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Common Faults of Agricultural Machine Instrument

Views: 346     Author: Site Editor     Publish Time: 2020-04-17      Origin: Site

The instrument of agricultural machine displays the operating parameters and state parameters of agricultural machine. Through the contents displayed by the instrument, the operator of agricultural machine can know the operating indicators and state indicators of agricultural machine at any time, so as to realize reasonable decision-making. The following content discusses the faults of ammeter, water temperature gauge and oil pressure gauge of agricultural machine.

 

 

Common Faults of Ammeter

The function of ammeter is to test the current of the line. Through the value displayed by ammeter, the driver can know the specific current value of agricultural machine battery during charging and discharging, so as to have a more intuitive judgment on the working state of agricultural machine battery. When the value indicated by the ammeter dial indicator is not correct, there are many reasons for its failure.

 

1. This may be caused by the looseness of the wire on the terminal post of the ammeter. In some cases, the wire on the terminal post of the ammeter may fall off. At this time, the pointer of the ammeter will not deflect at all. 

 

2. This may be caused by the weakening of the magnetic field of the permanent magnet in the ammeter. At this time, the permanent magnet of the ammeter should be replaced, or the ammeter should be replaced directly. 

 

3. When the pointer indication of the ammeter is not accurate, the reason may be the loose terminal of the ammeter, or the pointer shaft of the ammeter is stuck. At this time, check the condition of the terminal of the ammeter. If the terminal loses its insulation, remove the fault in time or replace the ammeter with a new one.

 

tractor parts

 

Common Faults of Water Temperature Gauge

The water temperature gauge shows the temperature of the cooling water of the diesel engine, which is generally composed of the water temperature sensor and the water temperature indicator. The common failure of the water temperature gauge is that the pointer does not move, including two situations.

 

1. When the power is on, no matter how the temperature of the cooling water changes, the pointer of the water temperature gauge always points to the position of 100℃, which may be due to the disconnection of the power line of the water temperature gauge, the burnout of the heating coil, the burnout of the heating coil of the water temperature sensor plug, the poor contact between the sensor and the indicator, etc. At this time, the instrument should be checked in time and the fault should be eliminated.

 

2. When the power is turned on, the pointer of the water temperature gauge points to 40℃ and it will no longer move. Even if the temperature of the engine continues to rise, the value displayed by the water temperature gauge will no longer change. The cause of this failure may be the short circuit of the sensing plug. 

 

oil pressure gauge

 

Common Malfunction of Oil Pressure Gauge

The value of the oil pressure gauge shows the oil pressure of the engine lubrication system, and its sensor is arranged on the main oil passage of the engine. 

1. Regardless of the working state of the engine, the value of the oil pressure gauge is always 0, which may be due to the open circuit of the power line of the oil pressure gauge, the burnout of the internal heating coil, the burnout of the sensor heating coil, the poor contact of the sensor heating coil, the failure of the engine lubrication system, etc.

 

2. When the power is turned on, the pointer moves to 5 kg/cm² immediately. The cause of this problem may be a ground connection somewhere between the oil pressure gauge and the sensor, or a short circuit somewhere inside the sensor. At this time, the correct way to deal with it is to turn off the power switch immediately to avoid burning the pressure gauge due to excessive current flowing through the oil pressure gauge


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