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Thread: Claas ARES 656 start problem

  1. #1
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    Claas ARES 656 start problem

    Hello all!


    I own a Claas Ares 656 RZ tractor and for some time it refuses to start. The electric motor turns the engine, but the injection pit does not send the diesel to the injectors. I checked the injection pump at a workshop and it works correctly. There were also a few mechanics from a Claas dealer in the area and they replaced the ECU engine and still does not start (the same problem). The tractor was stopped in the evening and worked properly.
    I have tried any option to start it and I can not do anything. Please give me some thoughts on what to do next.
    I apologize for spoken English, but I'm not a native speaker.

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    Re: Claas ARES 656 start problem

    Quote Originally Posted by pronar111 View Post
    Hello all!


    I own a Claas Ares 656 RZ tractor and for some time it refuses to start. The electric motor turns the engine, but the injection pit does not send the diesel to the injectors. I checked the injection pump at a workshop and it works correctly. There were also a few mechanics from a Claas dealer in the area and they replaced the ECU engine and still does not start (the same problem). The tractor was stopped in the evening and worked properly.
    I have tried any option to start it and I can not do anything. Please give me some thoughts on what to do next.
    I apologize for spoken English, but I'm not a native speaker.

    We had a 697RTZ for a while, JD 6cylinder with a rotary pump and ECU for the pump. Pulled into the yard with a trailer load of corn, stopped the engine and then would crank over but no fire. Claas dealer workshops insisted it was the ECU, changed it, still no go, took the pump away and found that the quill shaft inside the pump that drives the distributor head in there had snapped off.

    Fixed under warranty.
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    Re: Claas ARES 656 start problem

    I do not know what to try because I changed ECU and did not start. I also checked the injection pump and it works properly

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    Re: Claas ARES 656 start problem

    Quote Originally Posted by pronar111 View Post
    I also checked the injection pump and it works properly

    Do you mean that the pump has been mounted on a test bed and checked by an injection specialist?


    Only other thought is if there is a crankshaft sensor to tell the ecu its all going round properly- no signal and the ecu may not allow the pump to fire??
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    Senior Member Recycled's Avatar
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    Re: Claas ARES 656 start problem

    we had a similar problem with new 696 , turned out the main power wire going to the fuse box was slack causing intermitant problems

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    Re: Claas ARES 656 start problem

    [QUOTE=Footsfitter;306563]Do you mean that the pump has been mounted on a test bed and checked by an injection specialist?

    Yes, the pump was tested on stanadyne stand by a specialist. I will by an endoscopy camera in order to verify the crankshaft sensor to see if there are any brokem teeth. Is it possible to be some problems with it?

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    Re: Claas ARES 656 start problem

    [QUOTE=pronar111;306594]
    Quote Originally Posted by Footsfitter View Post
    Do you mean that the pump has been mounted on a test bed and checked by an injection specialist?
    Yes, the pump was tested on stanadyne stand by a specialist. I will by an endoscopy camera in order to verify the crankshaft sensor to see if there are any brokem teeth. Is it possible to be some problems with it?


    Ok that clears the pump so its going to be as recycled mentioned above a power supply problem, an electrical connector or a sensor. Not sure what there is sensor wise on that application but often the ECU will want to see a signal that the engine is turning and sometimes fast enough before it allows the pump to start and fire the engine up.

    Does it have an electric priming pump? is that running and pressurising the main pump??? just a thought if you can't find anything else?
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    Re: Claas ARES 656 start problem

    Hello!
    I checked the rev sensor (that metal sheet that is attached to the crankshaft) with a camera and it is ok. Also ECU and all sensors were replaced.... Still doesn't start. Currently we don't know what to do next...

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    Re: Claas ARES 656 start problem

    Quote Originally Posted by Recycled View Post
    we had a similar problem with new 696 , turned out the main power wire going to the fuse box was slack causing intermitant problems

    Did you see this suggestion?? Being an ex Renault design they inherited their fair share of electrical problems. Confirming there is still 12v getting to vital components whilst cranking is worth checking.





    Quote Originally Posted by pronar111 View Post
    Hello!
    I checked the rev sensor (that metal sheet that is attached to the crankshaft) with a camera and it is ok. Also ECU and all sensors were replaced.... Still doesn't start. Currently we don't know what to do next...

    I assume that there is a Claas Romania network? Maybe it needs a technician with a laptop/diagnostics to check all the sensors are actually working?
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    Re: Claas ARES 656 start problem

    Hello!

    The main cable that supply the fuse box is ok. We had mechanics from two class dealers but they were not able to diagnose the problem. Next operation is to check each wire that is in the engine compartment. At this moment we are completely out of ideas...... Sorry for the lat replay but we are busy with spraying and second fertilization for corn and sun flower. Best regards!

  11. #11
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    Re: Claas ARES 656 start problem

    Quote Originally Posted by pronar111 View Post
    Hello!

    The main cable that supply the fuse box is ok. We had mechanics from two class dealers but they were not able to diagnose the problem. Next operation is to check each wire that is in the engine compartment. At this moment we are completely out of ideas...... Sorry for the lat replay but we are busy with spraying and second fertilization for corn and sun flower. Best regards!

    Thats a poor dealer outcome. If they can't figure it out then they should flag it up with Claas Germany. This is when their disaster recovery plan should kick in- the Claas organisation should have someone who can shed some light on this for your two dealers, thats what all the technical backup these companies brag about is for.

    Everyone can have an off day and not get something right, but its about how well they recover a situation like you have that I find is often an important factor.

    Maybe your two dealers haven't bothered to push the matter further to HQ?
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