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MF6840 Error Code T151 - one for the MF experts!
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<blockquote data-quote="Southmec32" data-source="post: 6260210" data-attributes="member: 73226"><p>I am currently repairing hp circuit failures on 7600 and 7700 tractors but would have to double check if it is the same . Does the fault come on on startup or once you have been working for a while. The hp braking runs at lower relief pressure around 150 bar . On a 7700 this pressure is built up by the filling solenoid till the relief blows on startup and you can hear it and is the best time to test the relief valve . Some of these have been set to low from factory and need screwed ip on the hpb block. Also the circuit pressure should not fall below 50 or 70 bar i cant quite remember or it will bring up the light and error code. It will fall below if there is cicuit pressure leakage within so many braking aplications. The accumulor should be charged to 49 bar. Also some machines need a software upgrade as some only read off 1 brake sensor so if brakes are uncoupled it work read every brake aplication. This is for a 7700 and would have to check if it is same for a 6400 but will be the same princable i think</p></blockquote><p></p>
[QUOTE="Southmec32, post: 6260210, member: 73226"] I am currently repairing hp circuit failures on 7600 and 7700 tractors but would have to double check if it is the same . Does the fault come on on startup or once you have been working for a while. The hp braking runs at lower relief pressure around 150 bar . On a 7700 this pressure is built up by the filling solenoid till the relief blows on startup and you can hear it and is the best time to test the relief valve . Some of these have been set to low from factory and need screwed ip on the hpb block. Also the circuit pressure should not fall below 50 or 70 bar i cant quite remember or it will bring up the light and error code. It will fall below if there is cicuit pressure leakage within so many braking aplications. The accumulor should be charged to 49 bar. Also some machines need a software upgrade as some only read off 1 brake sensor so if brakes are uncoupled it work read every brake aplication. This is for a 7700 and would have to check if it is same for a 6400 but will be the same princable i think [/QUOTE]
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MF6840 Error Code T151 - one for the MF experts!
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