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MF6840 Error Code T151 - one for the MF experts!
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<blockquote data-quote="Oh Deere" data-source="post: 589832" data-attributes="member: 1032"><p>We work mainly on Claas machines with the same back end.</p><p>There are two problems that we have come up against recently,when the tractor is started the high pressure brake system is charged.There is a solenoid valve in the charge block along with your pressure sensor.</p><p>On the Claas the sensor works at 4.5 volts with a voltage reducer in the cab for that particular circuit only.They will become faulty and produce 12 volts at the sensor.</p><p>Also putting gauges on the high pressure brake circuit without putting a flow metre on the ccls pump will give you false information.We have had worn pumps giving good pressures and flow at 2000RPM and able to build pressure for standby at tickover but no flow not being able to charge brake circuit at tickover.</p><p>Claas test info for pump is at high rpm , it took us a bit to understand why we could not charge the brake circuit as test figures for pump where up to spec but pump was knackered.</p><p>Remember to pump brakes with engine stopped until pedal goes soft to release pressure in accumulator</p><p>Could also be a can line error ,corrosion in plugs.</p><p>Poorly adjusted brake switches will cause this error or someone riding the brake pedals</p></blockquote><p></p>
[QUOTE="Oh Deere, post: 589832, member: 1032"] We work mainly on Claas machines with the same back end. There are two problems that we have come up against recently,when the tractor is started the high pressure brake system is charged.There is a solenoid valve in the charge block along with your pressure sensor. On the Claas the sensor works at 4.5 volts with a voltage reducer in the cab for that particular circuit only.They will become faulty and produce 12 volts at the sensor. Also putting gauges on the high pressure brake circuit without putting a flow metre on the ccls pump will give you false information.We have had worn pumps giving good pressures and flow at 2000RPM and able to build pressure for standby at tickover but no flow not being able to charge brake circuit at tickover. Claas test info for pump is at high rpm , it took us a bit to understand why we could not charge the brake circuit as test figures for pump where up to spec but pump was knackered. Remember to pump brakes with engine stopped until pedal goes soft to release pressure in accumulator Could also be a can line error ,corrosion in plugs. Poorly adjusted brake switches will cause this error or someone riding the brake pedals [/QUOTE]
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MF6840 Error Code T151 - one for the MF experts!
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