When troubleshooting the circuit faults of a single beam crane, the following steps can be followed for clear troubleshooting and repair:

1. Preliminary inspection

Power supply inspection: First, ensure that the crane power supply is connected and check if the power supply voltage is within the normal range.

Insurance check: Check if the circuit fuse is blown. If it is, replace the fuse tube.

2. Conduct in-depth investigation

Circuit inspection:

Turn on the power switch and check if the wiring connections are loose or have poor contact.

If loose wires or poor contact are found, appropriate tools should be used to tighten or reconnect them.

Use tools such as a multimeter to check if the voltage and current in the circuit are normal, in order to determine if there is an open or short circuit in the circuit.

Control button inspection:

If the crane does not respond after pressing the control button, check if the wires inside the control button are broken or detached.

If a broken or detached wire is found, the control button should be repaired or replaced.

3. Specific troubleshooting

Battery malfunction:

If it is found that the crane is difficult or unable to start, it may be due to insufficient battery power.

Check the water level of the battery. If the water level is too low, add enough distilled water.

Use a multimeter to check the voltage of the battery. If the voltage is below the normal range (such as 10 volts or less), the battery may need to be replaced.

Mechanical failure:

If there are no abnormalities in the circuit inspection, but the crane still cannot work properly, it may be a mechanical malfunction.

Check the engine oil level, fuel supply, and transmission operation.

If mechanical faults are found, it is recommended to contact professional technicians for repair.

4. Maintenance and replacement

Based on the results of troubleshooting, repair or replace the faulty components.

Before carrying out any maintenance or replacement operations, ensure that the power has been disconnected to ensure personal safety.

5. Recording and prevention

Record the process of troubleshooting and repair for future reference.

Regularly maintain and inspect the crane to reduce the occurrence of circuit failures.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment