The alternator is the heart of the excavator. If there is a problem with the generator, the impact on the excavator is very large. If the excavator generator set has a common failure, the excavator cannot be started. Needless to say, the construction period will be affected, and the project will also be affected.
What do the four lines above the excavator power generation represent?
What is the repair method for alternator charging failure?
How to deal with the noise of the alternator?
How to check an alternator?
What do the four lines above the excavator power generation represent?
1. It represents the terminal (B) of the battery, and the B terminal has the function of always being charged.
2. It represents the terminal (M) of the electrical appliance, which plays the role of charging the battery. The current direction is from M to B during charging.
3. The terminal (BR) representing the self-starting switch can provide pulse signals to the tachometer. Only when the BR terminal is charged and a loop is formed through the grounding of the E terminal, the M terminal and the B terminal can be pulled in.
4. It represents the ground wire (E), so that the diode can protect the coil.
What is the repair method for alternator charging failure?
1) alternator drive belt.
① Check the condition of the alternator drive belt. If the alternator drive belt is worn or damaged, it should be replaced. It requires the contact of the front-end accessories such as a quality breaker.
② Check the tension of the alternator drive belt. Adjust this tension if necessary.
2) Charging circuit. Check battery cables, wires, and connectors in the charging circuit. Clean and tighten all electrical connections. Replace all scrapped pieces.
3) alternator or regulator. Check the alternator or regulator for proper operation, repair the alternator or replace the regulator if necessary.
How to deal with the noise of the alternator?
Analysis of possible causes of failure:
1) alternator drive belt.
2) alternator drive pulley.
3) alternator bearings.
The maintenance method of the noise control fault of the alternator of the Cat 325 excavator:
1) alternator drive belt.
① Check the alternator drive belt for wear or damage.
② Check whether the alternator mounting bracket is broken or worn. Repair or replace the alternator mounting bracket to ensure proper alignment of the alternator drive belt and alternator drive pulley.
2) Loosen the nut of the alternator drive pulley and tighten the nut to the correct tightening torque.
How to check an alternator?
1. Stop the engine. Turn the key switch to the ON position. Verify that the alternator indicator is illuminated.
2. Measure the voltage between terminals B and E of the alternator. If the measured voltage is about 24V, it can be considered that the alternator circuit is normal. If the measured voltage is low, the cause of the failure may be an insufficient battery capacity or a loose wire connector. When the voltage is zero volts, then the wires between the fuse box and the alternator are loose or open. Also, if the ground wire is open, the alternator cannot generate electricity.
3. Then, start the engine and measure the voltage the alternator produces as it turns. As above, measure the voltage between terminals B and E next to the alternator. If the voltage is around 28V, the alternator is working normally. If the rated voltage is not being issued, there is something wrong with the alternator or voltage stabilizer.
If you want to get more information about the alternator, please connect Guangzhou HERUI They will be very pleased to help you.