if the correct startup procedures were followed and the button pushed on the panel. The system must see the operator in the seat first and then the seat belt fastened second. I would try and connect all the switches again. With the service run switch in the run positoin, key off, watch the instrument panel when you sit in the seat. the panel should light up and go through a self check. The the park brake light and seat belt light should still be lit. Connect the seat belt and the seat belt light should go out and the loader should start and the brake released when the button is pushed. You could also have a bad solenoid coil on the valve in front of the oil reservoir. It is just hard to diagnose a problem when the system has be re-engineered. I have wiring diagrams that I put together on another forum, haytalk.com. These diagrams are mainly for the starting of the engine, but they show which circuits of the safety system is activated and when. I am not sure if the charge circuit is identified in those sections of diagrams, but the instrument panel is and so you may be able to trace that circuit. You will need to join the forum to view the files. There are several forums on the site, choose the machinery forum. At the top of the machinery forum posts are some pinned threads. Choose my NH repair etc. When you get to the next screen there will be a listing of all the posts in that thread. Scroll down until you get to the skid loader section and click on the LS.B link. It is not easy to post pdfs or photos here and I do not want to go the trouble of doing it here.

 

[[email protected]]

If the problem was charge pressure the light on the instrument would be coming on and the alarm sounding. Charge pressure goes to the valve block in front of the oil reservoir where there is a solenoid valve that releases the brakes and sends oil to the servos on the hydros. The valve is activated by the instrument panel if the correct startup procedures were followed and the button pushed on the panel. The system must see the operator in the seat first and then the seat belt fastened second. I would try and connect all the switches again. With the service run switch in the run positoin, key off, watch the instrument panel when you sit in the seat. the panel should light up and go through a self check. The the park brake light and seat belt light should still be lit. Connect the seat belt and the seat belt light should go out and the loader should start and the brake released when the button is pushed. You could also have a bad solenoid coil on the valve in front of the oil reservoir. It is just hard to diagnose a problem when the system has be re-engineered. I have wiring diagrams that I put together on another forum, haytalk.com. These diagrams are mainly for the starting of the engine, but they show which circuits of the safety system is activated and when. I am not sure if the charge circuit is identified in those sections of diagrams, but the instrument panel is and so you may be able to trace that circuit. You will need to join the forum to view the files. There are several forums on the site, choose the machinery forum. At the top of the machinery forum posts are some pinned threads. Choose my NH repair etc. When you get to the next screen there will be a listing of all the posts in that thread. Scroll down until you get to the skid loader section and click on the LS.B link. It is not easy to post pdfs or photos here and I do not want to go the trouble of doing it here.

Thanks for sharing your vast knowledge, this is invaluable information, I will see if I can get this thing running.