Volvo L120F

vulep · Aug 7, 2013

Hi,friends.I am new here.I am certificated Cummins tehnician and if you need help about cummins I wiil help.
I have problem with volvo wheel loader L120F with D7E LAE3 engines,common rail.There is fault monitoring steering oil preassure and engine stops.Please if anybody know what is problem and if anybody have wiring diagram of engine ECU where I can see via which pin is signal for engine stop.
Thanks in advance
Best regards

Steve 650 · Aug 7, 2013

... are you sure the code is not related with the high pressure fuel common rail system?

vulep · Aug 8, 2013

Steve 650 said:
... are you sure the code is not related with the high pressure fuel common rail system?

On driver displey write Monitoring Steering system oil preassure.If I good remember,when is common rail preassure high,write ECU PSID 097.
I have not engine ecu pin out,I think that in diagram can see where is problem.

sfrs4 · Aug 8, 2013

do you have an email address, i might be able to help with a wiring diagram.

vulep · Aug 8, 2013

My e mail bosko.kalicanin@yahoo.com
Thanks in advance

sfrs4 · Aug 9, 2013

i have sent you some wiring diagrams, thati think will help you. one of the inputs to the ecu, one of the switch that monitors pressure difference, and one of where that switch imputs into the ecu

Badar · Jan 18, 2015

I have problem with Volvo wheel loader L120F with D7E LAE3 engines, the machine was good and running perfect but there a time machine went for washing and the water penetrate to the diesel tank, and spoil the Injectors, I repair the Injectors and clean the Tank the hall system, but am facing a problem when you start the machine will start fine then switched off, as per mechanic said the machine two injectors are not working, anyone can advise me what should I do, is really the injectors need to be replace as I have repaired them at Bosch, my e-mail address is busaidyb@gmail.com

Badar
Best regards

vulep · Jan 19, 2015

Try to block one per one injector from fuel galery and measure return from injectors.

Badar · Jan 19, 2015

Mechanic told me 2 Injectors are not working, it’s could be relay, give me more possibility I can check one by one. the injectors are repaired all and all the time if there any problems we repaired, since machine is new, only 4500 hours, it’s could be the life cycle is done I contact Bosch said the injectors are fine, I was planning to buy brand new witch is costly not repaired, please I need your advise.

Badar · Mar 2, 2015

Volvo wheel loader L120F with D7E LAE3 engines I replaced new injectors and the machine start well but is not catching race few munities and switch off, what could be the problems.

Steve 650 · Mar 7, 2015

only one bad injector will not making the engine to die. When you said you repaired injectors, did you chaged them for rebuilt ones? No error codes in display? Maybee the FCV is not working properly if water have passed in it!

Badar · Mar 7, 2015

Thanks very much for your help, the Injector before are rebuild then I change to brand new, some of says ECU, and u said FCV, no error codes display, some said fuel regulator. am keeping spending money I would like to know what is the problems any one can help me this is my e-mail busaidyb@gmail.com.

Steve 650 · Mar 8, 2015

I found very strange no error appear in dash. FCV= fuel regulator. When you start the engine and put the pedal to max, the engine stays at idle ?

Badar · Mar 8, 2015

Sir the only part I did not change is Fuel regulator (FCV), but everything I change ok let me buy that part and change and see how it the engine it start, thank you so much sir, I do appreciated so much

Badar · Mar 8, 2015

Sir the only part I did not change is Fuel regulator (FCV), but everything I change ok let me buy that part and change and see how it the engine it start, thank you so much sir, I do appreciated so much

Badar · Apr 1, 2015

Dear All,
I change FCV, still the same problem but some said could be relay I should check please any idea, anyone can help me what else could be.

Steve 650 · Apr 3, 2015

I can give you more input but you will have to give me some readings... What is the fuel suply pressure ? What is the common rail pressure ? I`m still confusing that the dash don`t show code about fuel pressure. Did you changed all the injectors, been there done that; a specialized fuel shop told me they were good and the loader had no power. It finally ends to be all the injectors. Did you have a hand control throttle, could be the fuel pedal. As for your relay, I doubt about it, your engine is working ! Did you check for fuel contamination ? Check for air in fuel system by installing a see through hose. You can also install a suply hose into a 5 gallon fuel directly to fuel pump. Another test is to cancelled one high pressure pump and see if the motor will change. If you do its important just to cap the high pressure common rail an let the high pressure pump not cap to prevent pump failure. Remove 2 high pressure pump and check the camshaft condition. PSID 096 is the code for fuel system. Now you have plenty things to check

Badar · Apr 4, 2015

Thank u sir I will check all, I change all Injectors are new and pressure pump all are new, and fuel regulator new, from Bosch,

Badar · Apr 4, 2015

Steve,
Thank you very much for your help, as of now they check with Volvo agency told me could be ECU, problem as dashboard disappeared no any reading dead, nothing is appear so we can able to know the codes, if it is ECU what the symptoms, before I will spend money and change and then programmed, Please any idea advise.

Steve 650 · Apr 4, 2015

If the dash is not working, its sure your not gonna have throttle. as the dash control the hold current for the relay that is sending voltage to engine ECU. If I remember right, its the relay 12 or 13, controlled by the pin 24 from the dash!

Volvo L120F

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